1998 GMC Truck shifting problems

1998 GMC TRUCK
235,000 MILES • V8 • 4WD • AUTOMATIC
Avatar
SHEILARAE
  • MEMBER
  • 1 POST
truck shifts ok when cold. When warmed up it will not go into overdrive or gear one. I have already changed the electrical harness and it is not the ignition switch, what else should I be checking :(
Oct 18, 2010 at 11:29 PM
Advertisement
Avatar
HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
take it toa trans shopwhere they can scan it to seeif any codes are set. It could be somethingelectricalor the trans bad itself.
Nov 2, 2010 at 8:09 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.