Question about 1997 GMC Sierra

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1994 GMC Sierra 1500 6.5 diesel runs for awhile then stalls

Runs for a few hours then stalls can start it back up and sometimes will stay running. Already changed injection pump and timing is set correctly. I think something is heating up but don't know what.

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Check your pmd switch. i had mine changed and it runs great. the problem is that it gets too hot and burns it up. be sure to move the pmd swith on the firewall away from the injection pump.

Posted on Jun 19, 2009

  • Tbreeze78 Feb 17, 2011

    I put a new pmd switch on my 94 GMC 6.5 and moved it away from the engine and it will run a while and still stall at times and other times it will run for several days before stalling. When it does start stalling again, it will do it 10 to 15 times in a roll. The only thing that seems to help is to bleed the fuel each time then after a while it will stay running for days. Seems to do it more often when the weather is warm. What do you think this is?

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Posted on Jan 02, 2017

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