2002 Tahoe Amp Problem

[italianstln 10+ year member]

Does anybody know how/where I can get a wiring diagram for a 2002 Tahoe factory radio deck, or if anybody has had any experience with this particular car. I'm trying to hook up an amplifier and a pair of subs, but the radio only has speaker level outputs, and I can't figure out which wire is the 'blue turn-on wire' for the amp because there are two blue wires. And also I need to find out where/how to hook up speaker-level connections for the subs.

p.s.- the only hook-ups on the back of the stereo are an 18 pin, and a 21 pin connector.

p.p.s.- i know getting a new deck would be quite a bit easier, but i want to stick with the factory deck.

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btw. no bose, it has onstar, but i'm not currently using it.

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[italianstln 10+ year member]

also, would it be ok to just splice into the existing rear speaker outs at the deck?

 

[WrenchGuy 10+ year member]

Just splice the rear speaker wire at the second row. Pop the panel just before it goes over the wheel well. Run a remote turn on from the IGN fuse in the panel in the dash. Done!