2006 4.3 to 5.3 Swap

[Frenchy]

This is my swap, the current sticky covers the basics of the actual swap, and the wiring for the 99-02 trucks. Well 03-07 is a little more involved, especially since I am converting an automatic harness to a factory-ish 5 speed harness. 5 speed harnesses are impossible to find here and if I can find one the price is double that of an auto harness.

What makes this swap more involved than the 99-02 swap is the the DBW system, all V6 trucks are DBC up until 2008. It is much less of a headache to convert your truck over to Fly-by-wire than it is too make your harness and BCM function properly as DBC. I will add more to this part as I get to the actual conversion of my truck to DBW

Ok, now to convert your auto harness to a manual harness, this even applies if you already have a 4.8/5.3/6.0 4l60e and want to go T-56 or other manual. Basically it's not so much a conversion as it is deciding which wires need removed and replacing the 4l60e plug with a NV3500 plug or T-56 whichever route you go. I'm starting with the 3500 and going T-56 down the road.

Now it helps if you access to GM Tech Link (or whatever the hell its called) or AllData to get wiring diagrams and connector end views, if you don't you can purchase a factory service manual or a Haynes/Chilton book as a last resort.

This is the changes needed to be made on the 4l60e connection on the engine side harness.
Gave Nathan (GasGuzzler) a call and he figured this out mostly, what is in bold is what needs to be changed or removed from your auto harness.


Transmission Range Switch Connector, Wiring Harness Side


Connector Part Information

Connector Part Information

• 15416722
• ASM Conn 12 F GT (BK)
Pin
Wire Color
Circuit No.
Function
1
D- GN
1433
(Becomes) Clutch Start Switch Signal will go to clutch switch plug terminal D (may need other end moved in fuse block plug)
2-3
--
--
Not Used
4
YE
772
Transmission Range Switch Signal B
5
BK/WH
771
Transmission Range Switch Signal A
6
GY
773
Transmission Range Switch Signal C
7
BK/WH
451
Ground
8
WH
776
Transmission Range Switch Signal P
9
L-GN
275
Park Neutral Position Switch Signal
10
GY
1524
Back-Up Lamp Supply Voltage move to reverse light switch terminal B
11
PK
839
Ignition 1 Voltage move to terminal A on reverse light switch plug
12
PU
639
Ignition 1 Voltage will go to clutch switch plug terminal C (may need other end moved in fuse block plug)


Manual Plug, engine harness side
I will get a connector end view picture, it's in front of me as I type this

The 5speed plug has 6 pins

A - Purple - 420 - Cruise Control Release Switch

B - Brown/White - 379 - Clutch Pedal Posistion Signal

C - Pink - 639 - Ignition 1 Voltage

D - Dark Green - 1433 - Clutch Start Switch Signal

E - Brown - 441 - Ignition 3 Voltage

F - Grey - 48 - CPP Switch Signal


I will add more to this as I go, lots of pictures in a full write up style.

[cjcalhoun]

what year model harness can i use with my 2003 just want to keep it simple a basic stock 5.3 swap and 4l60e and i havent been able to find a harness what years interchange with this

[Frenchy]

I'd try to find an '03 harness, mine's an '06 I'm using an '05 harness. Just as long as it has green and blue plugs at the PCM you should be fine, red and blue plugs its a 99-02

[Cruzerx]

Great to see this thread. I have the same year truck with the 4.3 and have been looking at what harness will work. The DBC thing was screwing me up. Anyways thanks for the thread can't what to see your write up.

[WARLOCK]

Do you have the swap done yet? I mean geez Devin whats the hold up?

[Frenchy]

Over the winter I'm doing it, I want to have absolutely everything planned so I don't hit any stupid little snags, and I want to do the full build all at once, so that gives me time to save some cash and gather parts, well all I actually need right now is some nice stainless LT's. And as soon as mine's done I'm puting a 5.3 I'm building now in my brother's 91 K1500

[txarkitekt]

...I want to have absolutely everything planned so I don't hit any stupid little snags...

HHAHAHAHAHAHAHAHAAHAHAHAHHAHAHA

HAHAHAHAHAHAHAHAHAHHAHAAHHAHAAH

HAHAHAHAHAHAHHAHAHAHAHAHAAHAHAHA

(breath)

HAHAHAHAHHAHAHAHAHAHHAHAHAHAHAHA

Stupid Canadians...

Hey Devin...you must have missed the Memo AND the TPS report because you WILL hit stupid snags. Its just a part of a swap like that.

[ducky]

Yep Tyler is right, you won't know how to completely do everything right the first time, until you do it. You will be running around for small parts to keep it in stock form, and you will change things up, or have to order something.

I searched and read for months on end, and a 2-3 day swap took me three weeks because I had to order small things I didn't even realize that I didn't have.

[1slo4.8]

so bacially goin from a 4.8 to a 6.0 on my truck might be a little harder than i think?

[zebra]

HHAHAHAHAHAHAHAHAAHAHAHAHHAHAHA

HAHAHAHAHAHAHAHAHAHHAHAAHHAHAAH

HAHAHAHAHAHAHHAHAHAHAHAHAAHAHAHA

(breath)

HAHAHAHAHHAHAHAHAHAHHAHAHAHAHAHA

Stupid Canadians...

Hey Devin...you must have missed the Memo AND the TPS report because you WILL hit stupid snags. Its just a part of a swap like that.

+eleventy billion!!! mine's been put together with fluids in it and everything since 10/23. i've been chasing problems since then. almost positive it's the computer...

so bacially goin from a 4.8 to a 6.0 on my truck might be a little harder than i think?

yours should be pretty easy. his (and mine) are v6 -> v8 swaps