2004 GMC C1500 Speedometer

2004 GMC C1500
49,000 MILES • V8 • 4WD • AUTOMATIC
Avatar
DUSTY53
  • MEMBER
  • 1 POST
About a week ago I noticed that my tachometer was behaving erratically and ended up buried at top end when it was obvious that the truck was running fine. Today the speedometer and tachometer are both registering incorrect readings. Is this mechanical or electrical and what's the fix?
Dec 7, 2007 at 6:23 PM
Advertisement
Avatar
2CARPRO JACK
  • ✓ASE Certified Mechanic
  • 11,533 POSTS
  • ASE Certified Mechanic
Sounds like a bad connection at the instrument cluster. Might need to remove it and check connector for corrosion and or loose connections. Those get 2 different signals to work,so it could just be a bad connection
Dec 8, 2007 at 7:57 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.