P0626 GMC Generator Field Terminal Circuit High
Possible causes
– Faulty battery
– Generator drive belt missing or loose
– Faulty Generator
– Generator harness is open or shorted
– Generator circuit poor electrical connection
– Generator drive belt missing or loose
– Faulty Generator
– Generator harness is open or shorted
– Generator circuit poor electrical connection
Tech description
If the battery is OK then the alternator is more than likely the problem.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0626 GMC Description
The ECM has detected a fault on the generator field circuit
GMC Vehicle:GMC Acadia,GMC Canyon,GMC Envoy,GMC Savana 1500,GMC Savana 2500,GMC Savana 3500,GMC Sierra 1500,GMC Sierra 2500 HD,GMC Sierra 3500 HD,GMC Terrain,GMC Yukon,GMC Yukon XL 1500,GMC Yukon XL 2500,