2001 monte carlo wiring diagram - the12volt Home / the12volt's Install Bay / Car Audio / 2001 monte carlo wiring diagram (Topic Closed) Welcome Guest :) To find a new one I would suggest you tap into the pink wire located in the ignition harness. This will allow your new aftermarket unit to function correctly. 2001 Chevy Monte Carlo OE Wiring Harnesses & Stereo Chevy Monte Carlo 2001, Aftermarket Radio Wiring Harness by Metra®, with OEM Plug and Amplifier Bypass. For aftermarket stereo. Metra preassembled wiring harnesses can make your car stereo installation seamless, or at least a lot..