Electrical

Asked by 1968_Sept Feb 20, 2018 at 11:58 AM about the 2006 GMC Canyon SLE1 Crew Cab 2WD

Question type: Maintenance & Repair

2006 GMC Canyon 2.8 engine. My alternator went
bad causing me to drain my battery to almost zero.
Replaced battery and alternator. But now when I
start the engine cold the interior lights blink on and
off and radio HVAC and lights go off until engine
warms up usually around 2 to 3 minutes. Then
everything comes back on and works normally. On
very cold days if I run the heater too much and the
engine cools below normal the interior functions
go away again. Does anybody have any
suggestions?

2 Answers
26,800

oilyspill answered 6 years ago

Maybe the bcm needs to be reprogrammed? Sometimes when battery voltage is lost, some modules may need to relearn or be reprogrammed? I don't know if bcm would relearn on it's own? Could be other issues?

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