If it was my truck, I would make a wiring diagram of what I have now and compare with the original Chevy/GMC diagram.
I would understand what I have before removing anything. Take pictures.
Many replacement wiring harnesses "modernize" and are not the same as original.
Learn and understand the differences before you start.
Example:
The kit may be designed for a newer GM steering column which has a new plug and you may have to fabricate or purchase an adapter plug.
The kit may not have the instructions you need to adapt your existing turn signal circuit (there were/are many different add-on turn signal kits).
Most likely you will need to make a turn signal wiring diagram of what you have, and figure out how to adapt it, before you begin.
The manufacturer, of the new wiring harness, may sell a turn signal kit that is designed to work with your new wiring harness.
Just in case, if you have changed from 6V to 12V and retained the original fuel gauge then you either need a voltage dropping resistor, regulator or buy a new 12V gauge.
Last edited by buoymaker; 10/07/2021 2:29 PM.
