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.

6.0

fairly significant
Typical Repair Cost:
No data
Average Mileage:
127,750 miles
Total Complaints:
2 complaints

Most Common Solutions:

  1. not sure (2 reports)
1999 GMC Sierra 1500 transmission problems

transmission problem

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1999 GMC Sierra 1500 Owner Comments

problem #2

Dec 302012

Sierra 1500 SLE 5.3L V8

  • Automatic transmission
  • 145,500 miles

A D V E R T I S E M E N T S

I bought this truck used to drive to work. The trucks condition is ok for its age and millage, but the transmission seems to be slipping. When i go past 55 mph on the freeway the truck starts jerking, like there is no power from the engine or something. But i'm sure this is the transmission slipping. As long as i don't exceed 55 mph the truck is fine. This generation of GM trucks are known for having tranny issues.

- , spencerport, NY, USA

problem #1

Mar 202008

Sierra 1500 Z-71 5.3L V8

  • Automatic transmission
  • 110,000 miles

I HAVE A 1999 GMC SIERRA 1500 Z-71 AND MY TRANNY ALWAYS SLIPS. AND I ONLY HAVE 110000 MILES ON IT AND MY OTHER TRUCK IS A 1999 DODGER RAM 1500 SPORT 4X4 AND IT HAS 166000 MILES ON IT AND THE TRANNY IS ORIGINAL AND NEVER SLIPPED. I WILL NEVER BUY A GMC AGAIN CAUSE THEY SUCK. I AM GOING TO BUY A NEW DODGE RAM.

- , Kenosha, WI, USA

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