2003 Vortec 5.3L Wiring Harness Rework Part 1

Автокөліктер мен көлік құралдары

This will be my first video of three parts, going over the harness rework steps for a 2003 5.3L vortec engine. In part 1, I will depin unused wires from the PCM as well as identify wires that will be used in the fuse block, or connected elsewhere in the target vehicle. This process will be nearly identical for any 2003-2007 Gen 3 engine with electric throttle control, with 4L60E or 4L80E trans. For more wiring details, please visit my website, www.lt1swap.com
Download Printable PDF Files of the pin outs I use from my website here:
www.lt1swap.com/1999-02pcmpino...
www.lt1swap.com/2003-07pcmpino...
www.lt1swap.com/2003to2007sche...

Пікірлер: 279

  • @michaelwittke8336
    @michaelwittke83362 жыл бұрын

    Thank you for not cutting this short. You were kind and decent enough to provide this information, I (for one) am more than happy to view it in its entirety

  • @derekhansen6652
    @derekhansen66525 жыл бұрын

    Your site has been such a huge help for so many peoples swaps, I feel like you have had a profound effect on the ls base popularity, even if they are plentiful at junkyards and reasonably priced.... They aren't any good without the electrical side which is everyones weakpoint, except yours😎. Keep up the awesome work you are doing to help the car guys out there. and thanks

  • @Good-Enuff-Garage
    @Good-Enuff-Garage5 жыл бұрын

    ah yes the hands of the LS Swap god at work

  • @miatajackdiy4293
    @miatajackdiy42932 жыл бұрын

    I sent an email with a question to Brandon and he got back to me, I can't believe with all he's got going on that he could actually find the time to respond. I didn't want to send an email back saying 'thanks' because it would be just another email for him to open. So I'll say it here...Thank you Brandon. I'm doing a Ls swap Miata and needed to delete the transmission wiring. My L33 5.3 aluminum block is an '05. He explained that on the pin-out for '99 - '02 he has the transmission delete highlighted in red. Same engine basically but I didn't check...lol.

  • @frederickwalton8410
    @frederickwalton84106 жыл бұрын

    This is great!!! I'm doing a 5.3 LS 4L60E 2WD swap to a '84 ElCamino using a '03 5.3 LS with DBW. These vids are going to make the job a shit ton easier. I can pretty much follow along bieng in "real time" . I've used his info in the past and it is Rock Solid!!! Thanx again Brendan

  • @jimekrut
    @jimekrut4 жыл бұрын

    Amazingly detailed and informative. Thank you for talking through and demonstrating the modifications!

  • @ls87gbody
    @ls87gbody5 жыл бұрын

    Best most informative, detailed and to the point ls wiring video on the tube! Thank you sir for taking ypur time to do this video and share it with us.

  • @glenncattani4843
    @glenncattani48433 жыл бұрын

    I've been referencing your site for years and never noticed the youtube links or vids. Great stuff. Great resource!!! Thanks.

  • @Markstarscoobs
    @Markstarscoobs4 жыл бұрын

    Followed your guide and wow it was simple at first it didnt make sense to my brain but I trusted the process and an hour later I'm almost done and cleaning it up. Thanks

  • @7beast298
    @7beast2982 жыл бұрын

    I love this guy! Built my first ls swapped project with just your info on your site about 5yrs ago and you kick ass man glad u have videos now 💪🤙

  • @mojojojo3361

    @mojojojo3361

    2 жыл бұрын

    I’m up now learning lol!

  • @spaghetts
    @spaghetts4 жыл бұрын

    Used the pinout sheet you made for the 1999-2002 harness yesterday, thanks so much for the info!!

  • @mattbengry7460
    @mattbengry74605 жыл бұрын

    Thank you for the videos. I was shown using a seam ripper from a fabric store to cut through tape or braiding on a wiring harness works wonders.

  • @quarter_bubble_garage4946
    @quarter_bubble_garage49466 жыл бұрын

    Excellent video! Thank you for all the information you share helped me a ton during my swap.

  • @ezelk1337
    @ezelk13375 жыл бұрын

    Thank you again. This is the best video that I have seen on this. You are the man!

  • @lprojecxa1stcustomz686
    @lprojecxa1stcustomz6865 жыл бұрын

    Thanks for my programming man my truck runs great Lt1 swapped S10 Sonoma. Looking forward to some more of your services with my ls swaps 💪💪💪

  • @armando43mmoralesrd76
    @armando43mmoralesrd764 жыл бұрын

    Everytime I get to watch this video I just can't stop watching finally someone who explain step by step and doing things at the same time and I have a ? Do you do this for any person if so let me know thanks

  • @luctessier2215
    @luctessier22156 жыл бұрын

    Thanks Brandon for the video. Always great info

  • @atlas5651
    @atlas56515 жыл бұрын

    Best most helpful youtube video ever created.

  • @rawdoggarage9977
    @rawdoggarage99776 жыл бұрын

    Great video, thanks for the upload.

  • @y5mgisi
    @y5mgisi4 жыл бұрын

    Thank you so much for all you do!

  • @CLASSICSAREBETTER
    @CLASSICSAREBETTER2 жыл бұрын

    This is super useful info, thanks man, this must have been tedious to record etc.

  • @vandettabuilds6641
    @vandettabuilds66413 жыл бұрын

    What a great service you have given the LS swap community. I just recently bought a 92 camaro I am doing a ground up resto Every is using your info for the wiring harness!!! Thank you!!!! Check out my build.

  • @jonvanpelt5861
    @jonvanpelt58616 жыл бұрын

    Thank you for making the video

  • @ryanjohnson2614
    @ryanjohnson26144 жыл бұрын

    amazing videos man!

  • @1vernl1
    @1vernl16 жыл бұрын

    Thank you so much for this video

  • @robertnelson9505
    @robertnelson950517 күн бұрын

    Thanks for the great information

  • @dennisalstonZ06
    @dennisalstonZ063 жыл бұрын

    The Blue wire on a 03 flex fuel harness from the Alternator you can use it for your aftermarket tech anh it works 👍

  • @justinw523
    @justinw5235 жыл бұрын

    Man your smart! I was going to have someone do this for my '88 MCSS gbody LS swap cause I hate wiring but long as I have the harness and wire chart I should be okay? I'm running a LS1 with 4L60E and using all my stock gauges, the car will look 100% original until you pop the hood. Thank you for the inspiration

  • @ranchogutierrez5139
    @ranchogutierrez51396 жыл бұрын

    respect

  • @amrikjaswal76
    @amrikjaswal764 жыл бұрын

    Hi...thanks for the great videos....if I was going to use a th400 instead of the stock 4l60e with ls1, which pi s do I remove out of the harness...my motor and harness is out of 2002 Corvette. Thank you

  • @marcocasillas5023
    @marcocasillas50236 жыл бұрын

    Thank you for all your information on wiring harnesses makes doing the engine swaps easy I'm now working on a Chevy Cobalt SS supercharged 2 L do you have any videos on that or pinout and can you do the computer if I send it to you I'm putting it in a Baja Bug thanks again for all the information you give us

  • @Bizego_innovations
    @Bizego_innovations5 жыл бұрын

    question towards the factory sarvc plug wires, looking for the location to the blue wire. did a rewire and cant find a location. its in a stock factory truck. any help is appreciated

  • @maxhertz8053
    @maxhertz80534 жыл бұрын

    Well i was om the fence of doin ls swap to my 77c10. See you got the dr pepper flowin and thats all the convincing i needed. Haha this guy knows whats up people.

  • @AllThingsQuick
    @AllThingsQuick5 жыл бұрын

    I got a 5.3l vortec from a 2001 chevy 1500. That's the LS based model, just wondering if this is the exact same thing? Or is the LT and LS different? I don't wanna screw anything up. Please let me know.

  • @TheSaxon25
    @TheSaxon253 жыл бұрын

    your choice of cold snack sparks joy.

  • @miguelortega7799
    @miguelortega77995 жыл бұрын

    Thanks for the post, 3 questions for clarification regarding the pin outs. I'm swapping using T5 manual trans. Do I need Tcc brake signal? Since it will be a manual trans I assume I can remove all automatic trans wiring even if not highlighted? What can you recomend for vss sensor on T5? Thanks

  • @chevywild
    @chevywild5 жыл бұрын

    i have an ls1 motor wiring harness any clue where i could find pin outs for my engine ? any help is appreciated thanks !

  • @dlawson8993
    @dlawson89933 жыл бұрын

    Nice job thank's for the help..

  • @tommyjm83
    @tommyjm833 ай бұрын

    Question the pin. 33 the ppl wire that runs the tcc lock up. It's still in my black c2 connector on the factory fuse box that I'm using. When I wire up the brake switch the ppl wire to tap into that wire? Or do I take it out of the black connector?

  • @nicksee7550
    @nicksee75506 жыл бұрын

    At 48:57, referring to the cruise control wiring. I have an ‘03 lq4 and 4l80e van harness that is drive by cable. I have all the wires from the fuse block identified except for two pink wires and two dark green wires that both run to the top connector on the park/neutral safety module. Would these wires be for my cruise?

  • @schnurvids
    @schnurvids5 жыл бұрын

    If I may ask (dumb question) what should happen to he rest of the blocks from the fuse block? Green pink etc? Just curious. Thank you for your time.

  • @omanturbo
    @omanturbo5 жыл бұрын

    I am working on a swap on my gmc 98 5.7 vortec to lq9 My interiors will be swaped too to nbs , for my ac wiring can i use my old harness or i must do an initial wiring for each pin..ill be happy to hear back from you ...

  • @Jones4Dragon
    @Jones4Dragon6 жыл бұрын

    Hi I'm putting a 2006 Silverado ls swap in my c10. the question I have for you is when removing the stock harness to the truck will the DBW pedal wire be in the moter harness? I bought a donor truck and im striping it for the motor I was hoping that the pedal wire will connect to the motor harness not the cab side harness? thankyou for these great videos and you time to read this and help me

  • @davidcasey6181
    @davidcasey61813 жыл бұрын

    I noticed on your chart in connector C1 that pin 56 is not labeled. The print that I have is labeled yellow. Thanks for the great work.

  • @xRSAkingx
    @xRSAkingx5 жыл бұрын

    The purple started solenoid wire... would I run an extra relay for the starter? I don't see a starter relay in your custom fusebox walkthrough on the website

  • @Codypfleidner
    @Codypfleidner5 жыл бұрын

    The tan wires that go to the from 02 sensors to pcm. Do they need to be case grounded also even though they go to pins 26&29 on the blue connector? It’s an 03 harness and pcm just like that one.

  • @longhorn8459
    @longhorn84595 жыл бұрын

    For clarity sake, this entire process is intended to remove wire bulk correct? Or does it serve a functional purpose?

  • @jessesumrall2449
    @jessesumrall24493 жыл бұрын

    I’m missing one of the blue plastic covers for the PCM connectors. Any idea where I could get one?

  • @Woods_performance
    @Woods_performance5 жыл бұрын

    Thanks a lot! you just saved me $800 if i did it right lol

  • @MrFaberjr
    @MrFaberjr2 жыл бұрын

    Thanks for the video and your online content. I looked through your site and I may have missed it, but I can’t seem to find anything on a manual transmission like a T-56. Or does the ECU not interact with a manual transmission? 2007 6.0 btw.

  • @mycardiaz
    @mycardiaz3 жыл бұрын

    Question for you do you rework harnesses for individuals and what would you charge more or less

  • @yolandathomas7862
    @yolandathomas78626 жыл бұрын

    On the 94 impala ls swap to run a/c do i wire the AC compressor connector to the AC request wire?

  • @robertantunez6421
    @robertantunez64214 жыл бұрын

    Hello do you have any info on making an ls harness plug n play to a lt1 firewall bulk head? i have a 95 firebird i am swapping thanks.

  • @rcarrillo331
    @rcarrillo3312 жыл бұрын

    Thank you for the videos. Im swapping a 2001 5.3 dbw and when i cut all the wires but pinks out of the fuse block i have about 4 wires hanging loose from my tac module plug what to i do with those? Are they needed? If so where do i run them?.any info or direction is much appreciated.

  • @mycardiaz
    @mycardiaz3 жыл бұрын

    Could you please answer this question everything in this video what you have on your two sheets that is highlighted in yellow and blue is that what gets eliminated from the harness

  • @METROTMEN
    @METROTMEN6 жыл бұрын

    I’m using a 2001 5.3 for my swap and converting to DBC. Can you link me to the wiring and removing of the TAC and cruise control? I saw someone on here had the same question but it was for a 03-07 and the link said it was strictly for that not 99-02.

  • @ericandrade7237
    @ericandrade72376 жыл бұрын

    We all love you ! Thanks lol

  • @535kwt
    @535kwt5 жыл бұрын

    hello sir .. i depind TAC power supply (pink from Tac blag ) i want to add it back , in which pin goes in the TAC Blag?

  • @jblong5373
    @jblong5373 Жыл бұрын

    on the LS1 Vega shown on You tube by marc Ramos,did you ever find out what motor mounts,headers and oil pan he used ? I have a 1975 that I plan to put a 6.0 in it.

  • @6xcchamber971
    @6xcchamber9714 жыл бұрын

    LT1 thanks for your videos, I am about to rework a 2002 ls 5.3 using your chart. I am putting it in a 95 mustang With a turbo. On the website it says that "if you will need to use 4 oxygen sensors or Evap system that you should hot remove them". From yours and other videos I understand how to remove the pins and work the wires out, I just don't know exactly which wires to remove. Could you please help? I have posted on other sites with no reply. Thank you, Brad

  • @jackg5094
    @jackg50942 жыл бұрын

    I have a '05 L33 5.3 aluminum block high output truck engine and it has all the wiring for the duel tank set-up. My question, can I use the PCM signal wirefor the duel tanks for my second fuel pump in my Miata swap. Does the PCM signal run the pump all the time or is it switched by the operator to go over to secondary tanks when needed. Thx.

  • @jacob2valid370
    @jacob2valid3705 жыл бұрын

    How much do you charge to do a Stan alone harness I have a 98 c1500 with a 4.3 going to put a 5.3 out of a Yukon xl 1500

  • @philliptaylor4041
    @philliptaylor40413 жыл бұрын

    The wires that go to fuel injector can u splice to make longer or do i need to replace whole wire to make longer

  • @purefukree7507
    @purefukree75075 ай бұрын

    Can I remove all of the wires labeled “(A/T)” on the chart if I am running a drive by wire manual transmission setup?

  • @domingoclaudio2729
    @domingoclaudio27293 ай бұрын

    I just picked up an engine 6.0 L9 block with a 6L90 transmission where can I get the harness modified for my 1981 Chevy Monte Carlos.

  • @smithjo4152
    @smithjo41525 жыл бұрын

    Hello. I went to start my dad's 1967 Olds Cutlass with 4.8LS (Engine from 2003 Chevy Silverado) Conversion and smelled fuel, I luckily had the exhaust and headers separated. I saw fuel spraying out of the passenger side of the header. I Swapped injectors for Cylinder #4 & #6 after smelling fuel on the plugs. I restarted the engine and the fuel still leaked unburned raw fuel. Any Ideas on how I should fix?

  • @adanmartinez1500
    @adanmartinez15005 жыл бұрын

    Is there lots of differences between this harness and the one for 99-02?

  • @izaakbennett9482
    @izaakbennett94826 жыл бұрын

    I’m putting a 5.3 with 4l60e on a small lawn tractor nickname “Death Tractor”

  • @tenoriopaintcollisiontenor4363
    @tenoriopaintcollisiontenor43635 жыл бұрын

    Hey whats up i don't know if it's just me or im missing it but i can't find the schematics on the wiring harness for a 2005 chevy suburban just picked it up 2005 rwd 5.3 thanks in advance

  • @americorodriguez3726
    @americorodriguez37266 жыл бұрын

    I was wondering, what year are you modifying this for?

  • @jamest.5001
    @jamest.50014 жыл бұрын

    Would it be possible or difficult to add flexfuel to a swap? I'm stuck in the 70's and looking to make the leap to the 21'st century! The newest vehicle I owned was a 92, Chevy truck, I swapped in a 454, I just bought a 96 S15, I want to swap in a 05 or so 4.8L. Engine and trans, or would the v6 4L60 be OK? I'm thinking just swap the engine and trans, with standalone ECU TCM, I guess connecting the stock harness for the gauges would work?

  • @whynotbedanny
    @whynotbedanny5 жыл бұрын

    Is it the same process for the harness of an 01 lq4 6.0?

  • @nope2u399
    @nope2u3993 жыл бұрын

    I have an 03 Express van harness and relay box is it the same keyed power c1-a9 as the truck relay box to power up everything???

  • @r3d1911
    @r3d19113 жыл бұрын

    Question. When your adding pins to say where the fan goes why not just reuse one of the other wires you've already taken out instead of making a entire new wire? Is that ok to do?

  • @bbbk53
    @bbbk534 жыл бұрын

    props, rewiring now

  • @8126926
    @81269265 жыл бұрын

    I got two harnesses, a 2001 and a 2003, both with no tach module electric throttle control. What I do?

  • @stacyadams4386
    @stacyadams43865 жыл бұрын

    What do I do about the battery current sensor and alternator wires my donor harness is from a 06 Sierra

  • @iamgoat3035
    @iamgoat30353 жыл бұрын

    so is this for a swap that will keep the stock LS computer , intake and fuel injection system?

  • @jennyestes9627
    @jennyestes96274 жыл бұрын

    just got a 2007 lm7 5.3 trying to convert to standalone system. if i am running a standart transmission can i remove the transmission wires

  • @toddmathison7517
    @toddmathison75175 жыл бұрын

    I'm going to ask a dumb question. Why can't I use the entire harness minus the gauge and climate stuff? I got all the fuse blocks and relay box. If I just tape off what I don't use would that work?

  • @ricardoparra6927
    @ricardoparra69273 жыл бұрын

    Thank you for creating this amazing resource! I am in the middle a swapping a Gen III 5.3 w/ 4L60E. I am in the research phase attempting to determine how much functionality I can retain. One thing I have asked in multiple forums is regarding the instrument cluster but haven't found anything useful. is it possible to keep the donor vehicle's instrument panel cluster?

  • @hudsonauto13

    @hudsonauto13

    Жыл бұрын

    Yes im using the oe sensors and runing paralell

  • @biglon62
    @biglon625 жыл бұрын

    What type of soldering iron is the one you are using?

  • @adamvival9627
    @adamvival96274 жыл бұрын

    I bro I have a question on 07-13 harness Looking for color wiring fuel pump cus I swap from v6 to v8 and I don’t have power to fuel pump

  • @fat_cat8457
    @fat_cat84572 жыл бұрын

    Do you have info on reworking a gen 4 e38 harness from a van?

  • @colbylange9282
    @colbylange92823 жыл бұрын

    Why did you skip doing anything with Pin BLUE 35 (CPP switch signal)? It's marked in blue, was that a mistake?

  • @Juicesquaredchevy
    @Juicesquaredchevy4 жыл бұрын

    At the end says cruise control totally optional. O think like 3 wires. If you don’t want it do you just pull it out like the other unnecessary wires?

  • @ricardoalvarez1210
    @ricardoalvarez12103 жыл бұрын

    with the original fusebox can i run it like that only with the c2 conector?

  • @franciscolara8359
    @franciscolara83597 ай бұрын

    You guys know, if I can I put a 2011 5.3 Silverado harness in a 2008 tahoe 5.3 block and transmission with a 4L60E?

  • @tomsmk3
    @tomsmk34 жыл бұрын

    Now those wires that go deeper in the harness, what do you do with them????

  • @SuperCcohen
    @SuperCcohen Жыл бұрын

    So if we are not using the auto trans do we just eliminate everything associated with the a/t

  • @charlespierson4619
    @charlespierson46193 жыл бұрын

    Do you have a video on a 2007 gen IV 5.3ltr loom??

  • @supdus
    @supdus6 жыл бұрын

    how much of the cabin wiring do you need with this harness,

  • @aidenlopez5249
    @aidenlopez52493 жыл бұрын

    Can I use this video to ls swap my 93 Silverado 1500

  • @rockabichebel
    @rockabichebel3 жыл бұрын

    hello how are you plz i have hummer h3 2006 v5 3.5 l with E40 ECM if i find v8 gn4 with E67 Ecm and harness i can put it on my h3 and work properly all gauges and ABS and traction control? and transmission sure i wanna make changes in th. 4l60 to v8 ... o r other E C M?

  • @robertfarris3085
    @robertfarris30855 жыл бұрын

    Does anyone have the wiring diagram for the white C150 wiring or know a link to the information?

  • @jameslogan454ZZ
    @jameslogan454ZZ3 жыл бұрын

    Im 20p3 5.3 ls swaping in to a 1095 GMC 3500 dulley that had a 6.5 turbo desoil in it so my swap a lil more than just wireing But does your page have a wire schematics for a 1995 GMC 3500 C in the vin because i want to wire the 6.5 i pulled out in my boat 😆 and drop 5.3 ls in the 95 gmc 3500 dulley 😆

  • @jrskeels6040
    @jrskeels60404 жыл бұрын

    When adding wires for fans or even nakimg extensions for suctom harnesses, where do you get your wire? I have a couple PCMS where the yard hacked the wires at the connectors and would like to rebuild those harnesses with the correct color coded wires.

  • @terry007ny

    @terry007ny

    3 жыл бұрын

    go to the junkyard and pull a unmolested harness that harness is done dont use the hacked harness

  • @jameslogan454ZZ
    @jameslogan454ZZ3 жыл бұрын

    It wont let me download the 03 pinout layout were do i get the link?

  • @cyrusent
    @cyrusent5 жыл бұрын

    I did a stand along harness but I didn't get the computer can I just get another one are wat should I do????

  • @ELPATRON839
    @ELPATRON8395 жыл бұрын

    Great videos by the way ! Do you flash ecu ‘s and how much do you charge ?

  • @LT1SWAPCOM

    @LT1SWAPCOM

    5 жыл бұрын

    I sure do, www.lt1swap.com/programming.htm

Келесі