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Old 12-03-2017, 03:14 PM   #19
Eddie H.
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Join Date: Mar 2001
Location: Paradise TX USA
Posts: 1,200
Re: 1972 GMC Sierra c2500, electric

This was a common problem with GM trucks in the 70's and 80's. It was caused by excessive exhaust heat. When I was working at a Chevy dealer , GM had a service bulletin that had us install a heat shield, along with a different solenoid and spring.
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