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Prev Professional Automotive Repair Technical Discussions for December 18, 2020
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2001 Chevrolet Silverado 2500 HD 8.1L Speedometer odometer VIN: 1GCHK23G31
Customer stated after vehicle sat for week speedometer reading 30 miles per hour sitting still. I recheck and even downloaded and reflashed both pcm and tcm. No change. Speedometer seems to follow tach. Pids show cluster vss at 26 miles per hour sitting st...
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