2006 chevy 2500 HD duramax won't crank intermittently. Heater fan won't blow at the same time.

Asked by May 26, 2017 at 06:06 PM about the 2006 Chevrolet Silverado 2500HD LT1 4dr Crew Cab LB

Question type: Maintenance & Repair

While it is running the heater fan quits working and the brake light and abs
light comes on. If I shut it off like this it will not crank over. All the gauges and
dash lights power up like they are supposed to until I turn the key to crank and
they all lose power until I let the key go back to run position and they power
back up. This happens hot or cold. Been at the dealer for a month. Been going
on for 8 months intermittently. New batteries, cleaned ground to frame.

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