Question about 2003 GMC Sierra 1500

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2003 gmc sierra running not working I replaced the bulbs

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  • gbob59 Apr 13, 2015

    Hi william colley, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: headlight replacement 1998 GMC Sierra

there are two rods that slide down from the top. you have to turn to get them out of clip then pull up. once both are out then headlight can be removed.

Posted on Dec 22, 2008

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  • 1 Answer

SOURCE: 2003 GMC Sierra heater Blower wont shut off

My 2003 Sierra's blower came on by itself in the garage while I was sleeping and ran the battery completely down. I had to replace the blower switch located under the glove box next to the blower at the bottom of the right corner of the dash. The switch is in front of the blower and held in by two screws. Disconnect the two wire connections. This is a "dealer only" part and cost me 65.00. Also check the wire harness with seven wires connected to it for melted plastic. It will be marked "ABCDEFG". If it has melted, you'll need to replace it. Pay attention when reinstalling either part, that the wires "ABCDEFG" match the switch in that order.

Posted on Jan 17, 2009

  • 1 Answer

SOURCE: Replace 2005 GMC Sierra Daytime Running Lights...

Open the hood, and in the top right and left corners of the primary headlamps you'll see two pins (L shaped) swing them out (towards the front of the truck) and lift out. This allows you to remove the upper headlamp assembly. You can then remove the lower assembly by pushing outwards on the plastic clip that is hooked into a metal clip. Once it's out you just turn the bulb to remove it.

It's much easier if you unhook the leads to the upper assembly's bulbes so you can set the whole thing aside.

Posted on Mar 31, 2009

Molson02536
  • 3854 Answers

SOURCE: I changed batteries in my 2003 GMC Sierra key fob

1. Close all doors
2. Insert key into ignition
3. Hold down the power UNLOCK button on the driver's door panel, continue to hold down
until instructed to release in step 9.

4. Perform steps 5 through 8 in a fairly rapid succession.
5. Turn the ignition to the ON position (as far as you can go without starting the engine.)
6. Turn the ignition to the OFF position.
7. Turn the ignition to the ON position (as far as you can go without starting the engine.)
8. Turn the ignition to the OFF position.
9. Release the power UNLOCK button on the door panel. The vehicle should respond by
door locks locking and unlocking automatically. (If locks do not cycle after you let go,
not before you let go of the unlock button, then the vehicle has not entered programming
mode and you must start procedure over. Remove key from ignition, open drivers door
and return to step 1 ). If the locks do cycle automatically then proceed to step 10.

10. Hold down the LOCK and UNLOCK buttons on the remote until the doors lock and
unlock. This may take up to 30 seconds.

11. Repeat step 10 NOW for each additional remote. (Including any existing remotes).
12. Turn the ignition to the ON position to exit the programming mode.
13. Test remote(s).

Posted on Mar 06, 2010

  • 1 Answer

SOURCE: wiring diagram 2003 GmC Sierra

I need wiring digram for GMC 2003 SIERRA . I have the left head light working fine but the right I have no power to it. I have checked the fuses and relaysand so far have not found and broken or frayed wires.

Posted on Mar 06, 2010

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The tail light fuse is under the rear seat on the drivers side.

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open the hood and reach down to where the parking lights are located and give the plug in a 1/4 turn conterclockwise and the bulb should release from the lamp case. Then just remove the bulb from the plug that you gave a 1/4 turn to...and replace bulb. Then just put the bulb back in the casing and give a 1/4 turn clockwise to tighten. NO TOOLS REQUIRED

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1 Answer

Replace 2005 GMC Sierra Daytime Running Lights...


Open the hood, and in the top right and left corners of the primary headlamps you'll see two pins (L shaped) swing them out (towards the front of the truck) and lift out. This allows you to remove the upper headlamp assembly. You can then remove the lower assembly by pushing outwards on the plastic clip that is hooked into a metal clip. Once it's out you just turn the bulb to remove it.

It's much easier if you unhook the leads to the upper assembly's bulbes so you can set the whole thing aside.

Mar 30, 2009 | 2005 GMC Sierra

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How do I replace a fog lamp in my 2003 GMC Sierra hd


are you talikn about just the bulb? or the whole light?
For the bulb just unplug wiring from the back of the bulb and twist bulb and pull, do not touch the bulb of the new light the oils from your fingure will and can cause the bulb to burn out premature

the entire ligh has two pop rivets one on each side remove those. there is also an adjuster knob remove the knob and the spring pull the light off and replace with new.. you may want to mark the location of the adjuster knob so that on reassembly you know where the adjustment was for proper light position

Mar 04, 2009 | 2003 GMC Sierra 1500

1 Answer

2003 GMC Sierra Pickup


You've checked all your signal bulbs are working? have you tried another signal relay?

Aug 23, 2008 | 2003 GMC Sierra 1500

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