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03-03-2011, 03:46 AM | #1 |
69' Chevy Stepside
Join Date: Mar 2008
Location: Anchorage, Ak
Posts: 526
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How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Here's a pretty good video a friend and me made about doing my wiring harness for my 55' LS 5.3L swap that I'm currently working on. It shows how to disassemble the 1999-2002 Chevy/GMC 4.8L 5.3L and 6.0L truck wiring harness, how to remove the unneeded wires for certain things, redo the grounds, and finally convert it to a 4 wire hookup and package it back into a nice harness.
Part 1: Part 2: Part 3:
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-Matthew -69' Chevy Custom/10 Shortbed Stepside 2WD "Copperhead" - Restored, 6.0L LQ9 Built. L92 Heads and LS3 Intake with Comp Cam 223/231 .610/.617 112 LSA, 4L60E with Shift Kit and Circle-D 3200 Stall Converter ~Build Thread -1957 Chevy BelAir 2 Door Post Sedan, Full Frame off Restoration done myself - 6.0L with T56 six speed -1957 Chevy BelAir 2 Door Post Sedan - Nearly rust free AK car, Project in the waiting -2003' Chevy Silverado SS AWD 6.0L! - Daily Driver |
03-03-2011, 07:53 AM | #2 |
TruckincrazY
Join Date: May 2004
Location: Haslet, TX
Posts: 493
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Awesome, thanks!!
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My build thread - '84 2wd w/ a 6.0 swap http://67-72chevytrucks.com/vboard/s...d.php?t=433595 |
03-03-2011, 10:08 PM | #3 |
Has more rust than truck...
Join Date: Apr 2005
Location: Ivanhoe, MN
Posts: 2,421
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Nice work!
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03-03-2011, 11:15 PM | #4 | |
Senior Member
Join Date: May 2009
Location: Fort Worth, TX
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Quote:
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03-04-2011, 12:11 AM | #5 |
69' Chevy Stepside
Join Date: Mar 2008
Location: Anchorage, Ak
Posts: 526
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
What's wrong with running all the switched ignition wires together, they all do the same thing. It WILL have a fuse block that the main ignition on/off will run though and that the battery constant power wire will run though as well.
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-Matthew -69' Chevy Custom/10 Shortbed Stepside 2WD "Copperhead" - Restored, 6.0L LQ9 Built. L92 Heads and LS3 Intake with Comp Cam 223/231 .610/.617 112 LSA, 4L60E with Shift Kit and Circle-D 3200 Stall Converter ~Build Thread -1957 Chevy BelAir 2 Door Post Sedan, Full Frame off Restoration done myself - 6.0L with T56 six speed -1957 Chevy BelAir 2 Door Post Sedan - Nearly rust free AK car, Project in the waiting -2003' Chevy Silverado SS AWD 6.0L! - Daily Driver |
03-04-2011, 01:12 AM | #6 |
Senior Member
Join Date: May 2009
Location: Fort Worth, TX
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
The pcm feeds cant take more than 10-15 amps from a direct short to ground, Running the PCM,(8)Coils,(2)O2 heaters,(8)Injectors,& a MAF sensor on the same fuse is asking for trouble. What AMP fuse are you planning on using?
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03-05-2011, 05:18 AM | #7 |
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
NOT really the proper way to do it, why dont you show us something new or helpful and not just following what other websites recommend so you can get famous on you tube.
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03-05-2011, 06:07 AM | #8 |
69' Chevy Stepside
Join Date: Mar 2008
Location: Anchorage, Ak
Posts: 526
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Hey man, not trying to get famous just having fun with video editing. The reason I made the videos was to show people what was exactly involved in redoing a harness. As far as I know I have never seen any videos that show much about these harnesses and how to work with them. I now realize that we did do some things wrong and I should have separated out my positive wires so they can be fused separately as clinebarger pointed out. This was the first harness I did with all the wires together. Other than that what the heck did I do wrong? I've done a couple of these harnesses and never had a single problem.
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-Matthew -69' Chevy Custom/10 Shortbed Stepside 2WD "Copperhead" - Restored, 6.0L LQ9 Built. L92 Heads and LS3 Intake with Comp Cam 223/231 .610/.617 112 LSA, 4L60E with Shift Kit and Circle-D 3200 Stall Converter ~Build Thread -1957 Chevy BelAir 2 Door Post Sedan, Full Frame off Restoration done myself - 6.0L with T56 six speed -1957 Chevy BelAir 2 Door Post Sedan - Nearly rust free AK car, Project in the waiting -2003' Chevy Silverado SS AWD 6.0L! - Daily Driver |
03-05-2011, 05:11 PM | #9 |
*************
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Outstanding work and thanks for sharing!
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03-05-2011, 10:45 PM | #10 |
Registered User
Join Date: Aug 2009
Location: Lacombe, Alberta
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
I thought the videos were fantastic.
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03-06-2011, 12:10 AM | #11 |
BMW & ASE Master Certified
Join Date: Feb 2004
Location: Houston, Texas
Posts: 1,266
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
man, everyone does things different... i will pray for your when you have a wire grimlin... all of those splices is also asking for problems. If you were relocating the harness, why not just swap the wires from injectors and coils on the passenger side to the drivers side and vice versa.. the wire color wont be the same but you can make your own notes to the diagram for reference...
otherwise nice job for taking time to make a video . clint
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06-17-2011, 12:06 AM | #12 |
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Thanks for taking the time to do this. I did not know the pins could be pulled out like that. What I want to know Is on a 99-02 pcm what wires would you use to have the PCM control the electric fans I want to use.
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06-17-2011, 02:45 AM | #13 |
69' Chevy Stepside
Join Date: Mar 2008
Location: Anchorage, Ak
Posts: 526
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Look at the wiring diagram on LT1swap.com and see which wire is the fan 1 turn on or fan 2 turn on. On the 99-02 PCM sometimes only one of the pins is controllable so you would have to play around with it.
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-Matthew -69' Chevy Custom/10 Shortbed Stepside 2WD "Copperhead" - Restored, 6.0L LQ9 Built. L92 Heads and LS3 Intake with Comp Cam 223/231 .610/.617 112 LSA, 4L60E with Shift Kit and Circle-D 3200 Stall Converter ~Build Thread -1957 Chevy BelAir 2 Door Post Sedan, Full Frame off Restoration done myself - 6.0L with T56 six speed -1957 Chevy BelAir 2 Door Post Sedan - Nearly rust free AK car, Project in the waiting -2003' Chevy Silverado SS AWD 6.0L! - Daily Driver |
06-18-2011, 12:41 AM | #14 |
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Location: Calgary Alberta
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Cool Vids and thanks for sharing...........I'm a visual kinda guy so pics or vids really helps me.
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06-21-2011, 03:15 AM | #15 |
Registered User
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Ok now for my second question. I am running A/C with my swap. There are a few wires for the A/C out of the PCM. PIN 17, 43 0n red connector. do I remove these? I remember reading in I think Glocks build? that he just hooked the factory wiring from the factory A/C compressor to the 6.0 compressor? He said that some people were frying the A/C system by trying to use the PCM wires. Is this correct? I went digging and cant find where I read that.
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06-21-2011, 05:12 AM | #16 | |
69' Chevy Stepside
Join Date: Mar 2008
Location: Anchorage, Ak
Posts: 526
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Quote:
__________________
-Matthew -69' Chevy Custom/10 Shortbed Stepside 2WD "Copperhead" - Restored, 6.0L LQ9 Built. L92 Heads and LS3 Intake with Comp Cam 223/231 .610/.617 112 LSA, 4L60E with Shift Kit and Circle-D 3200 Stall Converter ~Build Thread -1957 Chevy BelAir 2 Door Post Sedan, Full Frame off Restoration done myself - 6.0L with T56 six speed -1957 Chevy BelAir 2 Door Post Sedan - Nearly rust free AK car, Project in the waiting -2003' Chevy Silverado SS AWD 6.0L! - Daily Driver |
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06-21-2011, 10:27 AM | #17 |
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Nice
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08-09-2011, 11:18 AM | #18 |
Still Learning
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Very nice video. Thank you for taking the time to make the series. I was just thinking you guys made it look super easy. Here is what I am starting with and didn't have a clue where to start.
So after reading on which wires "should" be on seperate circuits? I don't mind adding a fuse box. |
08-09-2011, 12:20 PM | #19 | |
69' Chevy Stepside
Join Date: Mar 2008
Location: Anchorage, Ak
Posts: 526
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Quote:
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-Matthew -69' Chevy Custom/10 Shortbed Stepside 2WD "Copperhead" - Restored, 6.0L LQ9 Built. L92 Heads and LS3 Intake with Comp Cam 223/231 .610/.617 112 LSA, 4L60E with Shift Kit and Circle-D 3200 Stall Converter ~Build Thread -1957 Chevy BelAir 2 Door Post Sedan, Full Frame off Restoration done myself - 6.0L with T56 six speed -1957 Chevy BelAir 2 Door Post Sedan - Nearly rust free AK car, Project in the waiting -2003' Chevy Silverado SS AWD 6.0L! - Daily Driver |
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08-09-2011, 12:49 PM | #20 |
Windy Corner of a Dirty Street
Join Date: Jun 2003
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Nice work but personally, the last thing on earth I would use on any LSX swap would be a factory GM takeout harness. The factory hecho en Mexico GM harnesses supplied by Delphi have plenty of wiring issues of their own (poor crimps, unprotected splices, etc ) even before molesting them. The 1999-2002 donor truck harnesses are getting old now where the wires are stiff and weather pack connectors are getting brittle from engine heat. If you live in the salt belt you can count on corrosion issues too. I wouldn’t touch one! A quality aftermarket harness from one of many suppliers would be the best $500 you could spend on a LSX swap.
But hey, if it works for you then all is good. Great job on the video though! Maybe someday you guys can move to Nashville and be hosts on TRUCKS! or HorsePower TV or one of those other car shows.
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Current vehicle collection: 1978 Chevrolet K10, 8.1L, NV4500, NP205 1989 Chevrolet Suburban, 8.1L, NV4500, NP241 1993 Chevrolet C1500 Sportside, TBI 7.4L, 4L60E 2001 Chevrolet K2500HD, Ext Cab, SWB, 8.1L, ZF 6 speed 2014 Chevrolet Impala LTZ 3.6L Vortec 8.1L because life is too short to tolerate underpowered vehicles
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08-09-2011, 02:45 PM | #21 | |
Still Learning
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Quote:
Also, I saw that you used an LS1 intake with truck accessaries on your vid. Did you have to modify the intake or change the water pump? I seem to recall there are some subtle differences that cause interference. |
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08-09-2011, 03:25 PM | #22 |
Senior Member
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Mcbassin start with this page and as you scroll down and he color codes what should be kept and what should/can be removed.
http://www.lt1swap.com/2000harness.htm Also on that page you can click on the year of the harness and it shows what each PCM pin does/where it goes to. Here is another way he shows color coded what needs to stay and what needs to go http://www.lt1swap.com/2004vortec_pcm.htm
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08-09-2011, 04:30 PM | #23 | |
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Quote:
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08-09-2011, 08:04 PM | #24 | |
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Quote:
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08-09-2011, 09:28 PM | #25 | |
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Re: How To Video, LSx Wiring Swap Harness, 99-02 Truck Harness: 4 Wire Hookup
Quote:
I work with new vehicles every day. These days hard part failures are pretty rare. Where the problems are always found is in the wiring where some lazy assembler at Delphi did a pizz poor crimp or splice. Factory wiring harnesses are terrible. The components are good….the assembly process is terrible. There is no way a 10 year old – 200K harness looks and feels brand new after that many engine bay hot soaks. I am not buying that one. Heck, you can’t hardly pull a weather pack connector off of a 5 year old vehicle without breaking off the locking tang. Somebody is going to be able to whittle this… To this? ..... I don't think so. This is not to blow holes in Matt's work. They did a great job. I just would not use a factory take out harness if it were me. If you can spare another $500-$700 get a new harness. You won't regret it!
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Current vehicle collection: 1978 Chevrolet K10, 8.1L, NV4500, NP205 1989 Chevrolet Suburban, 8.1L, NV4500, NP241 1993 Chevrolet C1500 Sportside, TBI 7.4L, 4L60E 2001 Chevrolet K2500HD, Ext Cab, SWB, 8.1L, ZF 6 speed 2014 Chevrolet Impala LTZ 3.6L Vortec 8.1L because life is too short to tolerate underpowered vehicles
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