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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> General Rodding Tech> 1995 GMC 6.5L diesel/3500 series
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Topic Review (Newest First)
11-30-2011 01:05 AM
bentwings I think you are in for probems with this truck. Getting something that has problems is setting yourself up for continuous problems. I'd try to move up to a Dodge Cummins Turbo Diesel. A 12 valve of about the same vintage would be hard to beat. Go with a 5 sp manual trans. It's much easier and cheaper to repair a clutch or man. trans than the auto. The 12 valve has mechanical injection that is very easy to service and to adjust for more power if you need it. Plus they start in the winter.

I've got 270k on my 24 valve with minimum problems. It would pull 15k very easily. My own trailer weighs 12k and I pul it easily and get 13-15 mpg with it.
11-29-2011 04:23 PM
Rhansen a motor swap crossed my mind but the timing is no good - new shop is still under construction....
11-29-2011 02:50 PM
matt167 you could bolt a SB/BB with a carb in and change the fuel system. the 6.5's in '95 had quite a few problems.

those trucks are also perfect candidates for Cummins conversions. The dodge bell, few other parts and your there. depends on what your boss wants. it could be worth it, but expect to spend upwards of $2k on repairs
11-29-2011 02:40 PM
Rhansen I was reading threads on dieselplace (and others) before I even posted here. It's too bad you have to register there to use the search function. I did quite a bit of research since having this thrown in my lap yesterday. Was hoping for a few quick replies from people familiar with them. Never hurts to try.

Everything I've heard and read says this truck isn't going to be worth the effort.
11-29-2011 09:37 AM
against all odds i think rear diff gear is the key to determine wether it can handle that load, but yeah the diesel place site would be a good one to go to.
11-29-2011 08:33 AM
6.5 diesel engine.......

Go to DIESEL PLACE.COM,theres all the info on this truck and engine you will ever need...
11-28-2011 04:51 PM
1995 GMC 6.5L diesel/3500 series

Looking for some feedback on these trucks. The boss is looking at buying one to tow our approx. 15,000 probe rig/trailer.
The truck he is looking at supposedly needs an injection pump and has the wrong pcm (truck is a manual trans and pcm is for an auto). Has 150K miles on it with kingpins replaced 30k mi. ago, new clutch 4k miles ago. They're only asking $1500 for it.
Was wondering if this truck will have adequate power for the mentioned load and if there are any 'red flag' reliability issues with these in general.

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