Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


pretty bad
Typical Repair Cost:
No data
Average Mileage:
120,000 miles
Total Complaints:
1 complaints

Most Common Solutions:

  1. not sure (1 reports)
2003 GMC Yukon transmission problems

transmission problem

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2003 GMC Yukon Owner Comments

problem #1

Sep 142011

Yukon XL Denali 6.0L

  • Automatic transmission
  • 120,000 miles


Currently My vehicle Goes into " Reduce Engine Power " Mode and completely loses power on the road to an engine idle. Not only is this an inconvenience but this is absolutely a safety hazard. I was almost hit from behind on a fast moving road because there was no where to pull over. I was able to take off after letting the car sit. On the second occasion when this happened I lost complete power to the motor and had no powered steering. This nearly caused an accident around a turn due to loss of powered steering. If this is not a MAJOR SAFETY ISSUE than i dont know what is.... The GMC problem code is Pd 1518 and says that this is "Throttle Actuator Control Module Serial Data Malfunction " There seems to be no fix for this issue. Research online shows that thousands of people with these GM vehicles encounter the same issue with their vehicles.

The other Major issue with my 2003 Yukon Denali is the drive tran. The torque converter is working improperly and my transmission is slipping. I understand if I were the only one with this issue or maybe eve a handfull of others than this may not a big deal. BUT due to the ability of the online web, THOUSANDS of people have reported slipping transmissions or completely faulty transmissions. For the money you spend on a luxury AMERICAN MADE SUV you would expect the vehicle to gie you some sence of security and dependability. After owning a 2005 Chevy Silverado 2500 HD as well and dealing with the numerous front end issues and recalls I dont think that I would ever buy American made again...

If i could please have some sort of a response to this and some kind of help i would greatly appreciate it. Thank so much!

- , Ipswich, MA, USA

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