Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Good evening. First thing is to check and see if the voltage is fluctuating the same as the gauge says it is. This is done by connecting a multimeter to the battery and watching the voltage. If the voltage is fluctuating at the battery as well then it may be a problem with the alternator itself. If the voltage is steady then the gauge may be going bad. This is usually repaired by having the Instrument Cluster Repaired.
Yes that is correct. The cluster can be repaired. Parts can be found online to repair it yourself or many electronics repair businesses offer repair services as well.
No problem at all. I'm glad I could help. GM clusters are fairly simple to repair.
The alternator voltage is in the range it should be. You can try "loading" the alternator by turning the blower and A/C on high and turning the high beam headlights on. If the flicker becomes worse than you have a current problem from the alternator. If the flicker doesn't change than there is a probably a problem with in the cluster.
I apologize for the delay in responding. If the gauge is flickering as the rpm changes than it would seem to be a problem with the alternator itself. It should have steady current regardless of high rpms.