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
31563156A10010292261 transfer case drivelines growl 1100-1200 rpm. *tt11/09/2004
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
1029200210/29/200210009574Delayed transmission engagement from park to drive or reverse, malfunction indicator lamp, range inhibit and blinking prindel, multiple diagnostic trouble codes. *tt10/07/2004
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
0002901/01/200400029A10007579Allison lct1000 may experience a neutral feeling when coming to a stop. *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
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
03042100405/01/200310002374Design change of rear output shaft and oil pump replacement parts. *tt08/26/2003
020421005A02/01/200302042100510001110Slips in 4-wheel drive, noise, vibration, leaks, hot odor. *tt04/15/2003
02042100506/01/2002634905Some vehicles will not move when 4-wheel drive is requested, noise, shudder, poor performance, transmission / transfer case slips, transmission will not upshift, slips in 4-wheel drive. *tt10/10/2002
02009000204/01/2002634226Subject regarding lubrication of propeller shaft double cardan cv type u-joint centering ball and seat.*nlm09/28/2002
22010201/22/2002629716Some four-wheel drive extended cab short bed models may exhibit a bump/clunk on stop or acceleration. *tt04/05/2002
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
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
3055901/01/200410009674Allison lct1000 diagnostic trouble code p1711, p0872 after completing repairs. *tt10/14/2004
30573057A10009668Allison lct1000 pump whine noise. *tt10/14/2004
0085601/01/200400856A10007815Allison lct1000 oil pump whine, buzz on cold start. *tt07/12/2004
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
030730307A11/01/200303073003710005580Transmission oil leak, abnormal knocking noise heard at idle. 2500/3500 series pickup models. *tt03/04/2004
03073005711/01/200310005581Transmission fluid leak from front of transmission - torque converter housing/pump area. 2500/3500 series models. *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
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
03073003810/01/2005030730038A10004323Transmission oil leak, abnormal knocking noise heard at idle. 2500/3500 series pickup models. *tt12/02/2003
03073003709/01/200310004322Transmission oil leak, abnormal knocking noise heard at idle. 2500/3500 series pickup models. *tt12/02/2003
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
03073000502/01/200310001115Service engine soon indicator illuminated, transmission slips, engine flare, delayed 2-3 shift, shifts missing, no shift, diagnostic trouble codes p0730, p0756, p0757. *tt04/15/2003
020730051A02/01/200302073005110001116Transmission shifting in and out of 4th and 5th gear (hunting) when pulling/carrying a load, unable to manually select 4th gear. *tt04/15/2003
02073005112/01/200210000761Transmission shifting in and out of 4th and 5th gear (hunting) when pulling / carrying a load, unable to manually select 4th gear. hd2500/hd3500 series. *tt03/28/2003
020730032A11/01/200202073003210000467Allison transmission control module fastlearn procedure update required after transmission repairs. *tt02/27/2003
020730011A05/01/2002020730011634961Diagnostic information for possible gear indicator (prndl) concerns for vehicles with allison lct1000 automatic transmission. *tt10/10/2002
020417001A07/01/2002020417001634895Concerns with launch shudder / vibration on acceleration. *tt10/10/2002
02073002005/01/2002634959Some customers may comment of harsh or delayed 2-1 downshift, neutral feel at a stop, shift busyness, diagnostic trouble codes p0708, p0847, p0872, p0875, p1711, p1713 from 3/4 and 1 ton pickup models. *tt10/10/2002
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
02073000409/01/2006020730004C631800New product information, grade brake feature of allison 1000 series transmission. *slc this bulletin replaces 02-07-30-004. *tt06/20/2002
02073001103/01/2002631670Subject regarding, 2001-2002 chevrolet and gmc c/k pickup and utility models, diagnostics for possible gear indicator concerns. *jg06/10/2002
02073001103/01/2002631259Subject regarding, 2001-2002 chevrolet and gmc c/k pickup and utility models, diagnostics for possible gear indicator concerns. *slc05/21/2002
02041700102/01/2002629369Some owners of c1500 series extended cab pickup models may comment on a vibration/launch shudder when accelerating from a stop. *tt04/02/2002
01073003812/01/2001010730038D628934Some customers may comment that the 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. *tt03/25/2002
01073004312/01/2001628815Subject regarding diagnostic tips for slipping or missing second, third and/or fourth gear. *tt03/21/2002
03100110/03/2001627870Information regarding a 1-2 shift shutter, which may occur on light throttle acceleration, usually when the vehicle is thoroughly warmed up. *yh02/25/2002
20080108/20/2001625114Information regarding revised transmission calibration to address driveline growl or prop shaft ring noise. *jg11/16/2001
POWER TRAIN - AUTOMATIC TRANSMISSION - CONTROL MODULE (TCM, PCM)
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
10010201/10/2002629676Subject regarding participation in powertrain program p codes. *tt04/04/2002
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
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
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
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
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
4101/01/2002637387Some vehicles equipped with the allison lct1000 transmission may experience a very harsh 2-1 downshift at a stop or on throttle reapply. *tt11/25/2002
01110111/01/2001628081This message covers trucks with four-wheel drive extended cab short bed with a bump or clunk on stop or acceleration in reference to bulletin number 01-04-17-004. *tt03/05/2002
13110111/13/2001628117Information on 4-wheel drive extended cab, short bed vehicles with 4-wheel drive extended cab, short bed with a bump or clunk on stop or acceleration. *tt03/05/2002
25100110/25/2001628027Some extended cab short bed vehicles with four-wheel drive may exhibit a bump or clunk on stop or acceleration from a stop. *tt03/01/2002
01073003611/01/2001627912Service engine soon lamp illuminated, incorrect transmission shifts, poor performance of engine, transmission slipping. *yh02/26/2002
POWER TRAIN - TRANSFER CASE (4-WHEEL DRIVE)
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
3349100148094wd inoperative and diagnostic trouble code (dtc) u1026 atc fuse open. *tt05/10/2005
335110014853Intermittent malfunction indicator lamp (mil) with diagnostic trouble code (dtc) c0374 or erratic 4wd/awd operation. *tt05/10/2005
3012B3012A10008806The nvg 136 all wheel drive (awd) transfer case and the 236 and 246 nvg selectable transfer cases operating in the auto mode may exhibit a condition of a vibration/shudder during low speed turns such as a parking lot maneuver, up to approxi08/23/2004
02042100404/01/2002634899Some customers may comment on the service 4wd indicator illuminating with diagnostic trouble code b2725 set. *tt10/10/2002

Consumer Complaints

Fail datemilesoccurencesPurchase date
POWER TRAIN
05/17/2002410/18/2001
 Problems with 2002 gmc sierra truck hesitating.*mr the consumer requested that gms assist in getting the problem resolved before it causes a major safety hazard. *cb *jb
06/15/20030
 The engine is no good, they say that the knocking at ticking is ok, gm has put out a notice indicating that this is within acceptable limits. if you heard my truck run you would think it was about to fail!
11/15/20020
 Problem with gears/transmission since purchased
POWER TRAIN - AUTOMATIC TRANSMISSION
10/16/200544062205/04/2002
 Gmc 2002 1/2 ton pickup,transmission reverse went out at 44,000 miles (first time it went out at 28,000 miles). repaired for second time parts. reaction shell gear stripped. parts shell, gear, fltr kit, seal, seal oil, gasket. r&r trans replace reaction shell and gear.*jb
07/27/200553200203/29/2004
 Dt: caller complained about transmission failure. while pulling away from a stop sign heard a noise and could not get vehicle to move. finally, got it off the road, but was unable to move forward or backward. caller said the original owner had the same problem. manufacturer wanted dealer to evaluate the problem and call them back, and for the caller to pay for repairs. . dealer had not come seen the vehicle. *ak
10/18/200426542401/20/2004
 Vehicle has a strong jerk when shifting from 1st to 2nd and sometimes has a slipping / delayed jerk when shifting from 1st to 2nd. vehicle was taken to dealership. valve body was replaced at 30,000 miles. did not correct the problem. vehicle taken back. dealer replaced transmission fluid and added additives. vehicle started making a popping noise when shifting at 30,100 miles. dealer advised this was normal. vehicle would not pull in reverse sometimes and would only shift at high rpm and no overdrive at 34,000 miles. dealer rebuilt transmission and replaced broken sun shell gear. vehicle still jerking hard / transmission slipping from 1st to 2nd. dealer notified. vehicle still under warrenty. dealer advised they would have to contact gm for repair sugguestions. 3 months have went by and dealer will not schedule repair of transmission. transmission now has popping noise when shifting all gears and makes vibration at 55mph to 65 mph. transmission still popping, jerking, and slipping from 1st to 2nd.
11/20/2003109/30/2002
 Transmission shifts with jerk from 1st to 2nd gear with a clunk noise. all other shifting appear to be smooth without the jerk or clunk. *la
01/19/20021001/19/2002
 Intermittent surges, loss of power while in motion, transmission, lack of acceleration. *mr at purchase, the check engine light came on three times before leaving the dealership lot. dealer advised that the dealer installed remote starter or alarm system was interfering with fault sensor and was not a problem. however the lost power while driving, intermittent surges and stall outs at freeway speed/85 mph still existed. on one occasion consumer was almost in an accident when the transmission clanged between gears and there was poor acceleration. consumer had to shift into 4 wheel drive or manually downshift, or turn the engine off then on again. dealer replaced pcm module, fuel pressure regulator and gaskets, fuel pump assembly. however problem still exist. dealership agreed to hold the vehicle for further investigation. further investigation revealed that the wires from the dealer installed accessories such as the alarm system and remote starter or anti-thief system, and factory wire from pcm/vcm to the transmission be replaced. dealer replaced all ignition wiring, wiring from the pcm/vcm to the transmission and replaced the control valve body that regulates the cruise control. consumer has been without vehicle for more than 21 days and will seek a replacement vehicle if wiring repairs does not remedy the problem(s). *tt *nlm
02/02/200202/01/2002
 There are problems with the shifting mechanism on the transmission. dealer was contacted. ph
05/01/200215004
 Consumer complains of premature stalling at idle. the vehicle lacks sufficient power, it surges and at times refuses to accelerate. the transmission doesn't shift down properly out of 4th gear and the air conditioning unit does not cool properly and makes whistling noises. *jg *jb
07/30/2002303/01/2002
 Transmission shifts with a strong jerk from 1st to 2nd gear, problem began 7/30/02, dealer replaced valve body, return again 8/8/02 with same problem, replaced same part, occurred again leaving dealer same day as pickup returned back to dealer again on 8/13/02 i was told it was the channel plate at that time by service and called by gm mfg and was told it was valve body again. *ak
POWER TRAIN - AUTOMATIC TRANSMISSION - CONTROL MODULE (TCM, PCM)
1801/19/2002
 The vehicle surged, the remote starter interfered with the fault sensor which caused the engine light to illuminate. the vehicle lost power while driving, and stalled, the fuel pump was replaced, however the problems continued. *ts. the transmission changed between gears, and the dealer changed the pcm. the problem was discovered to be incorrect wiring which was routed wrong within the ignition which caused the problems. *jb
POWER TRAIN - AXLE ASSEMBLY
13879106/01/2003
 While driving at 45 mph, the vehicle was violently thrown about and skidded to a stop.*mr upon inspection of the vehicle it was noted that the front axle vent plug broke and all the oil leaked out and caused the differential to seize. from what the consumer understood there was little or no protection, such a shield or guard, to deflect objects from striking the assembly. *nlm *sc *jb
POWER TRAIN - CLUTCH ASSEMBLY
08/13/20053800001/07/2002
 I have a 2002 gmc truck. at 38,000 miles the clutch went out completely. the mechanic told me the clutch plate was ok but the 2 hydraulic cylinders needed to be replaced.
03/12/20021
 Vehicle stalls on take off, dealer cannot remedy problem. *ak consumer states the problem of the vehicle stalling was solved by using high octane gasoline. the clutch does not engage properly, also sometimes sounds so loose. *yh
POWER TRAIN - DRIVELINE - DIFFERENTIAL UNIT
02/20/200470000204/01/2002
 2002 gmc sierra denali wheel bearing failure left & right side as well as front differential trouble. *ak
POWER TRAIN - DRIVELINE - UNIVERSAL JOINT
08/06/2002400001
 At 40,000 miles universal joints failed without warning. *ak
POWER TRAIN - MANUAL TRANSMISSION
12/01/2001
 Consumer states that while driving and trying to down shift the vehicle and no warning the rpm is still racing. dealer notified. mr

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