09/02/2026
2009 Chevy Avalanche 5.3L
Alternator replacement, on this vehicle there was a surging on the vehicle also the a/c was blowing cold air sometimes, I feel like when the clutch was engaged the surging was in sinc with it. We did preform an alternator output test with the OBDII scanner and it was putting out 12.89 volts idling, under load it would go up to 13.2v.
We have a new alternator we are going to install to bump up the output to 13.4 and higher.
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