2011 GMC Sierra shutting off after 20 or so min of idle

Horace Jackson

Asked by Jun 26, 2016 at 09:10 PM

Question type: Maintenance & Repair

After idling for about 20 to 30 min my Sierra will
discharge and shut off. If I try to crank it I have
nothing like completely dead. If I wait just 15
seconds it cranks with no problem. The battery
does not act weak or anything. What could my
problem be?

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