GEN III 5.3L Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BAGNDRAGIT · 06-24-2011, 10:38 PM

alrighty, got a good one for you all,

ok so looking at doing the gen 3 swap, have an 01 motor and ecm, need the harness. have a guy here in town with an 07 (i believe) harness and pcm. will this work on my 2001 motor?

i know the pcm pinouts are different, but i dont know if all the connectors are the same..

thanks in advance.

oh and any advice on the gen 3 swap would be awesome, i have alot of it scienced out but i am alweays ope to suggestions... thanks!

usmcchevy · 06-24-2011, 11:19 PM

Can it be done yes, but if you have a 01 motor with the cable type throttle body, the easiest is to get a 99-02 harness and computer. After 02 there are quite a few changes in connectors and they went to drive by wire(DBW). In my sig there is a link to the LSx FAQ, lots of good reading.

BAGNDRAGIT · 06-24-2011, 11:30 PM

well i wouldnt be considering it but the guy is selling me alot of parts for a cheap price and its very tempting. i know dbw can be converted dbc, so thats not the issue, i am more concerned with the connectors and such like you stated...

usmcchevy · 06-24-2011, 11:46 PM

Off the top of my head, O2s, Alternator, MAF connectors and then the TPS/IAC vs. DBW with the TAC. Also being it is a 07 it may use separate engine and trans computers with the 58x reluctor wheel on the crank. Even if you get it cheap, I would sell/trade it for a older harness.

ls1nova71 · 06-25-2011, 03:38 AM

Quote:

Originally Posted by usmcchevy

Off the top of my head, O2s, Alternator, MAF connectors and then the TPS/IAC vs. DBW with the TAC. Also being it is a 07 it may use separate engine and trans computers with the 58x reluctor wheel on the crank. Even if you get it cheap, I would sell/trade it for a older harness.

^^^^^ What he said. The 2007 PCM wont have IAC drivers in it to work with DBC. Find a '99-'02 harness and a 411 PCM and save yourself ALOT of headaches.
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BAGNDRAGIT · 06-25-2011, 10:10 AM

Quote:

Originally Posted by usmcchevy

. Even if you get it cheap, I would sell/trade it for a older harness.

this is what i was thinking...yeah sounds like its not worth the hassle. im gonna buy it and trade/sell it for the correct one, make it easier...

thanks for all the input!!

1mouse3 · 06-24-2011, 11:38 PM

I'd say go for it, to me dbw would be easier than mods for a cable. and swap throttles and sensors

Ackattack · 06-25-2011, 07:43 AM

Yeah, its just not worth the hassle.

eurospec1 · 06-25-2011, 08:09 AM

Yep don't do it, like they said the comp will not work with a cable TB, Cable throttle body's have iac valves to control idle, that newer computer does not have the hardware to control an iac valve

06-24-2011, 10:38 PM	#1
BAGNDRAGIT Just Not Low Enough! Join Date: Mar 2009 Location: Phoenix, AZ Posts: 525	GEN III 5.3L Question alrighty, got a good one for you all, ok so looking at doing the gen 3 swap, have an 01 motor and ecm, need the harness. have a guy here in town with an 07 (i believe) harness and pcm. will this work on my 2001 motor? i know the pcm pinouts are different, but i dont know if all the connectors are the same.. thanks in advance. oh and any advice on the gen 3 swap would be awesome, i have alot of it scienced out but i am alweays ope to suggestions... thanks! __________________ NEED ELECTRICAL HELP? ASK ME! 67-72 Full Wiring Diagrams Lots Of Info, TAKE A LOOK 1967 Chevy C-10 Shortbox Bagged 327 4spd Previous: 1971 Chevy C-10 Short Sep I6 Auto (Traded) 1973 Chevy C-20 THE REDNECK BATTLE TRUCK 2001 Chevy Silverado 2Dr 5.3L Shortbox. R.I.P. 1969 Volkswagen Bug This is my first meeting, I have a horsepower problem.

06-24-2011, 11:19 PM	#2
usmcchevy Has more rust than truck... Join Date: Apr 2005 Location: Ivanhoe, MN Posts: 2,421	Re: GEN III 5.3L Question Can it be done yes, but if you have a 01 motor with the cable type throttle body, the easiest is to get a 99-02 harness and computer. After 02 there are quite a few changes in connectors and they went to drive by wire(DBW). In my sig there is a link to the LSx FAQ, lots of good reading. __________________ 1972 Custom/10 SWB, 4.8/4l80e Build thread LSx Swap FAQ index

06-24-2011, 11:30 PM	#3
BAGNDRAGIT Just Not Low Enough! Join Date: Mar 2009 Location: Phoenix, AZ Posts: 525	Re: GEN III 5.3L Question well i wouldnt be considering it but the guy is selling me alot of parts for a cheap price and its very tempting. i know dbw can be converted dbc, so thats not the issue, i am more concerned with the connectors and such like you stated... __________________ NEED ELECTRICAL HELP? ASK ME! 67-72 Full Wiring Diagrams Lots Of Info, TAKE A LOOK 1967 Chevy C-10 Shortbox Bagged 327 4spd Previous: 1971 Chevy C-10 Short Sep I6 Auto (Traded) 1973 Chevy C-20 THE REDNECK BATTLE TRUCK 2001 Chevy Silverado 2Dr 5.3L Shortbox. R.I.P. 1969 Volkswagen Bug This is my first meeting, I have a horsepower problem.

06-24-2011, 11:46 PM	#4
usmcchevy Has more rust than truck... Join Date: Apr 2005 Location: Ivanhoe, MN Posts: 2,421	Re: GEN III 5.3L Question Off the top of my head, O2s, Alternator, MAF connectors and then the TPS/IAC vs. DBW with the TAC. Also being it is a 07 it may use separate engine and trans computers with the 58x reluctor wheel on the crank. Even if you get it cheap, I would sell/trade it for a older harness. __________________ 1972 Custom/10 SWB, 4.8/4l80e Build thread LSx Swap FAQ index

06-24-2011, 11:38 PM	#7
1mouse3 Registered User Join Date: May 2011 Location: st louis Posts: 14	Re: GEN III 5.3L Question I'd say go for it, to me dbw would be easier than mods for a cable. and swap throttles and sensors __________________ 71 f250 cs 390ci t18 33s "under construction" 69 custom/10 307 a/c 8 track will be tbi had 2 E36 325i's Last edited by 1mouse3; 06-24-2011 at 11:39 PM.

06-25-2011, 07:43 AM	#8
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,524	Re: GEN III 5.3L Question Yeah, its just not worth the hassle. __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index

06-25-2011, 08:09 AM	#9
eurospec1 Registered User Join Date: Jun 2011 Location: Green Cove Springs FL Posts: 194	Re: GEN III 5.3L Question Yep don't do it, like they said the comp will not work with a cable TB, Cable throttle body's have iac valves to control idle, that newer computer does not have the hardware to control an iac valve __________________ 68 SWB Fleet 383

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