Re: Alternator problem on 2021 GMC Terrain
Anybody can put a volt meter on the battery or alternator to check voltage. But when you are having problems like you have the system needs to be loaded at different RPMs to be properly tested. Iam thinking the tech may not have tested the charging system under the correct conditions. Did you have the alternator shop test the charging system. The alternator can have diode problems causing these symptoms.
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