GM 6.5L Diesel Stalling, now Won't start.

GM 6.5L Diesel Stalling, now Won't start.

This is Part 1, you can read more here.
Part 2: GM 6.5L Diesel Stalling, Won’t start. – Now FIXED in 10mins
Part 3: GM 6.5L Diesel Won’t start Again

One of my Vehicles Currently in my stable is a 1994 GMC 2500 6.5l Turbo Diesel.  It has about 300,000 miles on it.  The truck is on loan to be from my father, (Thanks Dad).

A few weeks ago it started stalling right after start up.  After starting and stalling a few times it would run fine.
Last week it started stalling while I was driving
This weekend it would not start.

I went to google what could be wrong. What did I find?
Basically the GM 6.5l Diesel has this issue with stalling.  It can be one of several issues, but it is most likely the PMD (Pump Mounted Driver).

The Lift Pump is working and I am getting fuel out of the T fitting. So I placed my order for a new PMD and relocation Kit.  it should come in this weekend and I should get the truck running.  I will share how things work out.

Want Better Fuel Mileage for your 6.5L Diesel? Read this

13 thoughts on “GM 6.5L Diesel Stalling, now Won't start.

  1. did the remote mounted PMDsolve the stalling problem?
    I have a 95′ 6.5 with the same ongoing problem
    how difficult was the install?

  2. Hello, I’m wondering if that solved your problem with it stalling. I’m having the same problems with my 96 1500 6.5l turbo. Stalling at start up and while driving. Started yesterday, this afternoon it started fine. Please let me know what happened with your truck. Thanks

  3. my 95′ 2500 has the same problem too, where did you order the PMD and relocation kit? was it expensive? right now I’d pay just about anything to get rid of this annoying problem.

  4. I have a 1994 2500 chevy 6.5 turbo diesel with 197,000 miles on it. I replaced the injector pump , PDM box, replaced all glo plugsand installed two new batteries and also the lift pump. The engine turns over fast but won’t even try to start.

    Please help. Thansk Ken

  5. i have a 99 6.5L turbo q-van, i just installed a new fuel filter, fuel injection pump and a pmd kit, but it won’t start. it does not even want to start at all, the batteries are just put brand new as well and they crank the engine good.

  6. I have a 94 GMC with 165,000 miles on it and it stalled this weekend on the interstate. I have fuel up to the filter housing but no fuel to the injectors just wondering if there was an easier fix then buying a new injection pump? Any help i can get would be wonderful.

  7. ok i have a 96 2500 hd gmc 4×4 and a 94 gmc 3500hd 4×4 w 6.5’s ive had some issues but if it qiuts and starts back up its most likley a pmd and if u replace it leave the stock one on the pump and buy a new one with a heat sink and 6 foot extension harness and mount that bad boy in the front bumper. if it wont start and u replaced pmd lift pump batteries fuel filter any of these its either a oil pressure switch because it powers the lift pump and is located in back passenger side of block it will also cause sputtering spirattic idle and chugging under heavy load of rpm.also possible is fuel cutoff switch sticks and will not allow fuel into injector pump.u can test bu disconnecting connector and running a jumper between prongs on ops switch w power on and listen for lift pump if no pump = bad switch hopefully helpful i worked for gmc for a while before becoming a jet mechanic.

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