My tachometer stoped working what doyou think is wrong?
How can I fix it on 2003 Chevrolet Silverado 2500 HD

all other gauges work

Asked by for the 2003 Chevrolet Silverado 2500 HD
Vehicle Application: 2003 Silverado 2500 HD 6.0

Customer Concern: Tachometer does not work right all the time, same with the speedometer.
Tests/Procedures: 1. Check the other gauges. If they also do not work right, check the data line and power/ground to the cluster.

2. If the other gauges are OK and the scanner shows good speed and RPM readings send the cluster out for testing.
1 more answer
Common problem. The fault lies in the instrument cluster. They can be repaired here: