Quote Originally Posted by 1FastGP View Post
I got that diagram off all data so it should be right I used it to reinstall the same amp in my 98 after the p.o. cut the connector and took the amp out. Knowing gm they probably used the same connector just moved it to the trunk for the bose setup in 99

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Nice! That's good to know. I wonder what the pinout of the second connector is though, and what wires need to be spliced. My experience is mainly with the factory bose amp. I've done way too many stupid upgrades to my car.