1999 denali bose stereo

trying to install after market deck everything works but have no sound is there a separate wire i need to hook up for the factory Bose amp

Plug the factory back in and test with a multi-meter. The color varies for each year. Hook it up to whatever wires shows 12v when the radio is on and 0v when the radio is off (By turning the radio off manually, not by the key). Sorry I could give you a color, but it usually varies and I have seen too many people hook stuff up without testing. =bad stuff. Follow these instructions and you should be fine.

If you purchased the wiring harness, there will be a blue wire possibly labeled Power Antenna or maybe a blue/white wire labeled amp turn on..  Connect it to the Blue/White wire of the aftermarket radio.Let's Go Brandon Brown. Congratulations on your first Xfinity Series Win. LGBFJB

It should be a pink on the other connector, not on the main harness.

second yimke

Ditto with yimke.....it should be a wire on the end of one of the sides of the harness.   and pinkis right......half of the truth can be worse than a lie. <----Roger Russell said that..