Speedometer
10

Asked by Joe Mar 20, 2016 at 07:30 AM about the 1998 GMC Sierra 1500 C1500 SLE Extended Cab SB

Question type: Maintenance & Repair

Speedometer shows that I am going 20 mph faster
than I am really going.

2 Answers
10

Joe answered 8 years ago

It has to be something else because I have owned this truck for ten years and this just. Started 2 years ago. I have the size tires on it that it came from factory with and have not changed transmission.

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