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99 GMC suburban Rear speakers dont work. I have a 99 GMC suburban. I just replaced the AC Delco stereo head unit with a pioneer. Now the rear door speakers do not work. I have heard i need to bypass the factory amp. If this is true, how do i do that?

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  • jimmy_garrid Feb 13, 2010

    Did just that. Connected the blue wire from the truck to the blue and white remote wire from the radio and everything works perfectly. Thanks again!

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  • 306 Answers

Do not need to bypass. as i said just connect the turn on lead at the factory harness to the amp control wire on the radio

Posted on Feb 08, 2010

  • towin4fun Feb 10, 2010

    if you need to bypass the factory amp its located unser the drivers front seat

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SOURCE: I have a 99 GMC suburban. I just replaced the AC

Find a blue wire on the wire harness to the truck and connect from the blue white on the radio. this will turn on the factory amp that runs the rear door speakers

Posted on Feb 08, 2010

Testimonial: "Worked perfectly! thanks"

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