transmission shifts at 5000 rpm in first gear 2 gear around 2500 to 4000 rpm if i let off the pedal it will shift to next gear i have no power off the line but i press gas slowly it will shift i have no power climbing slight inclines takes up to a mile or two to get up to speed limit bought it used it is a gmc k2500 4 wheel drive pickup
What makes this problem better or worse?
off the line i have no power and trany screams then shifts
How long has your 1999 GMC Sierra 2500 had this problem?
RepairPal Certified shops can diagnose and repair your 1999 GMC Sierra 2500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
No way to accurately guess at it here online.
Recommend full scan testing so live transmission data can be observed during test drive - TPS should also be monitored.
TPS (Throttle Position Sensor)
