I have a 2005 Pace Arrow The battery light keeps FLICKERING ON/OFF .while driving Have taken the battery to two diff. places for the load test, both said no problem there battery post and wires ha...
try checking the battery voltage with it running, headlights on heater , etc and see, it should be between 13.5 and 14 is good,, have seen thought some GMs use a current sensor on the + battery lead, if you don't use a proper GM battery it messes with the sensor and the computer alt light... should be something like this on the + battery cable