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Got low battery notice . GMC dealer found battery bad, would not hold charge. 41,500 miles 32 months.
New ACDELCO type 49 AGM 950 CCA. When I check the voltage across the battery terminals with an accurate digital voltmeter first thing in morning new battery reads 12.2 to 12.4. Engine starts . It has been driven 500 miles at highway speeds. Drivers Information Screen Shows 14.5, 13.8 etc when driving, alternator appears to be working. Dealer removed battery and tested it with fancy GM battery tester that that shows battery is good ? One weird thing dealer apparently removed battery without connecting 12 volt soorce to OBII connector to keep computer memory intact. I know this because oil life and fuel filter life reset back to 100%
What voltage does anyone get on yours?
New ACDELCO type 49 AGM 950 CCA. When I check the voltage across the battery terminals with an accurate digital voltmeter first thing in morning new battery reads 12.2 to 12.4. Engine starts . It has been driven 500 miles at highway speeds. Drivers Information Screen Shows 14.5, 13.8 etc when driving, alternator appears to be working. Dealer removed battery and tested it with fancy GM battery tester that that shows battery is good ? One weird thing dealer apparently removed battery without connecting 12 volt soorce to OBII connector to keep computer memory intact. I know this because oil life and fuel filter life reset back to 100%
What voltage does anyone get on yours?