Bulletins

BulletinBulletin dateReplacement BulletinItem no.SummaryAdded
POWER TRAIN
31053105D10017226Ping, pop, snap or click noise from the propeller shaft. *tt10/28/2005
00773100171904l60e, 4l65e replacement valve body gaskets does not seem to fit. *tt10/27/2005
3276100134964l80e output carrier thrust washer changes. *tt04/20/2005
0824200408/24/200410013097Bearing growl or rattle type noise while depressing or releasing the clutch pedal. *tt04/07/2005
03073003107/01/200310012566Transmission leaks, slips, vehicle will not move. *tt03/07/2005
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
313001/01/20043130A10010079Allison lct 1000 prndl flash and/or will not move. *tc11/04/2004
309201/01/200410010222Allison lct 1000 buzz noise feel on tcc apply. *sc11/04/2004
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
030730011B04/01/2005030730011C10008638Transmission slips, delayed engagement, cold hesitation, intermittent, poor performance, power, shift, dtcs p0701, p1709, p1711, p1713, p0841, p0843, p0847, p0870, p0872, or p0875. *tt08/11/2004
990730016A10/01/2002990730016B10007838Diagnostic information for intermittent transmission downshift, slip, busy/cycling tcc or noisy cooling fan. *tt07/12/2004
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
03042100506/01/200310006121Service 4wd light on, 4wd inoperative, diagnostic trouble codes c0300 and/or c0305 set. *tt04/19/2004
00822B01/01/200400822C10005474No 2nd, no 4th and no reverse. to include 2004 light duty automobiles and trucks equipped with 4l60e or 4l65e automatic transmission. *tt02/27/2004
03073005411/01/200310004744Transmission fluid leaks out of vent when truck is started after a cold soak. *tt01/05/2004
010730002C08/01/2003010730002B10004354Malfunction indicator lamp (mil) is on; the transmission is stuck in third gear; and / or the instrument cluster is inoperative. *tt12/03/2003
0141011/18/200310004214Poor performance from a stop in 2wd, auto or 4wd hi. 2003, 2003 cadillac ext also included. *tt11/21/2003
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
POWER TRAIN - AUTOMATIC TRANSMISSION
08-07-30-01504/01/200810025462Diagnostic information on mn8, mt1 ses/mil illuminated, dtc p0757, harsh shift, delayed 2-3 shift, 2-3 shift flare, no third gear, slips in third gear or reverse. *pe08/12/2008
05073000201/01/200510013480New essential tool j 45096 23 automatic transmission oil cooler line adapter for allison transmission. *eh04/19/2005
1008200210/08/200810013129Service engine soon light is illuminated and the vehicle may not start. diagnostic trouble code p0706, which relates to transmission range switch performance may be stored. *tt04/08/2005
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
316110010546Allison lct1000 clunk noise on start in park. *eh12/01/2004
30573057A10009668Allison lct1000 pump whine noise. *tt10/14/2004
3055901/01/200410009674Allison lct1000 diagnostic trouble code p1711, p0872 after completing repairs. *tt10/14/2004
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
01932325410006495Allison lct1000 dark or discolored transmission fluid with no loss of performance. *mr05/04/2004
030730307A11/01/200303073003710005580Transmission oil leak, abnormal knocking noise heard at idle. 2500/3500 series pickup models. *tt03/04/2004
030730020C05/01/2005030730020D10005578Transmission has a harsh 1-2 shift, slipping 1-2 shift followed by a harsh engagement. *tt03/04/2004
03073005711/01/200310005581Transmission fluid leak from front of transmission - torque converter housing/pump area. 2500/3500 series models. *tt03/04/2004
03073005611/01/2003100055664l60-e automatic transmission oil pump first and second design identification. *tt03/04/2004
020730030A11/01/200302073003010005536Some customers may comment that the transmission slips, a shudder, chuggle, or vibration is felt when the transmission shifts from first to second gear. *tt03/02/2004
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
00559C01/01/200400559D100054854l80e, 4l85e automatic transmission diagnostic trouble code (dtc) p0706 and vehicle may not start. *tt03/01/2004
3259C3259E100055144l80e, 4l85e whine noise in first and second gear. *tt03/01/2004
030730037B12/01/2003030730037A10005169Transmission oil leak, abnormal knocking noise heard at idle. *tt02/10/2004
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
03073003709/01/200310004322Transmission oil leak, abnormal knocking noise heard at idle. 2500/3500 series pickup models. *tt12/02/2003
03073003810/01/2005030730038A10004323Transmission oil leak, abnormal knocking noise heard at idle. 2500/3500 series pickup models. *tt12/02/2003
00559B11/18/2003100042654l80e/4l85e may set a diagnostic trouble code (dtc) p0706 (transmission range switch performance) and exhibit a no start condition. *tt11/24/2003
00557B11/18/200310004190The allison lct1000 transmissions may experience a leak from oil pump area. *tt11/21/2003
030730020A06/01/200303073002010002863Transmission has a harsh 1-2 shift, slipping 1-2 shift followed by a harsh engagement. *tt09/29/2003
03073002005/01/200310002393Transmission has a harsh 1-2 shift, slipping 1-2 shift followed by a harsh engagement. *tt08/27/2003
020730032A11/01/200202073003210000467Allison transmission control module fastlearn procedure update required after transmission repairs. *tt02/27/2003
02073003008/01/2002634947Some customers may comment that the transmission slips, a shudder, chuggle, or vibration is felt when the transmission shifts from first to second gear. *tt10/10/2002
020417001A07/01/2002020417001634895Concerns with launch shudder / vibration on acceleration. *tt10/10/2002
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)
306112/01/20073061F10023773Dtc c0327 with or without additional dtc's setting. with four wheel drive (4wd) only. *nj01/31/2008
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
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
314301/01/200410010247Transmission oil cooler line fitting clarification. *tc11/08/2004
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
02042100607/01/2002634893Some customers may comment that the 4wd/awd indicator lights on the selector switch do not work or the 4wd/awd system may be inoperative. *tt10/10/2002
POWER TRAIN - AUTOMATIC TRANSMISSION - TORQUE CONVERTER
00252B01/01/200410005507Allison lct1000 knock noise and possible leak from the torque converter area. sit bulletin 1401124. *tt03/01/2004
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
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
03041900404/01/2004030419004A10004366Growl or moan noise coming from front axle. *tt12/04/2003
03041800306/01/200310002854Revised wheel drive shaft inner joint and seal replacement. *tt09/26/2003
03041700503/01/200310001271Whine noise from front axle. *tt04/25/2003
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 - CLUTCH ASSEMBLY - PEDAL/LINKAGE
302101/01/20043021B10008770Clutch pedal assembly squeak noise. the condition typically occurs during hot ambient temperature. *tt08/23/2004
POWER TRAIN - DRIVELINE
33003300A100135724wd models with noise, vibration on dry pavement. *eh04/21/2005
03041900308/01/200310012557Fluid leak from front of vehicle add teflon tape to front axle vent plug threads. *eh03/07/2005
1125200211/24/200210008609Clunk noise on a 3-2 downshift. *tt08/10/2004
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
60909/01/200410016217Clutch pedal squeak. *sc09/02/2005
0926200209/26/200210008630This message is about the transmission not shifting into gear with the clutch pedal fully depressed. *mj08/10/2004
0925200209/25/200210008627This message is about hydraulic fluid usage for the hydraulic clutch system. *mj08/10/2004
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
01160301/16/200310005105Concerns with the service four-wheel drive light or the four-wheel drive is inoperative with a c0327 code stored in the tccm. gm voicemail express. *tt01/30/2004
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
03042100102/01/2003100011244-wheel drive light, 4-wheel drive inoperative, diagnostic trouble codes c0327, p0836, p0500. *tt04/15/2003
020421006A10/01/200202042100610000173Inoperative 4wd/awd lamps, inoperative 4wd/awd system. *tt02/14/2003

Consumer Complaints

Fail datemilesoccurencesPurchase date
POWER TRAIN
04/15/201178000
 Tl- the contact owns a 2003 gmc sierra. the contact stated that the vehicle failed to accelerate when the accelerator was depressed. the vehicle was towed to the dealer and the manufacturer was contacted, but the vehicle was not repaired. the failure mileage was 78,000 and the current mileage was 79,059. kmj
04/15/201178000
 Tl- the contact owns a 2003 general motor sierra. the contact stated the vehicle failed to accelerate when the acclertaor was depressed. the vehicle was towed to the dealer. the manufacturer was contacted, but the vehicle was not repaired. the failure mileage was 78,000 and the current mileage was 79,059. rds
05/15/20032184
 On may 31st, the rear end differential assembly exploded sending the pinon thru the housing and the rear axle caught on fire. the truck was in the shop (perry cheverolet, inc., columbia, mo)until 6-9-03. when i arrived in bozeman, mt on 7-2-03 i was having problems with the wiring. there was a fire when i plugged the rv electrical plug into the truck's trailer plug. there was also a blown rear tail light bulb. in bozman, they replaced the complete wiring harness, the tow receptacle and 2 fuse kits. it was the opinion of the shop in bozeman (j.c.billion, gmc) that the wiring damage was part of the original fire and differential assembly damage. although gmc paid for my out of pocket expenses and for the waranty work, i am left to wonder what will happen next and just how safe am i going to be in this truck? i selected a truck bigger than what i needed at the current time, thinking that if i replaced my travel trailer in the future, i would not have to trade trucks also.
05/15/20030
 On february 18, 2003 i purchased a new 2003 truck the truck came with the service light on. when driving the 4x4 wheel light would come on as if the truck was in 4 wheel drive. the light would go off after stopping and shuting the truck off for at least 15 minutes. i went to the dealer and they said there was no fix at this time and they gave me a service bulletin, file in section:4-driveline axle bulletin no:03-04-21-001 date: february, 2003. i was told that if i was worried about the 4x4 engaging on its own while driving the only thing they could do was to disengage the 4x4 wheel drive at this time.i need to have the use of the 4x4 wheel drive as i own a large concrete construction company and use my truck all day long on jobsites. i left the dealer not knowing what to do. i was worried about damaging the 4x4 unit even more on my new truck. so two weeks later i was tired of worrying, so i took the truck back to the dealer and they disengaged the 4 wheel drive. the service 4x4 wheeel light is still on at this time. i also filed a complaint with gmc on 3/27/03 #1-85090755. i have not heard fron the dealer in one month.
03/07/200339451
 The vehicle shifted into 4 low without warning. *jb
POWER TRAIN - AUTOMATIC TRANSMISSION
02/19/2006300010002/28/2003
 The transmission clunks when shifting from 2nd - 3 rd and at times the engine will rev and finally it will take off, this has caused an issue when going through an intersection. the dealership attempted four repairs and it is not fixed. the issue started when the vehicle had 6k miles on it and it is getting worse. the speedometer is sporadic in that it will show speed reduction/increase in segments - as if it were sticking. the erroneous speed indication causes an issue when going too slow or too fast in traffic. *nm
11/28/200551000401/01/2003
 Transmission: been fixed 3 times and finally replaced a/c: repaired once front end-steering: repaired 3 times and still not fixed. *jb
09/21/20034000109/21/2003
 Transmission has clunking noise when vehicle shifts from second to third gear when starting and down shifting when stopping. the noise started at approximately 4000 miles and continues to progressively get louder as the vehicle continues to be driven. the transmission has not failed to operate at this time but expect it to fail sometime in the near future. *jb
12/01/20022
 Consumer complained about a couple of problems. one was transmission. while driving at various speeds gear slipped. when vehicle was taken to dealer for service mechanic determined that the cause was low oil. the other was for the steering column. when driving at various speeds vehicle knocked and squeaked intermittently. steering column had to be replaced once before for same problem. *ak
09/15/2004150212/28/2003
 I have a 2003 gmc sierra pickup.my problem is the transmission does not work properly.i had 150 miles on the vehicle when the trans blew,now a clunkling noise every time the vehicle shifts.gm calls this a downshift clunk noise and has issued a tsb requesting dealers not to attempt repair.this is a loud clunk which slams into the differential.i have contacted gm to no avail etc runaround. is there any place to get help for me and possibly many others?*ak
07/17/20041900007/17/2004
 I drive a 2003 gmc sierra and there is a transmission problem it makes the driving very dangerous especially at highway. speed. the vehicle cannot stay strait it either pulls to the left or to the right. the feel of the vehicle isn't right like if its dog tracking. there are clonking and ticking sounds coming from the transmission just from shifting from drive to reverse,reverse to drive...park. while driving when engaging the passing gear sometimes you hear that clonking sound like if there was a slack in the transmission. i had this vehicle since july 2004 and since then i've been to the dealership a number of times everytime they said that everything was ok and showed me paperwork stating from gm canada that clonking, ticking etc. etc. were normal operation of the transmission. it cant be cause i had a 2001 gmc truck which i traded for, that drove like a truck this one i have now drives like a tank. every hole or crack in the road i can feel when i hit a small hole or a dip in the pave the vehicle wants to dog track most of the time the truck pulls to the left, when it does there is a slight vibration you can feel from the accelerator or the brake. this vehicle i find is a accident waiting to happen. its a big vehicle and to swerve side to side scares other vehicles on the highway, which puts everybody at risk everytime i'm on the road. from all these complaints i did to gm still today they tell me and show me paperwork from gm tech line. stating that everything is normal and no work from there part should be done on this truck. it's like if gm has people working on these statements just to cover themselves from having to repair or change parts in order to save money in which i wouldn't dought. if you can help me please. let me know cause this is a very serious matter which i would like to fix before i get into an accident. i believe there is a controversy into all of this. *nm
07/26/20041012/28/2002
 After driving over about 40 miles at highway speed the transmission will begin slippping in od. rpm slowly climbs to about 3200 (normally 2100 at highway speed) with no change in vehicle speed, and eventually the 'transmission high temperature' warning appears on the dashboard display. shifting to neutral and allowing the engine to idle for about 20 seconds and then returning to drive will temporarily clear the problem, but it sometimes returns.*ak
06/11/20045
 I purchased my 2003 gmc sierra z71 in aug. 2003. in december 2003, while pulling a travel trailor, the service 4-wd light came on and the truck felt as if it had been shifted into neutral.i managed to get the truck to the side of the road and read the owners manual concerning the light. i turned the truck off as the book said and then restarted. the light stayed on, but the truck did go in gear. since this time, when i pull the trailor for a long period of time, the truck will again feel as if it is in neutral. i have to put the truck into 2nd or 1st gear to get the transmission to engage. the 4wd light comes on with or without the trailor hooked up and has been checked several times by the dealer. they have replaced the switch but this has not corrected the problem. the transmission shifts so hard it feels as if the back end of the truck will fall out. i was told this is normal operation. something needs to be done to correct this problem as this is a huge safety issue. no one can feel comfortable driving down a road and never knowing if you will be hit from behind due to this truck stalling for no reason. *ak
07/01/20041300212/14/2002
 I have a 2003 gmc sierra 1500. at 1300 miles, i lost a fitting that connects the transmission line to the radiator for the tranny cooler and the transmission was destroyed. a rebuilt transmission was put in my pickup. i now have 32000 miles on it and the transmission seems to double shift between 2nd and 3rd gear. i've had my truck in the shop 5 times to diagnose this problem. the dealership cannot reproduce/find the issue. the pressure control solenoid was replaced about 4 days ago. the transmission is still acting up.
11/01/2003104/19/2003
 2003 gmc sierra slt z71 extended cab, 13000 miles. transmission shifts slowly and slips between 1st and 2nd. drivetrain very very noisy between up and down shifts. knocking in steering wheel. *la
05/20/200330005
 While driving at any speed vehicle has a problem shifting into a gear. when the gear is changing there is a hard thump/a brief hesitation before the gear actually goes in to the proper position. vehicle had been to the repair shop five times for this same problem, but problem still persists. dealer and manufacturer have been notified of the problem.*ak
07/03/20034700104/14/2003
 I own a 2003 gmc seirra 4x4 sle (ext) cab and the transmission is very jerky between first and second gear and between second and third gear also , but at times there is a cluck noise between second and third gear. which sounds like a universal joint that is bad.first time i took it to the dealer they said they couldn't reproduce the problem. second time they change the pressure control solenoid in thethe valve body, filter, and fluid in transmission. it worked great for @ two weeks and now it's back. there is a problem here . two friends at work have the same problems with there 2003 gmc's and chevy's trucks.*ak
07/09/20032010005/04/2003
 2003 gmc sierra, 7000 miles automatic transmission is jerky. very poor performance. service department refuses to acknowledge the problem. i know for a fact this is fairly widespread. what can the dealer do about it?
1
 When vehicle was stopped on an incline with gear placed in park before engaging parking brake the transmission locked in park. in order to unlock it the consumer had to have the tow truck pull the vehicle in order to unlock it. the manufacturer advised that this was normal operation. truck is a 2003 gmc 1/2ton 4-wheel drive pickup. *nlm
04/09/2003
 While driving the fourth gear of the automatic transmission jumped. the dealer inspected the vehicle but could not duplicate or correct the problem. *nlm
POWER TRAIN - DRIVELINE - DIFFERENTIAL UNIT
07/02/2003165406/09/2003
 I own a 2003 gmc sierra 1500 z71 off road truck. i've had it in the shop four times now due to the same problem. the problem consists of excessive play/backlash in the rearend/differential according to the dealer. this excessive play/backlash is causing the truck to jerk after shifting from first to second and second to third gears. the dealer and manufacturer say this is normal according to gm specs. at one point, while sitting at a traffic light, i proceeded to accelerate after the light turned green and the truck didn't go anywhere, but after a few seconds the truck slammed into gear and spun the rear tires. this problem seems to have been corrected after replacing the transmission control solenoid for now, but the constant jerking of the rearend/differential seems to be worsening. when discussing this problem with the dealers service manger and now finally with the general manger, they still say this is normal and has been for all 2000 through 2004 gmc sierra's. that's interesting, because i owned two 2000 gmc trucks in the past and neither one of them experienced these problems.
06/04/2003300105/26/2003
 I own a 2003 cmg 1500 4x4 when i had 300 miles on vehichle i noticed a vibration in the drivetrain. i took to dealer, they adjusted tire air pressure. 2nd time in they changed bearing in front differential, 3rd time in they changed front differential carrier, this got rid of vibration, i still have a concern that the carrier come as a shell so it still has original ring and pinion. don't no if this will create a problem later or not but gear patern must have changed. *ak
POWER TRAIN - DRIVELINE - DRIVESHAFT
02/05/20042800203/23/2003
 2003 gmc sierra manual transmission - slop or clunk in drive train.. *ak
POWER TRAIN - DRIVELINE - UNIVERSAL JOINT
02/05/20042800203/23/2003
 2003 gmc sierra manual transmission - slop or clunk in drive train.. *ak
POWER TRAIN - MANUAL TRANSMISSION
02/05/20042800203/23/2003
 2003 gmc sierra manual transmission - slop or clunk in drive train.. *ak
POWER TRAIN - TRANSFER CASE (4-WHEEL DRIVE)
10/26/200976000
 Tl*the contact owns a 2003 gmc sierra. while the contact was examining his vehicle he noticed that there was oil dripping from the transfer case under the vehicle. the vehicle was taken to the dealer where the contact was informed that a cover should be put on the transfer case to stop the leaking. the vehicle was serviced by the dealer and there were no prior warnings. the current and failure mileages were 76000.
12/07/2006920001006/01/2003
 4 wheel drive transmission will shift from 2 wheel to 4 wheel low while driving. sometimes it will shift to neutral. this can be very dangerous. you basically don't have the control of the vehicle that you thought you had. *jb
09/20/2006212/28/2002
 I have been having trouble with my four wheel drive. the engine seems to bog down like i am pulling something. took it in to get looked at and the repairman had to replace a part saying that it was automatically kicking in and out. he fixed it and it was fine for about 6 months and now it is doing it again. you can even hear it in the engine, it sounds like it down shifts to pull something. *nm
50001
 When the 4 wheel drive light illuminates on the dashboard vehicle fails to accelerate. this is caused by the transfer case encoder motor locking in 4 wheel drive. dealership replaced the part, but cause of the failure is undetermined.*ak
08/03/200320630108/21/2002
 I have a 2003 gmc sierra slt ext. cab z71 (4x4), the 4-wheel drive is not working, no lights show up on the buttons. the dealer has attempted to replace the 4wd switch, this did not fix the problem, they still have the truck. the truck is less than a year old and has 20,700mi. there are service bullitens for the problem, but there is no permanent fix. why sell a 4wd product if the 4wd will not work?

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