2004 GMC C1500 Speedometer

Tiny
DUSTY53
  • MEMBER
  • 2004 GMC C1500
  • V8
  • 4WD
  • AUTOMATIC
  • 49,000 MILES
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?
Friday, December 7th, 2007 AT 6:23 PM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
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
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Saturday, December 8th, 2007 AT 7:57 AM

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