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#1 |
Registered User
Join Date: Feb 2009
Location: Hampton, GA
Posts: 76
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Do I need a computer with a 5.3L GEN III?
I'm going to purchase a 5.3L engine out of a 06 Silverado, but the computer (ECU) doesn't come with the motor. The motor has everything else like the throttle body, fuel injectors, harness, etc. I'm going to install this motor in a 72 Chevy Cheyenne pickup. Do I need to purchase a computer? If so, where do I get the computer and where do I get it programmed?
Thanks, Your help would be greatly appreciated. ![]()
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![]() 1972 Chevy Cheyenne LWB 350 engine TH400. |
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#2 |
1965 Chevy C10, 2005 4.8L/4l60
![]() Join Date: Aug 2004
Location: DFW Texas
Posts: 8,543
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Re: Do I need a computer with a 5.3L GEN III?
Yes you will, if you keep the FI. the link will answer everything.
http://67-72chevytrucks.com/vboard/s...d.php?t=377348 try this link dude lots of info.
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Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 ![]() ![]() ![]() support our troops! |
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#3 |
Senior Member
Join Date: Aug 2002
Location: Valley Center KS
Posts: 3,525
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Re: Do I need a computer with a 5.3L GEN III?
I depends:
There are ways to make a 5.3L carborated and put a distributor in it. But that set up gets spending and IMO defeats the benefits of running a new engine. Assuming you want to keep the fuel injection and the distributorless ignition, then yes you need the ECM. There are many ways to go about getting a computer and tune. I would suggest you do a lot more reading on here and LS1tech to educate yourself on what options are out there, what others have done to make your own decision. Good luck! |
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#4 | |
Registered User
Join Date: Feb 2009
Location: Hampton, GA
Posts: 76
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Re: Do I need a computer with a 5.3L GEN III?
Quote:
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![]() 1972 Chevy Cheyenne LWB 350 engine TH400. |
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#5 |
Registered User
![]() Join Date: Jul 2006
Location: Ozark, MO
Posts: 4,887
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Re: Do I need a computer with a 5.3L GEN III?
find a pcm from the wrecking yard or ls1tech.com, performancetrucks.net, or buy it from the a tuner like wait4meperformance since you will have to have it tuned anyways. (if your keeping FI) Going rate is about $100.
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'20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids
Last edited by LEEVON; 12-23-2009 at 10:03 PM. |
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#6 |
Registered User
Join Date: Feb 2009
Location: Hampton, GA
Posts: 76
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Re: Do I need a computer with a 5.3L GEN III?
Thanks. I'm going to purchase the motor. I can't wait to drop it in.
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#7 |
Registered User
![]() Join Date: May 2005
Location: Morristown, Tn
Posts: 275
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Re: Do I need a computer with a 5.3L GEN III?
The computer and harness and if its a drive by wire the pedal assembly and tac module should come with the engine. you want be able to make it run with out them. you will need to get the computer re-maped and a harness made up or the old one re- worked. also need the mass air sensor and O2 sensors.. good luck
Last edited by 1lo67; 12-24-2009 at 09:53 AM. |
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#8 |
Registered User
Join Date: Dec 2006
Location: Braselton, GA
Posts: 245
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Re: Do I need a computer with a 5.3L GEN III?
Good luck with this swap. I just like finishing mine, but cant wait to drive again. Start a build thread so we all can see your progress.
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#9 | |
Registered User
Join Date: Feb 2009
Location: Hampton, GA
Posts: 76
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