Four problems related to gasoline engine have been reported for the 2000 GMC Sierra. The most recently reported issues are listed below.
Problem only occures when engine and transmission are completly warmed and transmission is in overdrive mode. If transmission is in drive "3" no problems occur at any engine speed. Dealer states on repair order, "normal condition at this time until an update comes out". Suggestion was made by dealer that this could be caused by tourque converter.
The consumer had the first oil change at 3500 miles and ever since then has had to add 1 quart of oil every 2 weeks, the vehicle is currently at the dealer .
There is and has been an engine knock since 7/2000, has been in shop 6 times for same problem, GMC contends carbon knock, getting worse. Idles rough, told by dealer and GMC it is a characteristic of vehicle. GMC says they will continue to hornor warranty. What happens when warranty exprires, and the piston comes through the block. Drivetrain hestiates when in gear.
No summary listed for above vehicle.