Rem wire installation for an amp

[ed_1109]

Where would i find a 12v accessory lead in a gmc truck?

[spike98]

If you have a aftermarket head unit then there should be a remote turn on lead on the back of the HU. If you are staying with the factory Head then you should be able to use the acc turn on on the back of the factory HU. The color of the wire would be yellow or you can use the power antenna wire which is pink.