insturment cluster wiring

[oldcarstulsa]

i have a 04 4.8 in a 83 gmc p/u, I used the factory wiring harness and add a fuse and relay panel to it, I am trying to adapt a 02 gauge cluster to it, i have the factory manual for the 04 but none for the 02, was hoping someone could tell me what the 16 wires go to, which color to what, I have the speedometer, tach and amp gauge working, but not sure how to hook up the rest of the wires, thank you, this site has helped me a ton...

[airdeano]

what computer/throttle system are you using?
if using a cabled throttle body and 99-02 PCM you are good to go.
if using a fly-by-wire (like in 03-07) then it wont work. the serial
data the PCM supplies is "coded" differently.
youll have turn signal indicators (2)
low washer
serial data (oil, water, optional trans temp and fuel) gauges
12volt switched
12 volt constant
ground
driver information center (4)
speedo
tach
MIL
thats all i know of...

airdeano

[oldcarstulsa]

I am using the 04 pcm, vats removed, electric throtle body, need to know whick number and color wire goes to where thank you

[ShagNasty]

I will look up the wiring diagram when I get home. I just put an '04 5.3 into my '01 silverado I just can't remember off the top of my head what all the wires go to.

On a side note: Airdeano do you know if there is any way to change the serial data output on an '04 PCM so it will read on my '01 cluster?

[ShagNasty]

This is from an '02 Silverado 1500 5.3L

http://shaggypokertables.com/motorsw...terdiagram.jpg

[oldcarstulsa]

thank you very much, will go out tomorrow and see what happens, i guess it probably willl not work since i have 04 pcm, but got cluster on ebay for .99 cents so got to at least try.

[oldcarstulsa]

thanks for wiring details, got the speedometer,tach, volt, oil, water, check engine light all working, now just have to figure out how to make fuel guage work, thanks again for info

[ShagNasty]

No problem, glad you got it working. Did you have to do anything special to get the 02 cluster gauges to work with the 04 PCM?

[oldcarstulsa]

the things like seat belt, and warning lights were not compatable, so just took the led lights out and unpluged the message center, but just hooked the wires up like the drawing said and the important things worked. thanks again

[Chuck21387]

thanks for wiring details, got the speedometer,tach, volt, oil, water, check engine light all working, now just have to figure out how to make fuel guage work, thanks again for info

How'd you get engine temp off of that pinout chart?