Question about 2002 GMC Sonoma Extended Cab

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Hooked my factory stereo back up and now the security light is on and the gas guage doesnt work for my 2002 gmc sonoma

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The stereo probably has a anti theft code needed to make everything work right again. You can call your local dealer with your vin and get the code. It is usually entered in useing the preset station buttons.

Posted on Sep 30, 2009


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Here ya go. enjoy!
2002 GMC Sierra C1500 Car Radio Wire Color Codes
Car Radio Battery Constant 12v+ Wire: Orange
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Good Day,

Sounds to me like your headlight switch needs to be replaced. When you turn your light's on (parking or headlights) the switch sends two outputs, one to the exterior lights and the other output is your cluster and hvac illuminaton. You can get a new switch from a dealer for around 30 bucks new. Here's a pic of what you need:

You do need to remove your outer dash panel to gain access.

Sorry this posting is so short, just worked a 14hr day. If you need further help with replacing the switch I can walk you though the process.

Hope this helps for now.

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