Chevy/GMC Duramax 04.5-05 LLY Discussion of Chevy and GMC Trucks with LLY Duramax Turbo Diesel Engines

Speedometer Acting Up

Old 01-01-2015, 07:28 PM
Diesel Fan
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Default Speedometer Acting Up

With the onset of Winter and the cold weather we found that the speedometer does not work properly.
It reads about 20mph low until we drive about 20-40 miles. I can tell when it starts working as it jerks or jumps up a couple mph closer to our actual speed. Once it starts working properly its good for the rest of the day.
Unfortunately the majority of our driving is 8-10 miles.

It's as if the grease in the cable is there someplace I should lube the cable?

Thanks all...
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