Speedometer or Other Instrument Panel Gauge May Work Erratically on Chevrolet Silverado 3500

The speedometer or other instrument panel gauge may begin to work erratically at times. Our technicians tell us that the instrument cluster must be sent to a repair facility to correct this fault. The warranty has been extended on some of these units to 7 years or 70,000 miles.

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Average mileage: 112,750 (90,000–127,000)
3 model years affected: 2003, 2004, 2005
7 people reported this problem
4 people shared problem details
Oil pressure gauge goes beyond the max reading under normal driving conditions. It does not return to zero when engine shuts off but, only returns to 129psi reading. Oil level & oil pressure are good
Cluster replaced and still having issues.
Took to dealer to have it repaired twice.
Insttrument cluster causing coolant temperature to stay stuck at 260. Doesn't have code for overheating showing nor does it have any other signs of overheating, checked with pyrometer. Lower hose is cooler than upper house but both are within range
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