2006 GMC Sierra Logo
Posted on Oct 22, 2009
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I want to install an aftermarket stereo in my 06 GMC Sierra. Do you have the wiring diagram for the factory stereo harness?

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  • Expert 51 Answers
  • Posted on Oct 22, 2009
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Joined: Oct 17, 2009
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Go to walmart or bestbuy and get the wiring adapter so you dont have to cut any wires. they are color coded

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Trying to figure out if i really need a special wiring harness for my 2005 gmc sierra 1500 i just got a new kenwood stereo to replace the factory one and have been told that i have to have a special...

HI there... It would be a wise idea to get the special wiring harness for you aftermarket radio. There are several reasons for this. 1 is that it will make your installation a lot easier because it will plug right in to the factory plug and all you have to do is wire the radio to the wires on the new plug.
2) the newer vehicles have the radios wired for lights when you turn your headlights on. aftermarket radios don't always have that. also your stock radio probably stays on when you turn your ignition off and goes off when you open a door. the aftermarket radio is not set up for this and could cause electrical problems if not hooked up. to avoid any nasty electrical headaches I would advise getting that special plug. Hope this helps you out
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