Re: 2010 GMC Terrain power/battery issues after engine replacement
There is a problem with the charging system. The computer controls the voltage and output of the alternator, and I would be willing to bet there is a problem with the wiring for the control circuit that controls the alternator. I have seen a pinched control wire for the alternator cause an intermittent loss of charging and cause the service charging system to display. I would look there first, then I would also do a charging system test to see if it is working properly and also load test the battery.
2011 Equinox 1LT 3.0 LFW HFV6 (Always Looking Clean)<br />1999 Camaro Z28 5.7 LS1 V8 (Garage Queen)<br />2009 Malibu 1LT 2.4 LE5 (Daily Driver)<br /><br />GM High Feature V6 Master Technician