Bulletins
| Bulletin | Bulletin date | Replacement Bulletin | Item no. | Summary | Added |
|---|---|---|---|---|---|
| POWER TRAIN - AUTOMATIC TRANSMISSION | |||||
| SB-080730049B | 04/01/2011 | 10038984 | Gm: some vehicles may have transmission fluid leaking from the coolant lines in cold temperatures. *rm | 06/30/2011 | |
| SB-080730049B | 04/01/2011 | 10038984 | Gm: | 06/30/2011 | |
| PIP-4395 | 08/01/2008 | 10026149 | Gmc: flare and or harsh 2-3 shifts. this condition may be caused by leaking 1-2-3-4 and 3-5-r clutch fluid seal rings (230). models cadillacs, chevrolets, gmc, hummers, pontiacs. equipped with 6l80 (rpo myc) or 6l90 (rpo myd) automati | 10/02/2008 | |
| 207 | 10022809 | Fluid leak from the extension housing seal on 4l80e/4l85e transmission. *kb | 09/28/2007 | ||
| 070730015 | 05/01/2007 | 10021845 | 6t70, 6t75, 6l50, 6l80, or 6l90. automatic transmission - information on transmission fluid pressure (tfp) switch check for false dtc's p0842, p0843, p0872, p0873, p0877, p0878, p0989, or p0990. *kb | 06/22/2007 | |
| 3931 | 09/28/2006 | 3931A | 10021018 | No movement when the shift lever is moved to d4 or d3. normal operation when moved to d2 d1 or reverse. *kb updated. *kb | 02/22/2007 |
| 3910 | 10/11/2006 | 3910A | 10020927 | Allison transmission equipped vehicles setting diagnostic trouble code (dtc) p0877. vehicles equipped with allison lct1000 mw7 transmission. *kb | 01/30/2007 |
| POWER TRAIN - AUTOMATIC TRANSMISSION - CONTROL MODULE (TCM, PCM) | |||||
| SB-08-06-03-006A | 02/01/2009 | 10028753 | General motors: engine running with key off, continuous run; sensing diagnostic module (sdm), no communication, service air bag light illuminated (install diode to solenoid/relay). *pe | 05/22/2009 | |
| 4112 | 04/01/2009 | PIP-4112H | 10023432 | Sag or hesitation on acceleration (normal operating characteristics). equipped w/ gasoline engine and automatic transmission. *nj updated 1/30/08. *nj updated 10/01/08. *pe updated 8/12/09. *pe | 12/11/2007 |
| POWER TRAIN - AXLE ASSEMBLY | |||||
| 07320 | 03/01/2008 | 07320A | 10023654 | Front axle vent tube kinked - fluid leak. *nj csc was received. updated 4/24/08. *nj | 01/22/2008 |
| 4030 | 4030A | 10021676 | New design front axle side bearing adjusters. *kb | 06/15/2007 | |
| POWER TRAIN - MANUAL TRANSMISSION | |||||
| 4144 | 10022360 | Allison lct1000 harsh 3-2, 2-1 downshift, and abs may activate. *kb | 08/03/2007 | ||
| 3136 | 3136K | 10021019 | Slip condition in 2nd, 3rd, or 4th. damaged 2-4 or 3-4 clutch. *kb updated 10/31/07. *nj | 02/22/2007 | |
| POWER TRAIN - TRANSFER CASE (4-WHEEL DRIVE) | |||||
| 3424 | 3424A | 10017299 | Electronic transfer case unable to complete shift. *tt | 11/02/2005 | |
Consumer Complaints
| Fail date | miles | occurences | Purchase date |
|---|---|---|---|
| POWER TRAIN | |||
| 04/02/2012 | 120000 | ||
| Exhaust manifold bolts broken on 6.0 liter engine, 2 on passenger side, 1 on driver side, causing exhaust leaks and service engine light. possible fire hazard as exhaust gases entering underhood enviroment, and definate emission problems as o2 sensors incorrectly sensing diluted exhaust after leak in system, possible fuel mileage affected.. | |||
| POWER TRAIN - AUTOMATIC TRANSMISSION | |||
| 01/01/2011 | 93000 | ||
| Gm has a desgin flaw on the trans cooler lines and steering lines that cause the to leak. gm will not address to date. this occures on the 2500hd and 3500hd duramax pickups the lines have only three crimps and start to leak in cold weather. | |||
| 12/02/2010 | 67674 | ||
| Tl- the contact owns a 2007 chevrolet silverado. while driving approximately 70 mph, the contact stated that the vehicle's transmission oil cooler failed, causing the vehicle to loose transmission fluid. the dealer informed the contact that the vehicle was not under warranty and that the transmission oil line cooler needed to be replaced. the manufacture was contacted and the contact is awaiting a response. the vehicle was not repaired. the current and failure mileage was 67,674. the vin was available. bw | |||
| 04/15/2010 | 38000 | ||
| Transmission cooler line is leaking and needs to be replaced, when the weather turns cold the crimps fail and automatic trans fluid is lost causing the engine compartment to become a fire hazard when driving on the road. this is a very common problem due to the fact that the 4 other people i work with who have the same yr diesel turck or prior have had the exact same problem, not to mention countless other people online that i have talked to stating the same thing. part number gm 20759971, gm 20759973, gm20759972. this is ridiculous that i as a consumer and everyone else have to pay for a defect that could possibly endanger my life or others in daily commuting. this is way to common to have us pay for the fact that they sent us out on the road with defective parts and are not willing to pay for there mistakes. | |||
| 12/28/2009 | 41300 | 1 | |
| Automatic transmission lines 2007 chevy silverado with allison transmission. factory transmission lines leak and must be replaced. when the weather turns cold, the lines/crimps holding the rubber hose to the pipes fail and automatic transmission fluid is lost, sometimes in catastrophic manner, causing the vehicle to loose propulsion. reports of failure are extremely common, and it is not unusual, that the lines may have been replaced 3 times within the 1st 50,000 miles. gm has issued 'new, updated' parts, but they are no better than the original parts. the new part numbers are 20759971, 20759972, 20759973. while repair is covered on the 36k bumper to bumper warranty, there is no coverage on the 100k warranty. gm should replace the lines free of charge for the 1st 100k miles with a hose that will not fail. consumers can take the original gm line to a hydraulic shop, have the rubber portion of the lines replaced with standard hydraulic hose suitable for atf fluid and there are no further failures. if consumers can fix the lines, perhaps gm can find a solution. *tr | |||
| 03/03/2009 | 64303 | 1 | |
| Took my silverado 2500 in for some maintenance and the dealer informed me the transmission cooler lines were leaking at the fittings from the cooler lines to the cooler. they also informed me this was a very common problem they have seen a lot of, but there is no recall and it would be a rather costly repair. i did not pay the outrageous fee and have not yet fixed the problem... *tr | |||
| 12/28/2008 | 16700 | 1 | |
| My transmission cooler lines began leaking 3 months ago. i took it to the dealer and instead of them replacing the lines, they told me that i needed a new transmission and lines and it would cost me $6200 to fix it. *tr | |||
| 01/01/2009 | 45000 | 1 | |
| While doing routine maintenance on the truck i noticed the transmission cooler lines leaking. the failure is the cause of a poor fitting design on gm's behalf, and they have not committed to providing an updated part but instead choose to replace the lines with the same inadequate part. the leaking lines have not been replaced. *tr | |||
| 09/04/2008 | 11000 | 1 | |
| Leaking transmission cooler lines, failure at crimp between rubber line and metal line, started at 11,000 miles, replaced with new lines now leaking again at 20,000 miles. *tr | |||
| 01/21/2008 | 50 | 1 | 11/23/2007 |
| Problems when i back up and forward, the brakes make noise i went to the dealer and they tell me, that is normal, but for a new vehicle it's not i don't like it they don't do anything, this bother me, plus this is the third time i took it in and i told them since the first time that it was vibrating, it seems that they are some transmission problems too. *tr | |||
| 09/20/2007 | 400 | 30 | 09/13/2007 |
| Tl*the contact owns a 2007 chevrolet silverado 2500. while driving between 40-60 mph, the vehicle vibrated from underneath. the vehicle was taken to the dealer on three occasions. the first time, the dealer did nothing to repair the vehicle. the second time, they replaced the drive shaft and rebuilt the rear end. the third time, they repaired the transmission. the current mileage was 1,200 and failure mileage was 400. | |||
| POWER TRAIN - AUTOMATIC TRANSMISSION - COOLING UNIT AND LINES | |||
| 05/07/2010 | 2 | 12/30/2006 | |
| 2007 chevrolet silverado 2500 duromax truck. consumer states fuel injection problems *tgw the consumer stated the vehicle is still under warranty, however chevrolet was not wiling to cover the repairs, citing bad fuel was the reason for the fuel injector problem. the dealer replaced the injectors the first time they failed. also, the transmission cooler lines were replaced because they were leaking from the crimps. the headlight switch was replaced *jb | |||
| 12/05/2008 | 28000 | 2 | |
| Tl*the contact owns a 2007 chevrolet silverado 2500hd. the vehicle was taken to an authorized dealer for routine maintenance service. the technician detected defective transmission cooling lines. the vehicle was repaired under the service warranty. there was concern of the potential safety hazard. the failure mileage was 28,000. updated 02/13/10 *bf the consumer stated the transmission cooling lines that were replaced began to leak as well on or around january 2, 2010. the leaking transmission fluid enters the entire compartment of the vehicle creating a potential risk for a fire. the consumer stated gm was not addressing the issue properly as the updated transmission lines were failing in the same location . updated 02/16/10. *jb | |||
| 01/07/2007 | 21000 | 1 | 11/08/2006 |
| Failure of hose crimp in pressurized transmission cooler line. no replacement parts availability through dealers (10) or manufacturer, is indicative of a larger problem. other hose failures have been confirmed, by other owners of both 2006 and 2007 model years. possibility of catastrophic hose joint failure, at high speed, with possible resulting engine compartment fire or explosion. has been confirmed by independent ase certified mechanic. dealer representatives confirm (unofficially) that they are aware a problem exists with this line. *tr | |||