Engine Performance problem
1999 GMC Sierra V8 Four Wheel Drive Automatic 140000 miles
Seems to be a problem with a rebuilt transmisson. When climbing up a grade the truck won't excellerate. Seems to be in some kind of safe mode and will only go around 20 mph. Eng will not rev up past 2000 rpm?
I replaced the fuel pump, fuel filter, throttle position sensor.
have the same problem?
Friday, October 31st, 2008 AT 10:53 AM