Bulletins
| Bulletin | Bulletin date | Replacement Bulletin | Item no. | Summary | Added |
|---|---|---|---|---|---|
| POWER TRAIN - AUTOMATIC TRANSMISSION | |||||
| SB-080730049B | 04/01/2011 | 10038984 | Gm: | 06/30/2011 | |
| 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 | |
| 4133 | 4133A | 10022769 | Transmission slips, will not shift, ses light may be illuminated. *kb | 09/26/2007 | |
| 3259C | 3259E | 10005514 | 4l80e, 4l85e whine noise in first and second gear. *tt | 03/01/2004 | |
| POWER TRAIN - AUTOMATIC TRANSMISSION - CONTROL MODULE (TCM, PCM) | |||||
| SB-07-06-04-019A | 11/01/2008 | 10028831 | General motors: intermittent mil/ses/ dtc p2138 with reduced engine power (repair instrument panel (ip) to body harness connector). 2005-08 gm passengers cars/light duty trucks (incl. saturns). *pe | 06/01/2009 | |
Consumer Complaints
| Fail date | miles | occurences | Purchase date |
|---|---|---|---|
| POWER TRAIN - AUTOMATIC TRANSMISSION | |||
| 03/28/2010 | 49341 | ||
| 2006 gmc diesel with allison transmission...lines to transmission cooler leaking. it is a fire hazard...from what i read on the internet it has been a problem with all the transmission lines installed on this truck | |||
| 03/04/2009 | 32000 | 1 | |
| I have a 2006 gmc sierra 2500 with the lbz duramax and allison transmission. two of the transmission coolant lines began leaking transmission fluid at the crimp ends in march of 2009. the truck only had 32,000 miles, but was 3 months beyond the 36 month warranty period. service under warranty was denied. an on-line search reveals several others have complained about this issue and that the dealer installed oem replacement lines are no better (developing leaks soon after replacement), yet no tsb or corrective action has been issued by gm. leaking transmission fluid is a fire and environmental hazard. the leaks are getting worse. *tr | |||
| 11/30/2007 | 22800 | 3 | 01/26/2007 |
| Tl*the contact owns a 2006 gmc sierra 2500. the fly wheel, which runs with the transmission and helps change gears has had to be replaced three times within two years. while driving approximately 10 mph during the first failure, there was a loud clicking noise and it became louder over time. the dealer stated the vehicle was operating normally. a few weeks later, the noise was much louder; however, a different dealer 2 hours away diagnosed the vehicle and stated that the fly wheel failed. after being repaired 24,000 miles and a year later, the failure recurred. the fly wheel was replaced again and lasted 5 months before it failed. the power steering shaft also needed to be replaced due to it being worn out and failed again nine months later. the failure mileage was 22,800 and the current mileage was 55,000. updated 06/08/09 *bf the power steering gear was leaking due to leaking gear assembly, the hvac blower was inoperative, the flywheel was cracked. the dealer replaced the stripped and broken exhaust studs. updated 06/18/09.*jb | |||
| 09/18/2008 | 101380 | 1 | |
| I own a 2006 gmc 2500hd duramax/allison crew cab. i took ownership in feb of 2007 with 32k miles. transmission lines were leaking at that time. dealer replaced the lines under warranty. now at 100k miles and same new lines are leaking once again. this is a flammable fluid and constitutes a potential fire hazard. *tr | |||
| POWER TRAIN - AUTOMATIC TRANSMISSION - COOLING UNIT AND LINES | |||
| 01/15/2008 | 36500 | 1 | 07/11/2006 |
| Transmission cooler line leaking transmission fluid at an aluminum crimp that connects a rubber hose to the transmission cooler; an inferior design. as such, a transmission oil leak is a fire hazard. i am aware of two car fires that were caused by leaking transmission cooler lines. the last one involved a ford taurus station wagon where the owner had the transmission rebuilt by his local transmission shop (a national franchise transmission repair shop) and they cross-threaded the lower cooler line at the transmission. the transmission fluid leaked on to the exhaust cross-over pipe and the car burned to the ground on the side of road in the interstate. the owner's insurance company subrogated against the transmission shop for the damages. fortunately, no one got hurt, but they came close. *tr | |||
| 01/03/2008 | 30000 | 1 | 06/10/2006 |
| I have a 2006 gmc 2500hd that has 31000 miles on it. the transmission cool er lines are leaking and the dealer has been notified about this problem. the new parts are on backorder, meanwhile the truck leaks transmission oil on the ground which could be a potential fire hazard alone with an environmental hazard. many gmc 2500hd owners are having this problem. this is not yet a recall but needs to be addressed. *tr | |||
| 01/30/2008 | 27650 | 3 | 12/12/2005 |
| Went to gmc dealer because truck has a transmission oil leak. technician noted that all three transmission oil cooler line are leaking. according to internet forum (http://dieselplace.com/forum/showthread.php?t=202078), this is a know defect on the 2006 silverado and sierra trucks equipped with diesel engine and allison automatic transmission. several owners have had 2 or more incidents. replacement lines are no better than the originals. i am an engineer and have been involved in vehicle fire investigations in the past, some were caused by leaking transmission cooler lines dripping on hot exhaust pipes and manifolds. this is a potential fire hazard! this requires a new design for these transmission oil cooler lines. *tr | |||
| 01/18/2008 | 25000 | 3 | 01/20/2006 |
| I have a 2006 gmc sierra that has had transmission lines replaced and that keep having to be replaced because of hose leaking every year. *tr | |||
| POWER TRAIN - MANUAL TRANSMISSION | |||
| 06/01/2008 | 40000 | ||
| Tl*the contact owns a 2006 gmc sierra 2500. the contact has a manual transmission vehicle with the wrong hydraulic fluid in the clutch system. this could cause the clutch to fail without warning. when the contact depresses the clutch pedal, it does not engage the transmission and stop the vehicle. the failure occurs intermittently. the clutch and all the hydraulic parts were replaced more than once, but the failure persists. he called gmc and was informed that all the vehicles were made with the incorrect fluid. the vin was unknown. the failure mileage was 40,000. | |||