Swapping from v6 to v8 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bodyman9174 · 05-28-2017, 10:33 PM

Hey all is it possible to use the ECM and engine wiring from a 94 c1500 in a 95 c1500? Will the air bag still work? And what about the ABS Are them separate from the engine ECM ? Little lost here I'm trying to put a 94 305 and trans into a 95 that had a 4.3. Or could I just use the V8's ECM? I have read that I will burn up the trans. But I have also read that I will just get check engine light on.Man I hate all this computer crap.. I need to stick to body and paint easy.
Any help would be great.

**Palf70Step** · 05-31-2017, 08:10 AM

Wish I could answer your questions. Hopefully one of the better tech guys can give you an answer.

bodyman9174 · 05-31-2017, 09:32 PM

Quote:

Originally Posted by Palf70Step

Wish I could answer your questions. Hopefully one of the better tech guys can give you an answer.

Thanks me to i think I'm just going to put the 94 PCM in there and hope for the best

rickpilgrim · 06-07-2017, 11:27 AM

I was told by my trans rebuild shop when I was contemplating the 98 5.7 swap that our 96 S10 with 4.3/4l60E/4wd 3.42 would need the complete ecm and wiring from the 98 5.7 plus a k1500 4l60e to make it work as the 4.3 has some pressure control on the trans that the v8 trans does not.

bodyman9174 · 06-07-2017, 09:52 PM

Quote:

Originally Posted by rickpilgrim

I was told by my trans rebuild shop when I was contemplating the 98 5.7 swap that our 96 S10 with 4.3/4l60E/4wd 3.42 would need the complete ecm and wiring from the 98 5.7 plus a k1500 4l60e to make it work as the 4.3 has some pressure control on the trans that the v8 trans does not.

i'm hoping with only 1 year different it will work.. I'm using the ECM motor and trans. All the wiring plugs in so hope to find out this weekend

91short · 06-07-2017, 11:32 PM

You want to use the ECM from the 4.3 on the 5.7? I think you'll need the V8 ECM but I'm not sure.

bodyman9174 · 06-08-2017, 12:33 AM

Quote:

Originally Posted by 91short

You want to use the ECM from the 4.3 on the 5.7? I think you'll need the V8 ECM but I'm not sure.

No I have the ECM motor and trans from the donor truck 94 305 V8. Put the motor in a 95 that had a V6. So going to use the ECM motor and trans From the 94.

05-28-2017, 10:33 PM	#1
bodyman9174 Registered User Join Date: Dec 2004 Location: south burbs of chicago IL Posts: 237	Swapping from v6 to v8 Hey all is it possible to use the ECM and engine wiring from a 94 c1500 in a 95 c1500? Will the air bag still work? And what about the ABS Are them separate from the engine ECM ? Little lost here I'm trying to put a 94 305 and trans into a 95 that had a 4.3. Or could I just use the V8's ECM? I have read that I will burn up the trans. But I have also read that I will just get check engine light on.Man I hate all this computer crap.. I need to stick to body and paint easy. Any help would be great. __________________ Cars i have done

05-31-2017, 08:10 AM	#2
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 46,640	Re: Swapping from v6 to v8 Wish I could answer your questions. Hopefully one of the better tech guys can give you an answer. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

06-07-2017, 11:27 AM	#4
rickpilgrim Registered User Join Date: Apr 2011 Location: Wausau, WI Posts: 591	Re: Swapping from v6 to v8 I was told by my trans rebuild shop when I was contemplating the 98 5.7 swap that our 96 S10 with 4.3/4l60E/4wd 3.42 would need the complete ecm and wiring from the 98 5.7 plus a k1500 4l60e to make it work as the 4.3 has some pressure control on the trans that the v8 trans does not.

06-07-2017, 11:32 PM	#6
91short Registered User Join Date: Oct 2014 Location: Hemet, CA Posts: 129	Re: Swapping from v6 to v8 You want to use the ECM from the 4.3 on the 5.7? I think you'll need the V8 ECM but I'm not sure.



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