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Old 01-23-2022, 08:56 PM   #1
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95chev-w/t-guy's Avatar
Join Date: Aug 2012
Location: Swan Creek, New Brunswick
Posts: 94
1995 K2500 LQ4 swap

OK, so I have this rusty old 1995 GMC K2500, the engine is toast (headgaskets and overheated a few times, and sounds like it's knocking). I was going to sell it for parts at first, but I just got an amazing deal on a southern box that has me rethinking what I want to do with it. Here's the thing, I have an LQ4/NV4500 from a 2wd 2001 2500HD sitting in my garage. I already have other plans for the NV4500, but that leaves me with the LQ4. Immediately after I found this southern box it dawned on me "put the LQ4 in the K2500". I've never done an LS swap before, but I've been toying with the idea and doing some reading and it doesn't seem that bad. 96-98 fuel pump, corvette regulator/filter, reworked stock or painless harness, engine mounts, etc. My 95 doesn't have cruise control or A/C, and I don't need it. I'm assuming the 4L80E in my 95 will already work with the LQ4. My first question is, the flex plate and torque converter, will I need parts from a newer truck, will the parts from the 95 work, a combination of both, aftermarket, or is it all the same? Considering I have most of the major parts required in my garage already and have basically nothing into this so far, I don't mind spending a little on doing things correctly, so long as I won't need a 2nd mortgage to pay for it Here's the truck.

P.S. the engine is complete with accessories and I drove the truck it came from. I also have the original harness up to the firewall, the computer, factory fuel lines back about 3 feet, etc.
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1984 c10 - my forever truck
1991 GMC R2500 6.2 Diesel
1995 GMC K2500 LQ4 swap coming soon
2002 2500hd cclb LQ4/NV4500 2wd - parted out
1998 c1500 - sold for parts
1995 c1500 - sold to my brother, then sold again but still going

Last edited by 95chev-w/t-guy; 01-23-2022 at 10:20 PM. Reason: Spelling
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Old 01-27-2022, 11:53 AM   #2
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Join Date: Jul 2002
Location: Gulfport, MS USA
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Re: 1995 K2500 LQ4 swap

It should be a really good combo and these trucks are well worth the effort of keeping them on the road. Looking forward to seeing your progress.
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Old 01-27-2022, 03:29 PM   #3
Ol' Drippy
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Join Date: Apr 2012
Location: Falls Church Va
Posts: 73
Re: 1995 K2500 LQ4 swap

I don't think the LQ4 factory computer will be able to control the 95 4L80e. You will be able to bolt them together though, they make a little spacer to connect LS engines to older transmissions.
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