building a engine trans set up - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kglowacky · 03-25-2022, 04:12 PM

My last build I bought my LS1 and 460E together complete with pcm and harness (drop out). I have a chance to buy a ls1 Engine only (no harness or PCM) out of a 02 Camero at a good price. How complicated is it to get a trans and harness and pcm to make it as a Dropout that is as easy as the dropout to install in my new project or is it still better and safer to by a drop out complete. I assume the corvette LS1 motors would be the same. Are the PCMs different for every app. or are they standard with all LS1.

LS short box · 03-25-2022, 04:45 PM

As far as I know all LS1/4L60E ecms are the same. On my LS swaps I buy the harness and ecm from the same supplier. I like Speartech and Howell. Buy from one place so if there is an issue you have one person to call.
You can give the supplier your engine trans combo, gear ratios, tire size and other details so they mod the ecm program to match.
That 02 LS1 will have the better LS6 intake.

**CarlsLQ9SS** · 03-25-2022, 08:44 PM

Something about the 98 LS1 computer and harness is different but I'm unsure what it is. Just be careful what you buy if you get only the engine.

03-25-2022, 04:12 PM	#1
kglowacky Registered User Join Date: Mar 2020 Location: The Woodlands,Tx Posts: 588	building a engine trans set up My last build I bought my LS1 and 460E together complete with pcm and harness (drop out). I have a chance to buy a ls1 Engine only (no harness or PCM) out of a 02 Camero at a good price. How complicated is it to get a trans and harness and pcm to make it as a Dropout that is as easy as the dropout to install in my new project or is it still better and safer to by a drop out complete. I assume the corvette LS1 motors would be the same. Are the PCMs different for every app. or are they standard with all LS1.

03-25-2022, 04:45 PM	#2
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 2,136	Re: building a engine trans set up As far as I know all LS1/4L60E ecms are the same. On my LS swaps I buy the harness and ecm from the same supplier. I like Speartech and Howell. Buy from one place so if there is an issue you have one person to call. You can give the supplier your engine trans combo, gear ratios, tire size and other details so they mod the ecm program to match. That 02 LS1 will have the better LS6 intake.

03-25-2022, 08:44 PM	#3
CarlsLQ9SS Senior Member Join Date: Aug 2018 Location: London, Ky Posts: 1,163	Re: building a engine trans set up Something about the 98 LS1 computer and harness is different but I'm unsure what it is. Just be careful what you buy if you get only the engine. __________________ Carl 1971 GMC short bed, (Henry) Options I've added, tilt, ac, 8k tach, Electric speedometer conversion for LS swap, 6.0 with 823 heads and BTR stage 4 truck cam, 4L80e, posi with 3.73 rear end, Power steering and power brakes Lowered 5/7. Frame up build.



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