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.

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8.0

pretty bad
Typical Repair Cost:
No data
Average Mileage:
133,000 miles
Total Complaints:
1 complaints

Most Common Solutions:

  1. timing chain tension pulley (1 reports)
2002 GMC Envoy engine problems

engine problem

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2002 GMC Envoy Owner Comments

problem #1

Apr 202007

Envoy XL SLT 4.3L

  • Automatic transmission
  • 133,000 miles

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

I purchased this Envoy new and it was great until 58,000 we had the first problem. The service engine light would come on intermittently. The dealer keep changing sensors that never solved the problem. The finally told me the crank shaft bearings were bad. They were replaced under warranty. The light continued to come on. They replaced sensor after sensor it would fix it temporarily but never permanent. At 106,000 miles, the light came on and stayed on. I took it back to the dealer they charged me $850 to replace 2 sensors when that didn't work they called me to inform me I need a new engine at the additional cost of $4,500. Yikes! I was totally feed up at this point so I went and got my Envoy paid the $850 and left.

I had a shade-tree mechanic recommended by a friend look at it for me. In about 45 minutes he had pulled the valve cover and told me the timing chain had jumped 2 notches and that's why the service engine light was on. He found the hydraulic tension pulley was stuck and the chain was loose. He replaced it and now I have 168,000 miles with no service lights. I feel ripped of by GMC because they charged me a fortune and never fixed my Envoy. They are total morons! Moral of the story: If your service engine light indicates the cam sensor won't synchronize with the crank shaft sensor, have a rear mechanic check you timing chain before you let the idiots replace sensors that are not bad.

- , Powder Springs, GA, USA

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