Alternator problem on 2021 GMC Terrain

Kirk Morgan · 01-15-2024, 11:18 AM

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.

01-15-2024, 11:18 AM	#7
Kirk Morgan Member Join Date: Jan 2009 Posts: 230 Likes: 1 Liked 80 Times in 44 Posts	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.