Question about 2008 GMC Sierra 2500HD 2WD

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Low beam headlights won't come on 2009 gmc sierra

High beams working fine.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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edwardjwoods
  • 372 Answers

SOURCE: headlamps for a 2006 gmc sierra aren' t working

i would try replacing headlight switch....

Posted on Aug 18, 2008

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  • 50 Answers

SOURCE: 2003 GMC Envoy Low beam headlights will not work.

I would start by checking the headlight relay and headlight fuse.  You also may wanna check to make sure the bulbs aren't blown out.  If those parts check out to be fine and in working order, you may need to replace the turn signal assembly in the steering column.  This part controls the hi/low beams.  This may sound crazy but, when GM wired their older trucks, they wired the headlights to go from the battery, to the hi/low beam switch, then to the headlight switch (to the left of the steering wheel) then out to the light bulbs.  You can kind of test to see if this part is good by making a fist and (with your headlights on) gently hitting the plastic cover for your steering column that is right behind your actual steering wheel.  This could cause your headlights to flicker on and off.  It's not 100% guarenteed that this method will work, but it may.  
Any questions, just ask!

Posted on Feb 02, 2009

  • 15 Answers

SOURCE: My GMC truck 1993 Sierra just had new headlights

Yes you can. There is an adjustment screw at the top of each head lamp and you just turn them out or counter clockwise and the beam will come down. You may also have to adjust them side to side also. There is an adjustment screw as well.

Posted on Aug 27, 2009

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  • 10 Answers

SOURCE: why dont my low beams work on my gmc sierra?

check both bulbs, i have seen both low beams burnt at the same time. check the headlight switch for power

Posted on Nov 10, 2009

  • 593 Answers

SOURCE: low beams stopped working high beams work fine

Either both bulbs are bad(I've seen it before) or your
dimmer/headlight switch is bad. If you can without pulling the bulb, pull plug from the light. If it's a 4 lamp system pull the low beam. Do this on the left side as the right feeds from the left. With a 12v test light, check for power. (with lo beam on) if you have
power, change the lamp, if you don't it's most likly
the dimmer switch at the steering collum.
Hope this helps Good luck

Posted on Jan 22, 2010

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