03 sierra 4.3 to 5.3 swap(i need help)

need some help!!!!!!!

only one plug im having trouble with, this one...
its a blue/white plug that doesnt fit... motor and harness are from 99-02 and my truck is 03, i wanted to keep cable trottle body. but these plugs do not fit nor have the same wire in the correct spot... also the truck side of the harness has 8 wires and the motor harness has 7, the only wire different is on the truck side which is a brown/black.

http://i733.photobucket.com/albums/w...3/b4153c89.jpg

http://i733.photobucket.com/albums/w...3/03f1ee34.jpg

http://i733.photobucket.com/albums/w...3/401ddb2d.jpg
http://i733.photobucket.com/albums/w...3/1b84061f.jpg
http://i733.photobucket.com/albums/w...3/788b5370.jpg

this is in big_countrys 04 silvy z71 notice both plugs are white....

http://i733.photobucket.com/albums/w...3/24363a2e.jpg

DO I HAVE THE WRONG HARNESS?

I'm going to tell you this now i'm in the process of doing a v6 - v8 swap in my 04 and its damn near impossible to try and make a 99-02 harness fit an 03+ truck and its more trouble than its worth to try and keep the cable driven throttle body. I tried and tried everything I could possibly think of to make this work and it just isn't worth it. Get yourself a harness from an 03+ truck and the drive by wire stuff and save yourself the headache trust me. The pin outs for the 99-02 harness are different from the 03+ so they do not work when you plug in the 99-02 pcm my truck did all kinds of weird stuff because nothing is pinned right in the wiring harness compared to the 03+ in the truck already.

I get that but this plug is the only issue I've had. The colors combo between both are the same just in different pin locations, maybe I can just hardener them together and see what happens

You can try repinning it, me and a buddy did an 04 standard, converted from a wt edition to ls, we ended having to switch all kinds of stuff, finally after much debate, time, and money we switched to a dbw tb, btw the 04 is the worst year to do.

I'm gonna try to call Nelson performance today but I'm thinking I am just gonna re pin it. Everything else plugged in fine except this one.

Quote:

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Originally Posted by LamboDoNoMo

You can try repinning it, me and a buddy did an 04 standard, converted from a wt edition to ls, we ended having to switch all kinds of stuff, finally after much debate, time, and money we switched to a dbw tb, btw the 04 is the worst year to do.

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I can agree this is what I am doing is a 2004 Standard WT to an LS and after going through every possible option I finally just broke down and bout the DBW stuff. I had went over everything with Allen at Nelson also and all decided the best and easiest option was to do the dbw because he didnt even have a vin to program a 03+ for dbc. Which pcm are you trying to run the 03 or the 99-02 style?

99-02 style with cable ecu has already been tuned.

Ah ok good luck. I tried the same and never could get it to work have you repinned the harness at the pcm? The wires are different as everything uses different pins at the pcm and at the fuse block for the 03+ as I found I had already gotten mine tuned from nelson as well and ended up just having them swap it out for an 03+ pcm dbw. When I initially tried to do this same thing with my truck I turned the key on and about 90% of things in my truck did not work as far as gauges, controls, lights, etc.... went to start my truck I pushed the clutch in and it started cranking trying to start itself without even fully turning the key. Thus why I just got rid of the headache and changed to dbw and a 03+ harness

Haven't tried to repin yet but will today, all the wires are the same color just not in the correct pin. Guess I'll just have to try and see what happens. And this plug comes from the motor harness and connects to the chassis harness that gies down the frame rail. It doesn't go directly to the ecu or into the fuse box!

03 express vans had dbc and return style fuel system still

Can anyone get wire diagrams for the neutral safety switch for 99-02 4l60e please

No direct neutral switch. It's all in the big rectangular connector. Here you go. This is for an 06, wire colors may be different (but I doubt it) pins will be the same.
http://i393.photobucket.com/albums/p...00/60eplug.gif
http://i393.photobucket.com/albums/p...00/60elist.gif

My ns switch is the other style with 2 plugs

Ok. The 4l60e has 2 big plugs, the one I showed you above. And this one. And clearly it has nothing to do with the neutral/park switch. Then you have the VSS. That's all there is externally.
http://i393.photobucket.com/albums/p...her60eplug.gif

And here's the complete wiring diagrams for the 4l60e.
http://i393.photobucket.com/albums/p...0/diagram1.gif
http://i393.photobucket.com/albums/p...0/diagram2.gif
http://i393.photobucket.com/albums/p...0/diagram3.gif
http://i393.photobucket.com/albums/p...0/diagram4.gif

Quote:

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Originally Posted by Frenchy

No direct neutral switch. It's all in the big rectangular connector. Here you go. This is for an 06, wire colors may be different (but I doubt it) pins will be the same.
http://i393.photobucket.com/albums/p...00/60eplug.gif
http://i393.photobucket.com/albums/p...00/60elist.gif

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Do you have something like this for the pic in the link below?

This is the plug my truck has

Sorry for just the link damn iPhone won't copy what I need
http://s733.photobucket.com/albums/w...t=595e2f13.jpg

My truck is an 03 I think gm went to the single plug in 04

I found it thanx though I will post up if it works

Ok well it didn't work. As soon as I turn the key to the Acc position the starter engages, and won't stop til I turn the key off. No spark, no fuel. What the hell? help please!!!!

Might wanna edit that post no cursing allowed man, anyways we had the same problem on a buddies truck with the truck starting in acc pos. Ill ask him what we did to fix it cus i dont remember.

Is the block from the harness that goes into the fuse box different From 99-02 and 03+? it doesn't make since that I'm not even getting spark or fuel!!

You have to use an 03+ harness, because yes, there is differences.

I repined the plug as pictured at the beginning of this thread to match each other. I also had to put a neutral safety switch plug on the harness since it had been cut off. So basically I have to get an 03+ harness and dbw stuff as well?

Quote:

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Originally Posted by 00_Silverado_Z71

I'm going to tell you this now i'm in the process of doing a v6 - v8 swap in my 04 and its damn near impossible to try and make a 99-02 harness fit an 03+ truck and its more trouble than its worth to try and keep the cable driven throttle body. I tried and tried everything I could possibly think of to make this work and it just isn't worth it. Get yourself a harness from an 03+ truck and the drive by wire stuff and save yourself the headache trust me. The pin outs for the 99-02 harness are different from the 03+ so they do not work when you plug in the 99-02 pcm my truck did all kinds of weird stuff because nothing is pinned right in the wiring harness compared to the 03+ in the truck already.

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Just do as he says lol, we have already went through this on his truck, harness,dbw tb,tac module, and pedal ur best bet is to pull it from a salvage yard and dont forget the harness from the pedal to the tac module. Btw putting the pedal in sucks.

Hahaha yeah I pulled the harness today, took some pics will post later and I can see why it won't work. Oh well now I know, hope to look for the dbw stuff tomorrow

ok in this pic is the motor side of my 99-02 harness the screws into the fuse box
http://i733.photobucket.com/albums/w...3/779582cc.jpg
this is a pic of my actual fuse box...
http://i733.photobucket.com/albums/w...3/db1a9dfa.jpg
notice the difference? looks like about half of what should be there is...
so i pulled the harnes today and im shipping it back to the guy i got it from. he said he has a 03+ harness that he will trade me (since i paid 150 for this one) and hopefully the guy he had tune me ecu for cable will just swap this ecu for another.... if not im going with nelson or a guy my buddy knows around here. priced out the pedal, harness, tac module, and dbw throttle today ( about 200 bucks). i really hope to have it running by november cause im going to a show to benifit breast canser. my mom is going with me and she has stage 4, so i really need to get this going so she can roll up in something thats gonna be in the show. if i missed anything please chime in....

Quote:

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Originally Posted by lowslung85

Just do as he says lol, we have already went through this on his truck, harness,dbw tb,tac module, and pedal ur best bet is to pull it from a salvage yard and dont forget the harness from the pedal to the tac module. Btw putting the pedal in sucks.

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My pedal just bolted in.

That'd be awesome if mine will just bolt in. But the way my luck is going probably not. Haha all good though. I really hope it works after this!!!

some do and some dont devin, we just welded simons in :lol:

Is thee a difference between 03-06 in the tac module, pedal and harness. Or are the all the same? Does it have to come out of a truck or does it even matter?

TAC modules are one of those things that should be year specific to the tune. I'm running an 05 calibration, so I'm running an 05 TAC. Physically on the outside they're all the same. As far as the trucks go.

As far as I know the 03-05 DBW parts are the same. I won't swear to it but, I think so.

Jeff

Quote:

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Originally Posted by Frenchy

My pedal just bolted in.

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He's referring to my truck and mine did not just bolt in I had to take the entire dash out to remove the whole pedal assembly from the firewall my old gas pedal had to be cut off and then we had to modify the mounting bracket to bolt the new pedal to. Not sure if its because my truck is a standard or not but it was just a pain. When I went to the salvage yard I removed the DBW stuff from the same year truck as mine an 04 and even a standard truck and I wouldn't of imagined they made that much different stuff in the same year but how it was the the salvage yard 04 was no where near how my truck is.

God damn. Mine's a standard too, had the studs on the firewall for the TAC module too. Maybe someone f'd up on the assembly line and put a 4.3 in by mistake.

Well I got bored today and compared the pinouts from a blue/red and a blue green ecu and found a few things different, not many. One a blue green ecu the blue side has a starter Enable relay (pin 39) and my harness from 99-02 doesn't have a wire there. My ecu is a blue/green but was told it was programmed to work withthe older harness.... Hmmm!!! Other differences I found was sone ac related things but I plan to pit ac in it eventually so still trading out for a 03+ harness. I'm pretty sure that my starter problem was from the block thy goes into the fuse box. Also I had to put a ns pigtail on the harness(7 wires) and 4 of them go to that block!! Which I'm assuming are in completely diff pins that an 03 truck uses. Ideally hope once I get the dbw stuff this thing will start right up. I miss driving my truck, the daily Honda just ain't doin it for me IMO

Quote:

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Originally Posted by Frenchy

God damn. Mine's a standard too, had the studs on the firewall for the TAC module too. Maybe someone f'd up on the assembly line and put a 4.3 in by mistake.

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Must have I don't have the studs on he firewall either my truck is all different from the 2004 I've been getting parts from at the salvage yard. Ideally one you put all the 03+ parts with the 03+ truck like it should be from the factory it should work.

Well got to looking at my pedal yesterday and I found out mine is gonna be a pain! It's part of the entire bracket lol! Gonna get my cutoff wheel and go to town... New harness should be here mid week next week, then gotta find some time to go get the pedal and stuff. Found the pedal, wire, and module for 75 bucks. Also found the throttle body for 48 bucks, just hope they still got em when I go up there...

Yea yours sounds like the same as mine was as long as you cut the old bracket off all the way just drill 2 holes and mount it. I had to space the bottom out a little bit to get full pedal travel.

Yeah I took a pix of it yesterday, I'll post as soon as I get on a computer. But yeah Thad what I was thinking I needed to do. Hopefully I get some progress on this thing next week, but I gotta wait for the new harness.

I'm ready to get back to work on mine all I have left is to finish putting in the new harness and bolting up a few minor things and some minor wiring and it's done

That's about what I gotta do plus install the pedal, other than that just wait for the harness which will be here next week. I already had a tuned ecu but was for 99-02 truck so I sent that back as well that should be done by the end of next week I hope but I'll have everything else ready so when it gets here plug it up and go for a spin.