Question about 1985 GMC K3500

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I have a 1993 GMC 6.5 Liter Turbo diesel and it started but now it will not turn over. The Batteries are still good...the alternator seems to be good. and i don't know what the problem would be. the one day i was sitting there starting it and it almost fired. i held it for a little more and it almost started again, i shut it ignition off and when i tried again it didn't do anything got any good solutions?

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What i think it could be you cooked off your starter or you burnt out your starter relay

Posted on Aug 12, 2008

  • Rebecca Rogers Jul 25, 2013

    we had the same thing happen to ours. "The PMD / FSD (Pump mounted driver) is by far the #1 cause of 6.5L no-starts (at least 90%). If your truck experienced random stalling like someone shut the key off before ultimately refusing to start again, the PMD is very likely the issue. Typically the random stalls caused by the PMD will become more frequent as the failure worsens. In the beginning stages of failure, the truck can be immediately re-stared while the vehicle is still rolling. As the failure progresses, you will have to wait longer and longer for the vehicle to re-start. To read more about PMD failure and the reccomended cure, our FSD heat sync kit, follow the links below: For those with more in-depth issues, proceed to follow through the no-start guide one step at a time. The PMD or Pump Mounted Driver will run you about $240 but check Ebay as you can get it for about $175 for the kit.

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SOURCE: 1989 gmc sierra 6.2 liter diesel hard start when hot

hi, i have seen this problem ten years ago twice, but i was dumbfounded by the answer. all details aside, I replaced the ecm, and never had the problem again with both of them. this repair was a recommended repair by the local truck depot in my town, they stated the ecm got hot along with the truck and it lost the injector sensor signal. now, don't take this solution and run with it, i haven't repaired a 6.2 diesel in ten years and i maybe off track completely. but at least maybe you could ask around your town or maybe a large truck facility about this. of course, you should take to a shop to have diagnosed. hope i could help.

Posted on Jun 07, 2010

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