Bulletins

BulletinBulletin dateReplacement BulletinItem no.SummaryAdded
POWER TRAIN
31053105D10017226Ping, pop, snap or click noise from the propeller shaft. *tt10/28/2005
3260100171454l80e/4l85e harsh shift or slip no tcc apply. *tt10/25/2005
335210014857Service 4wd light on with either a variety of diagnostic trouble codes or no communication with the transfer case control module. *tt05/10/2005
0824200408/24/200410013097Bearing growl or rattle type noise while depressing or releasing the clutch pedal. *tt04/07/2005
04073100101/01/200410011131Revised clutch pressure plate adjustment. *tt01/03/2005
04073100612/01/2004040731006A10011070Excessive shifter and/or engine vibration, bearing growl and/or rattle type noise while depressing or releasing clutch pedal. *tt12/28/2004
320510010861Allison lct1000 pump separator plate change disregard additional valve. *tt12/15/2004
315101/01/20043151A10010275Allison lct1000 transmission hard to remove from park. *tt11/09/2004
31563156A10010292261 transfer case drivelines growl 1100-1200 rpm. *tt11/09/2004
0083701/01/200400837A10010254Allison lct1000 overdrive disable lamp inoperative after installation of instrument panel (ip). *tt11/08/2004
309201/01/200410010222Allison lct 1000 buzz noise feel on tcc apply. *sc11/04/2004
313001/01/20043130A10010079Allison lct 1000 prndl flash and/or will not move. *tc11/04/2004
309501/01/20043095A10010217Allison lct 1000 transmission prndl inoperative and no communication with the tech 2 scan tool. *sc updated *eh11/04/2004
3105C3105B10009978Ping, pop, snap, or click noise from the propeller shaft. *sc11/02/2004
305401/01/200410009665Replacement flexplate may have larger bolt holes than the original flexplate. *tt10/14/2004
30833083B10009506M74 allison lct1000 pto gear applications. *tt10/04/2004
30023002D100088024l60e/4l65e intermittent neutral condition while accelerating from a stop or while driving. *tt 1999-2006 gm cars, light duty trucks and utilities. *tt08/23/2004
0208601/01/2004100077824l60e, 4l65e intermittent neutral from a stop or steady speed. *tt07/12/2004
0206901/01/200410007766Allison lct1000 range inhibit and/or will not move. *tt07/09/2004
0197701/01/200401977A10007580Allison lct1000 prndl flash and/or will not move. *tt07/01/2004
0211301/01/200410007455Intermittent no forward or reverse with possibly either a flashing prndl display or a range shift inhibited message. *tt06/23/2004
0159901/01/2004100072374l60e, 4l65e forward and low reverse waved steel clutch plate appearance change. *tt06/04/2004
0401903/01/2004100068114l80e / 4l85e transmission may have a condition in which the transmission overdrive gear set may fail due to inadequate lubrication as a result of a transmission casting change. customer satisfaction program bulletin. also to include 200405/14/2004
0171601/01/200410006248Allison lct1000 transmission prndl inoperative and no communication with the tech 2 scan tool. sit bulletin 1455451. *tt04/26/2004
03073005411/01/200310004744Transmission fluid leaks out of vent when truck is started after a cold soak. *tt01/05/2004
01129A11/18/200310004170Allison lct1000 serviceability. *tt11/20/2003
08040308/04/200310003869This vme message applies to the valve body for the allison series 1000 transmission revised for the 2004 model year to add modulated main pressure control. this revision will provide additional transmission oil cooler flow and reduce pump11/05/2003
05210305/21/200310003656Essential tools for servicing the allison transmission. these tools include a four-wheel drive spanner nut wrench, rear bearing puller legs, digital depth micrometer and a rear bearing installer. these tools are required to replace a cr10/27/2003
990730022A06/01/200399073002210002886Shift stabilization and tow/haul mode feature for hydra-matic 4l60-e/4l65-e and 4l80-e/4l85-e transmissions. *tt09/30/2003
POWER TRAIN - AUTOMATIC TRANSMISSION
PIP-3366-B11/01/201110043185Cadillac/chevrolet/gmc/hummer: some suvs and trucks are exhibiting a condition where by grinding/ratcheting type noise coming from automatic transmission when shifting into park while in 4wd low (4lo) range. *pe02/29/2012
392709/27/200610020489Engine with a repeat cracked flywheel. *kb10/27/2006
05073001702/01/2006050730017B100174624l60-e/4l65-e automatic transmission/torque converter clutch (tcc) shudder, water in transmission. *tt11/08/2005
05073001305/01/2005100173544l60-e/4l65-e automatic transmission second gear start, lack/loss of power when accelerating from a stop. *tt11/03/2005
3438A10017100Tcc surge and/or fluid contamination. *tt10/24/2005
349710016523Range inhibit and/or will not move. *tt09/20/2005
05073000201/01/200510013480New essential tool j 45096 23 automatic transmission oil cooler line adapter for allison transmission. *eh04/19/2005
02073001106/01/200410012151Slow or no engagement of automatic transmission no start blank prndl display flashing prndl diagnostic trouble code p0708 p0872 p0847 p0875 p1711 p1713 or u1000 set. this service bulletin replaces 020730011. *eh02/15/2005
324310011753Leak from the vent 4l80e/4l85e transmission. *eh01/31/2005
31703170C10010577Harsh 1-2 shift. *eh12/01/2004
316110010546Allison lct1000 clunk noise on start in park. *eh12/01/2004
3055901/01/200410009674Allison lct1000 diagnostic trouble code p1711, p0872 after completing repairs. *tt10/14/2004
0422200404/22/200410009235Rattle type noise due to a cracked flex plate. gm voicemail express. *tt09/20/2004
0085601/01/200400856A10007815Allison lct1000 oil pump whine, buzz on cold start. *tt07/12/2004
0133001/01/200401330A10007606Allison lct1000 buzz, moan noise at 1400 rpm with the 8.1 l18 gas engine. *tt07/02/2004
0165401/01/200401654A10007233Squawk or grunt noise that occurs on the 2-3 upshift on vehicles with 4l60e - m30, 4l60e m32 transmission. *tt06/04/2004
0160501/01/200410007174Allison lct1000 intermittent no reverse cold only.*mr06/03/2004
01932325410006495Allison lct1000 dark or discolored transmission fluid with no loss of performance. *mr05/04/2004
03073005611/01/2003100055664l60-e automatic transmission oil pump first and second design identification. *tt03/04/2004
03073005711/01/200310005581Transmission fluid leak from front of transmission - torque converter housing/pump area. 2500/3500 series models. *tt03/04/2004
3259C3259E100055144l80e, 4l85e whine noise in first and second gear. *tt03/01/2004
0070201/01/200400702B10005476Slip condition in 2nd, 3rd or 4th damaged 2-4 band 3-4 clutch on the 4l60e/4l65e automatic transmission. *tt *mj03/01/2004
0149301/01/200410005508Allison lct1000 prndl flash and/or will not move with p0721, p0731, p0732, p0733, p0734, p0743, p0746, p0747, p0776, p0777, p1720, p1721, p1723 and p1724. *tt03/01/2004
010730038B10/01/2005010730038C10005162The service engine soon lamp is illuminated, no 3rd and 4th gear, the transmission does not shift correctly, the transmission feels like it shifts to neutral or a loss of drive occurs. *tt02/09/2004
03073005310/01/200310004747Allison automatic transmission valve body hardware changes. *tt01/05/2004
030730031D02/01/2006030730031E10004379Transmission leaks, slips, vehicle will not move. *tt12/04/2003
03073004408/01/2004030730044A10004326Information on allison transmission service repairs - full service of internal components. *tt12/02/2003
00557B11/18/200310004190The allison lct1000 transmissions may experience a leak from oil pump area. *tt11/21/2003
0134311/18/200310004122Allison lct1000 diagnostic trouble code (dtc) p0700 and no communication with the tech 2. *tt11/19/2003
02073000409/01/2006020730004C631800New product information, grade brake feature of allison 1000 series transmission. *slc this bulletin replaces 02-07-30-004. *tt06/20/2002
POWER TRAIN - AUTOMATIC TRANSMISSION - CONTROL MODULE (TCM, PCM)
PIP339402/01/2008PIP3394E10024283Duramax diesel injector driver codes with 6.6 engine (vin 2 - rpo lly). *nj04/01/2008
429012/01/200710023751Engine surge or stall at stop and/or dtc p0742 possible tcc applied. equipped with allison lct1000 transmission rpo m74 or mw7. *nj01/30/2008
0148301/01/200410005496Vehicle has no pcm (power train control module) communication with tech 2. sit bulletin 1400427. *tt03/01/2004
0147311/18/200310004274Allison lct1000 diagnostic trouble code (dtc) p0700 unable to communicate with the transmission control module (tcm) using the tech 2. *tt11/24/2003
00938B11/18/200310004179Allison lct1000 repeat transmission control module (tcm) failures with possible multiple diagnostic trouble codes (dtcs). *tt11/20/2003
POWER TRAIN - AUTOMATIC TRANSMISSION - COOLING UNIT AND LINES
PIT-472210/01/200810026804Gmc: fluid leak from transmission oil cooler lines due to corrosion. all 2000-2006 light duty trucks equipped with the light duty automatic transmission. *pe12/18/2008
POWER TRAIN - AUTOMATIC TRANSMISSION - LEVER AND LINKAGE - COLUMN SHIFT
0185601/01/200410006712Allison lct1000 will not shift from park due to ice, snow or mud build-up on shift linkage. *mr05/11/2004
020730024A08/01/2005020730024B634999Diagnosis of cracked or broken transmission case. *tt 2006 and prior cars and light duty trucks. *tt10/11/2002
POWER TRAIN - AXLE ASSEMBLY
40304030A10021676New design front axle side bearing adjusters. *kb06/15/2007
336410014953Rear axle retainer button breakage. *eh05/12/2005
329410013541Highway speed vibration on smooth surface. *eh04/21/2005
313710010612Service 4wd light on and no communication with transfer case control module. *eh12/02/2004
30013001A10008872The service information and owners manual do not show a service interval for the 8.6, 9.5, 9.75, 10.5, and 11.5 inch rear axles with or without g80 (locking differential). *tt 2006 all general motors light duty trucks, vans and utilitie08/25/2004
030419001A09/01/2004030419001B10004717Use of synthetic front axle lubricant for 4wd vehicles sold in cold weather climates. *tt this bulletin replaced previous bulletin dated 10/01/2003. *tt01/02/2004
POWER TRAIN - AXLE HUBS
01222A01/01/200401222B10007278Repeat rear axle hub seal leak. *tt06/09/2004
POWER TRAIN - CLUTCH ASSEMBLY
387010020238Clutch pedal fade or clutch will not disengage typically when towing. *tt08/21/2006
POWER TRAIN - DRIVELINE
33003300A100135724wd models with noise, vibration on dry pavement. *eh04/21/2005
0211601/01/200410007447Highway speed vibration on k2500hd 4wd vehicles equipped with a 4l80e automatic transmission. *tt06/23/2004
POWER TRAIN - DRIVELINE - DRIVESHAFT
04049500103/01/200410008653Revised wheel drive shaft nut torque specification. *tt08/12/2004
POWER TRAIN - MANUAL TRANSMISSION
414410022360Allison lct1000 harsh 3-2, 2-1 downshift, and abs may activate. *kb08/03/2007
31363136K10021019Slip condition in 2nd, 3rd, or 4th. damaged 2-4 or 3-4 clutch. *kb updated 10/31/07. *nj02/22/2007
00908D01/01/200400908E100054416.6l and manual transmission growl noise while engaging or disengaging clutch. *tt *mj02/27/2004
00908C01/01/2003100044096.6l and manual transmission growl noise while engaging or disengaging clutch. these are c/k models. *tt12/05/2003
POWER TRAIN - TRANSFER CASE (4-WHEEL DRIVE)
3665100189264wd inoperative and possible dtc c0327 stored in the transfer case control module. *tt01/24/2006
05-04-21-00301/01/2008050421003C10017464Service 4wd light illuminated, diagnostic trouble code (dtc) c0374 set. *tt updated 10/05/07. *nj inspect wiring harness to transfer case speed sensors, replace wiring harness. updated 7/18/08 *pe11/08/2005
34243424A10017299Electronic transfer case unable to complete shift. *tt11/02/2005
352610016558Intermittent service 4wd light comes on with diagnostic trouble code (dtc) c0306 or c0308 stored in tccm. *tt09/22/2005
335110014853Intermittent malfunction indicator lamp (mil) with diagnostic trouble code (dtc) c0374 or erratic 4wd/awd operation. *tt05/10/2005
3134B3134C10010044Service 4wd indicator illuminated. *tc with diagnostic trouble code co327. *tt11/03/2004
020421006C03/01/2004020421006D10004357Inoperative 4wd/awd lamps, inoperative 4wd/awd system. *tt12/04/2003
01267B11/18/200310004200Service 4wd light on no codes besides u1000 codes. service vme. *tt11/21/2003
01267A11/18/200310004104Service 4wd light on, the 4wd is inoperative and no codes besides u1000 codes. service vme. *tt11/18/2003

Consumer Complaints

Fail datemilesoccurencesPurchase date
POWER TRAIN
02/08/2012154000
 Tl- the contact owns a 2004 chevrolet silverado. the contact stated that after parking and exiting the vehicle, she heard an abnormal clicking noise as the vehicle started to roll away in reverse. while attempting to stop the vehicle, the driver's door opened and slammed her to the ground, traveling over both of her legs. the vehicle then crashed into a fence. a police report was filed. the contact sustained damage to the nerves and arteries of her legs. the vehicle was destroyed. the manufacturer was not made aware of the failure. the failure and current mileage was 154,000. kmj
02/08/2012154000
 Tl- the contact owns a 2004 chevrolet silverado. the contact stated that after parking and exiting the vehicle, she heard an abnormal clicking noise as the vehicle started to roll away in reverse. while attempting to stop the vehicle, the drivers door opened and slammed her to the ground, traveling over both of her legs. the vehicle then crashed into a fence. a police report was file. the contact sustained damage to the nerves and arteries on her legs. the vehicle was destroyed. the manufacturer was not made aware of the failure. the failure and current mileage was 154,000. pm
12/23/2008210001
 My vehicle is a 2004 chevrolet silverado k2500 ext lwb 4wd with approximately 21,000 miles. i have used the four wheel drive feature off and on as needed to negotiate slick road conditions without any problems prior to this incident, which occurred on 12/23/08: while driving in four wheel drive, high range, at approximately 20 mph on an ice covered road the front wheels locked up without warning, causing me to lose control and skid off the road. had i been going faster, or if i had been in a traffic situation, there could have been a serious accident, possibly resulting in injuries or death. this front wheel lock up condition is still present as long as the four wheel drive selector is in either high or low range. in two wheel drive the problem is not evident. i have made an appointment with the selling dealer to diagnose the problem, but as yet i do not know the root cause of this malfunction. although this incident was a near miss, i am reporting it because of the serious nature and the hope that a safety recall may be issued so that other accidents may be avoided. *tr
06/01/200523801601/05/2004
 Dt*: the contact stated while making a left or right hand turn the steering wheel became difficult to turn. this occurred on normal roads during normal steering. the vehicle was taken to the dealership for inspection. upon inspection, the dealership replaced the steering shaft however, the problem still exists. the manufacturer was alerted. updated 3/9/2006 - left front axle front seals leaked. the consumer heard noise in the rear end. the power steering pump flow control was replaced. the body control module was replaced. the front differential shaft seal were replaced. the tires were chopped due to alignment being out of adjustment. driver's door had to be realigned. master cylinder was replaced. *nm
POWER TRAIN - AUTOMATIC TRANSMISSION
01/01/2009760001
 2004 chevrolet silverado. at about 20,000 miles the truck started to hesitate whenever i would take off from a red light, it would do this about once a month or so. at 30,000 miles or so, it would kind of jump into gear when first taking off or jump into reverse. dealer would say they test drive at each oil change but could not find nothing, i was sure they wouldn't because it didn't happen every time. now it's occurring every other week or so. finally at 76,000 miles it wouldn't get pass second gear, dealer finally found a problem and now it's $2800 to replace parts. no heavy city driving, i only live 5 minutes from work. i put the truck on the highway once a month to travel about 300 miles round trip. the only time the dealer wrote anything down, i discovered, was after the warranty expired. i talked with another 2007 silverado owner and they have 17,000 miles and the transmission is jumping into gear. *tr
01/07/200745000108/06/2004
 1. noticed transmission slipping over the last few months 2. a few weeks ago, the tail light, right turn signal and cruise control and dash lights started malfunctioning 3. recently, the paint around rear passenger door and roof is peeling. *nm
11/15/2005164015010/05/2004
 Dt*: the contact stated while in motion the transmission slipped and jerked intermittently. the vehicle was taken to the local dealership for inspection. the dealer greased the driveshaft with hi-temperature grease on the spleen. at 2000 miles later, while driving at 70 mph, the driveshaft sheared, broke away from the transmission and rear end. the contact lost control of the vehicle. however the vehicle was able to be pulled onto the emergency lane. the vehicle was towed to the local dealership where the dealer replaced the driveshaft and transmission. *ak
12/20/2005210/15/2004
 Failure of the neutral position safety switch, 2004 chev silverado diesel with allison transmission. the safety switch shorts out and fails due to wet driving conditions. this failure results in the transmission going into a fail safe condition that does not allow the transmission to shift, stranding the vehicle. chevrolet has redesigned the part now 3 times, but will not warranty or stand behind their product. this switch has failed on me twice during snow conditions. *nm
12/02/2005120001006/14/2004
 When vehicle has been driven for less than 2-3 miles and when transmission is cold the following occurs: when the vehicle operator stops at an intersection, stop sign, or street corner - the engine and transmission continues to propel the vehicle forward while the brakes are applied. the result is that the brakes are fighting against the engine. the vehicle operator must put the vehicle in neutral to stop the vehicle. in many cases, the vehicle travels well into the intersection or well past the normal stopping point before it finally comes to a halt. the result has been several near colliisions with cross traffic. the dealer has been consulted, but the response has been: unable to duplicate the problem - all systems operating correctly this is not true!! this vehicle has only 16,000 miles and is 18 mos old - but this has occurred nearly 10 times. the most recent is 12/2/05. *nm
02/01/200516000106/12/2004
 Dt: 2004 chevrolet silverado. the consumer states that the transmission has a slip in it and it stalls. the dealership insists there is nothing wrong with the vehicle and it cannot be fixed. the vehicle hesitates and then clangs when it catches into gear. the manufacturer stated they need to speak with the dealership before they could make a decision. the problem has been occurring since approximately february 2005. this does not happen all of the time. *ak
08/20/20051002008/01/2004
 Truck will not move initially when put into drive or reverse after it has been parked and just been started . automatic transmission seems to loose fluid in torque converter after setting. this has been since new and is getting worse.
06/24/20041500205/29/2004
 Dt: when the vehicle sits on a grade it will roll backwards when in drive. the transmission will read a false neutral on level ground. the consumer took the vehicle to the dealership and they replaced the transmission, but the problem recurred. this vehicle has a 4l80e transmission. the problem started approximately a months after purchasing the vehicle. has not hit anything yet, but has come close on several occasions. a service writer at groth brothers chevrolet told consumer it was normal for the vehicle to do this. consumer has a case open at general motors #1-258070464.*ak
06/01/200511/01/2004
 2500hd w/allison transmission. have taken truck in several times to dealer because while backing up in reverse the tranny surges. dealer keeps saying that they can't duplicate the problem
02/01/2004410/01/2003
 2004 chevrolet silverado experiencing problems with transmission.*mr....transmission bangs when shifting from 2nd to 3rd gear and downshifts hard from 3rd to 2nd gear. reported problem to dealer in february 2004 at 3796 miles. repaired on march 2, 2004 as per bulletin 1430080. problem recurred and was reported to dealer in october 2004, and dealer indicated it was normal as per bulletin 1430424. at this time, service manager provided bulletin 1538220 which stated that problem was corrected in transmission built after february 2004. problem again recurred in november 2004 and march 2005, and dealer stated that it was just excessive drive line lash. consumer reported this to gm, and they increased warranty terms to 5 years/75000 miles. consumer claimed warranry was no help because if dealer won'r correct problem now they won'r correct it later. *ak
11/01/200420001
 I have a 2004 chevrolet silverado z71 pickup crewcab and a clunking began in the transmission around 2000 miles and has worsened. the truck now has 19,000 miles and the dealer said there was not a problem and it was normal for this truck. i know this is a problem from doing some searching on the internet and want to know what will be done to correct the problem.
04/14/2005255001009/28/2004
 Dt: while driving, the consumer found he was unable to get the engine out of 3rd gear as though it needed to be geared down. the vehicle is an automatic and thought it was an isolated incident. however, when it happened again, it pretty consistent in doing so. the vehicle was taken to the dealer. the dealer said it could be fixed and did repair. diagnosed a shift solenoid, which was replaced. about 1 day later after repair, the same thing occurred. returned to dealer and was informed that the valve body needed to be replaced. after taking the valve body apart, it was found that it was not the problem. the dealer stated the transmission was the problem. the check engine light illuminated on and that was the first time it had illuminated. spoke with dealer about this. the next day, the gauges worked but the led light would not light up along with the odometer. after driving half a mile, the lights slowly come on but felt this was a safety concern as it may be electrical. *ak the vehicle would not shift from 3rd to 4th gear. *jb
01/01/19011
 While backing up the vehicle would jerk back and surge. truck would not stop changing rmp unless it was taken out of reverse, put into neutral then put back in reverse. this is an intermittent problem. transmission problems. *bf the vehicle was taken to the dealer but they were unable to find the cause of the problem. (2004 chevrolet silverado 2500 hd with and allison 1000 automatic transmission). *nm
08/01/20042000105/07/2004
 A clunk sound emanates from the driveline of my 2004 silverado mostly when shifting from 2nd to 3rd and from 3rd to 2nd. the clunk also occurs between no acceleration and accelleration while in 2nd gear. occasionally the noise occurs between 1st and 2nd gear. the problem began at approximately 2000 miles. it has gotten worse as i now approach 20,000 miles. i am concerned about a driveline failure or damage to driveline components due to repeated torsional impacts.*ak
10/05/2004150020
 Vehicle shifted very hard, and there was an incident of shutting down. also, dashboard lights flashed on and off. dealer could not duplicate the problem.*ak
11/29/2004103
 Consumer complained about a transmission problem. when driving transmission sounded and rode roughly. consumer took the vehicle to dealer on three occasions . dealer was unable to determine the cause of failure. manufacturer was also contacted. *ak
11/09/2004107/01/2004
 Transmission went of gear whenever the key is in the accessory position. this caused a collision.*ak
06/22/200410562
 After towing a trailer and putting the vehicle in reverse vehicle jumped and tore a piece of rubber out of the tire. dealer stated that the vehicle was repaired. however, the transmission jumped from second gear to reverse without warning. consumer stated that the dealer said there was no code set, and to continue driving, but the consumer refused.*ak
06/01/2004103/01/2004
 Three year old child took vehicle out of park and the vehicle rolled and crashed into the carport.*mr the consumer requested compensation for the damage to the vehicle but was denied. the representative indicated that there was a design change therefore he could not received compensation. *nm
05/18/200490004
 The vehicle has problems shifting from first to second gear. sometimes the gears change smoothly, and other times there is a thumping sound accompanied by jerking. this problem has occurred at least four times in the last month. *ak in addition when making the transition from a low speed to a higher speed the vehicle's transmission would not engage into the proper gear. this made it seem like the vehicle was in neutral. the dealer fixed the problem with a retrofit kit and the vehicle seems to be working fine. the vehicle's cd player was not functioning properly. the dealer replaced and reprogrammed the cd player. *nm
12/27/200317001
 Hard shifting from 1st to 2nd gear - slipping into overdrive - eventually failing to upshift untill rpm reached aprx 3500. *ak
POWER TRAIN - AUTOMATIC TRANSMISSION - CONTROL MODULE (TCM, PCM)
11/11/20031368310/13/2003
 Purchased a new 2004 chevrolet silverado z71. the four wheel drive select panel failed. returned the vehicle to sandy sansing chevrolet pensacola, florida dealer for repair. the service manager stated chevrolet could not fix the problem for two to five months because the problem is a computer software defect. upon further research the 2000 chevrolet silverado has the same problem. the research and development at chevrolet knew there computer software had a defect when making this vehicle was made available for the consumer. chevrolet should replace these defective vehicles.*ak
POWER TRAIN - AUTOMATIC TRANSMISSION - LEVER AND LINKAGE - COLUMN SHIFT
10/26/200513000112/01/2004
 Dt: the contact stated vehicle would not go into park. he thought he had put the car into park but when he began to exit the vehicle it started moving. when he looked at the shift indicator it was in reverse. he checked to see if there was something lodged in the column shift. the contact said he did not find anything lodged in the column shift. at this point the vehicle would only go into reverse. but, yesterday when he was inspecting the vehicle noticed it would only go into first and second gears. the vehicle has not been inspected by a dealer to determine the cause of the problem. *ak
POWER TRAIN - AXLE ASSEMBLY
10/09/2005102/01/2005
 Dt: the contact's husband heard a noise in the vehicle. she thought it was the brakes because it sounded like metal to metal. when the vehicle was checked at the dealership one could pull the tire out because the pin that held the axle had dropped down into the differential unit. this could have caused a serious accident. the contact purchased an extended warranty. the driver side was replaced under warranty but the extended warranty company would not agree to replace the passenger side even under the warranty. *ak
07/05/200527000205/07/2004
 2004 chevy silverado 2500 diesel, four months old(4000miles) rear axile went out. said default from the manufactor. took fourteen days to get new one.chevrolet built new from st.louis and shipped it to be put on. they gave me a little car to drive. 27000 miles and now rear axile leaking. took to dealer. they said nothing but normal leakage coming out. ( whats normal leakage on a axile? they are not suposed to leak on the brakes.) looked like it was on fire smoking so bad and could smell axile grease. seen some on tires. but this is normal leakage.was told to drive it till it brakes down.also everthing in the dash stops working then it will just come back on.
01/16/200520045112/31/2003
 Accelerating after start up the front axle locked up in 4 wheel drive. the front axle was repaired. *ak vehicle operated in 2 wheel drive. *ak
10/15/20034200108/29/2003
 Front axle assembly failed causing the vehicle to vere left into a telephone pole in my driveway. i was traveling according to the computer 20 mph.*ak
POWER TRAIN - AXLE HUBS
04/20/200649750112/11/2003
 Left front hub assembly total failure. apparently hub stayed locked in four wheel drive and destroyed hub. the failure was noted when extreme vibration and lack of steering response occurred. failure was at 49,750 miles. hub assemblies should last life of vehicle. repaired at my own cost after chevrolet refused to repair. *jb
POWER TRAIN - CLUTCH ASSEMBLY
01/03/200512250505/28/2004
 On three separate occasions while applying the brake pedal it went to the floor. the vehicle failed to stop. the driver was able to maintain control of the vehicle, and drove it to the dealer for inspection. however, the mechanic could not duplicate the problem at this time. *ak the abs/brake light stayed on, there was an intermittent rattle in the flywheel, the consumer stated that the clutch has no throw. *sc *jb
POWER TRAIN - CLUTCH ASSEMBLY - PEDAL/LINKAGE
01/12/200511256310/31/2003
 Dt: clutch failure, vehicle has been to the dealer three times for the same problem. they have temporarily fixed it. they replaced bearing, flywheel, pressure plate, and the slave cylinder. this was the first time. the second time they replaced the master cylinder. the third time they replaced the hydraulic fluid. this started on january 12, 2005. this usually happened when driving straight for four or more hours. the last time dealer took vehicle to dealer for fourth time, took out the frame, and there was an increase in clutch pedal travel, and pedal became momentarily spongy. *ak
POWER TRAIN - DRIVELINE
05/05/200518405/05/2004
 My 4 wheel drive pickup has shifted from 2 wheel drive to low 4 wheel drive without command. it is now in the shop for the third time for the same problem. this could be deadly at high speeds. i am awair of one truck of the same make and model that crashed into a ditch when this happened.
11/01/200411000103/17/2004
 I have a clunk noise in the transmission. i have taken my vechicle to the dealer many times they said there is no fix for this problem. they handed me a document id# 1430424 and will not fix they truck.*ak
POWER TRAIN - DRIVELINE - DIFFERENTIAL UNIT
10/09/2005102/01/2005
 Dt: the contact's husband heard a noise in the vehicle. she thought it was the brakes because it sounded like metal to metal. when the vehicle was checked at the dealership one could pull the tire out because the pin that held the axle had dropped down into the differential unit. this could have caused a serious accident. the contact purchased an extended warranty. the driver side was replaced under warranty but the extended warranty company would not agree to replace the passenger side even under the warranty. *ak
POWER TRAIN - DRIVELINE - DRIVESHAFT
02/22/20063500401/26/2004
 2004 chevy silverado xcab 4x4 1500 shutter in rear cab area?replaced drive shaft/now instrument cluster broke/changed out shocks/changed factory tires/will not brake manufactures gmvw+tow package/have sued chevrolet for $6000/i'll do it again!drivers side steering /shock/tire pounding in 50000 miles highway what next in 2 years. *jb
11/15/2005164015010/05/2004
 Dt*: the contact stated while in motion the transmission slipped and jerked intermittently. the vehicle was taken to the local dealership for inspection. the dealer greased the driveshaft with hi-temperature grease on the spleen. at 2000 miles later, while driving at 70 mph, the driveshaft sheared, broke away from the transmission and rear end. the contact lost control of the vehicle. however the vehicle was able to be pulled onto the emergency lane. the vehicle was towed to the local dealership where the dealer replaced the driveshaft and transmission. *ak
POWER TRAIN - DRIVELINE - UNIVERSAL JOINT
07/20/2005110/15/2004
 Early 2004 silverado 3500 diesel. the extension housing between the transmission and the transfer case cracked due to vibration from the drive shaft u-joint failure. technical bulletins from chev address this as a common problem. they have redesigned the parts but will not stand behind their product to repair any existing problems. *nm
09/01/2004005/09/2004
 Clunking noise sounding like a u-joint in both reverse and drive from first to second gears. happens at any speeds. two repair center/chevrolet dealers stated this is a common noise and feeling. there was a bulletin from chevrolet about it and there is not repair. told that you have to live with the noise. *nm
POWER TRAIN - MANUAL TRANSMISSION
03/14/2005403/18/2004
 Since i've bought my 2004 chevorlet silverado. i've had the oil pump replaced. then i stated to hear noises in my engine. i took it back to have then look over the lifters and valves and power/sterring, it is still making a winedy noise. they said that's normal. then i took it into a friends place, brake masters of camarillo. they told me it is the power sterrinng pump. so i tookit back to the, and i told them i didn't want it back til it was fixed. they told me it would just sit there and there was nothing wrong w/ it. so i took it and now i'm going to take it in again for the same winedy noise and see what they say now. i have not been satisfied w/ this truck. the transmission has been slipping and other noises have been getting worse, and they just don't want to fix it. they just want to blow you off and tell you that everything is normal.
POWER TRAIN - TRANSFER CASE (4-WHEEL DRIVE)
01/09/200529550203/09/2004
 After an average cold night about 0*to - 7* f, snow and ice were on the roads so the vehicle was parked in 4wd and left for the night, when i went to work the next day, the truck made a very loud growling noise from the front differential and trive train for about 20 - 30 miles. turns out the front diif fluid is a standard 90w gear oil. the fluid froze causing damage to the transfer gears and locking up the right front axle cuasing the 4wd to not engage properly. took to local dealer in kearney, mo and verified damage to gears and axle. gm was contacted, and initially advised of no proplem repair. dealer removed cover plate and found signifigant gear and axle damage, gm then replaced the whole front drivetrain assembly as it was under warranty. *ak
11/10/20049500203/25/2004
 I have a 2004 chevrolet silverado. i have had it to the dealer's service department (so far) twice and the first time they did not drive the vehicle so they stated they could not duplicate the problem. the second time the service tech rode with me and could hear the problem. they took the vehicle in and diagnosed it as transfer case driveline growl. the dealer called chevrolet/gm in detoit and was told that there is not a correction@this time-no repair should be attempted.*ak
02/05/20045001
 While driving the vehicle on an icy road the 4 wheel drive system malfunctioned which caused the 4 wheel drive to engage automatically in 2 wheel drive. *nm

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