location of wires under dash

2005 CHEVROLET SILVERADO

43,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC

WINKSV

MEMBER
2 POSTS

Need to locate the following three wires, preferably near the instrument cluster, fuel level sensor wire (s/b purple but I cannot locate), ignition on hot wire and instrument cluster hot wire. I may be a little color blind so a point in the right location would help! Lol, I have tried to find decent diagrams, but have had no luck. Haynes manual is not much help either. Thank you

Sep 16, 2020 at 12:01 PM

DANNY L

✓ASE Certified Mechanic
5,648 POSTS

Hello, I'm Danny.

I've attached the wiring diagrams you've requested below. I've cut the 2 pictures in half so you can view larger.From what I viewed the purple wire for fuel you are looking for originates from the ECM. Let me know if you have any further questions on this issue.Hope this helps and thanks for using 2CarPros.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Sep 16, 2020 at 3:38 PM

WINKSV

MEMBER
2 POSTS

Danny, I believe this information will help me. If I am reading it correctly, I can tap the pink wire leading into the instrument cluster as ignition hot and the red wire leading into the instrument cluster as illumination hot. It looks like I have to tap into the purple wire for the fuel sending unit as it enters the PCM? I do not see where I could tap into it anywhere near the cluster under the dash? Thanks, Vince

Sep 17, 2020 at 7:58 AM

DANNY L

✓ASE Certified Mechanic
5,648 POSTS

You're welcome!

Keep us updated and let us know if you have any further questions on this issue.Here is a few tutorials for you in case you need:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-check-wiring

Hope this helps and thanks again for using 2CarPros.

Danny-

Sep 17, 2020 at 1:31 PM