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.