GM 6.5L Diesel Won’t start Again

GM 6.5L Diesel Won’t start Again

This is Part 3 you can catch up.
Part 1: GM 6.5L Diesel Stalling, now Won’t start.
Part 2: GM 6.5L Diesel Stalling, Won’t start. – Now FIXED in 10mins

I fixed the won’t start issue months ago and the truck was running fine. Now I go out to start it up and it won’t start. I can hear the lift pump running, but it sounds diffrent and runs for longer than normal.

I figured with over 300,000 miles I should replace the lift pump anyway. The local parts place had it in stock for about $50, but I am still not sure what is wrong.

I wait till the weekend and try the truck again. it starts for a second, but then dies. I also don’t hear the lift pump anymore.

I install the new lift pump, and after a few times bleeding the fuel system the truck fires right up. Runs great.

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5 thoughts on “GM 6.5L Diesel Won’t start Again

  1. I have a 1994 chevy with the 6.5 that starts when the engine is cold,after a while it dies.sometimes its hard to stared again,sometimes it runs fine.i replaced the fuel today and the same thing,about 2 month ago i replaced the pmd and relocate it to away from the pump with a cooler and im still having problems. need some expert advice.thanks

  2. I am having the same problem. I have replaced the PMD only 10 days ago and today it starts and keeps stalling. In 3 minutes stopped running 5 times. I am sorry I can not help you. Please if you find the problem send me an email.
    If I find the solution I will contact you.
    Thanks.

  3. i have 1992 checy 3500 with 6.5 diesel and truck will start cold but not whan is hot light for glow plug is on only whan is cold nothing coms on whan is hot turns over but no start

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