Question about 2003 GMC Sierra
Pop the hood. Find the square black fuse box on the driver side (Same side as the windshield washer jug and battery). Pull the top off the fuse block. There will be a label under the lid indicating what the fuses do. The cig lighter fuse is in this fuse block.
Posted on May 05, 2015
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Posted on Jan 02, 2017
i just changed my unit on drivers side door man it was a pain well first it started off with not going at all i thought it was the motor but motor was good the wire was just getting hung up because the plastic piece broke on the track,so first disconnect motor from track and hit switch to see if it turns,and if not then replace motor,be careful not to loosen the cable.you almost need it exact tension for the track to work right.
Posted on Mar 30, 2009
the fuse is located in the underhood fuse block. if you remove the cover & turn it over there is a diagram that tells you which fuse is for what.
Posted on Jul 07, 2009
Mkisner, I have a 2003 gmc 1500 extend cab. I hear a small fan running in the headliner. It's very loud when cold outside. When I press on the grille in the head liner it quiets down. After the cab warms up the sound goes away. I ask the mechanic at the dealer what in heck is that. He said it's a fan that registers inside temperature for the air/heater. They have to take the headliner down to change it. He said expensive to change because of labor so I live with it. That is the explanation that was given to me. It does look like a speaker. The On-star voice receiver is in the mirror and speakers are the radio. That's why the radio music mutes when talking to On-Star or using the truck phone. You might what to know that Verizon has a deal with On-Star to add the truck phone to you Verizon bill for $9.95 per month sharing your minute with your cell phone. Verizon will assign a new phone number for your truck. It works great and you can program voice commands for the phone. Very powerful and clear. You can't go wrong but you have to keep On-Star active. Ken
Posted on Sep 15, 2009
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