Question about 2009 GMC Sierra 1500

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My light will not come on in my 2009 Sierra. What is the most likely problem

Low beams did not come on so i used my high beams for a couple of morning; then they went out. checked relay not the problem. did not look like the fuses were bad.

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I would suspect the light switch is bad, can you hear the relay click when you turn the lights on? If you can't, replace the light switch. Check for voltage at the light bulbs, if you have 12 volts, replace the bulbs.

Posted on Dec 10, 2014

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Posted on Jan 02, 2017

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2005 GMC Sierra 2500HD, left side low and high beams out, new bulbs, fuses good. No power at the sockets. Could this be the high/low switch on the column?


It shouldn't be the high/low beam switch, as that switches the high/low beam relays. One high beam relay supplies power for both sides, one for low beam, both sides. If you were to lose switch function or a relay, you would lose the high beams or the low beams, but not for just one side. It would be interesting to probe the fuses with a test light and see if you're getting power to and through them. If you are, the problem would be between the fuse box and the headlight, if your not getting power to the left head light fuses, the problem will be in the fuse box. Good luck!

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2008 gmc truck Low beams quit working. I have High beams and running lights only. whats possible fix?


Are the bulbs good?

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1998 GMC Sierra has running lights and high beams but no low beams. Headlight switch is not the problem


first off, be sure your low beams aren't both burned out. it happens all the time. next check your dimmer switch operation. (i'm betting on low beams burned out) good luck.

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Does this model use a 4 headlight bright system? I have 2 low beam lights but when I put on the bright lights the 2 low beam lights go out and only the 2 bright lights stay on.


I think that many 1990s and even some 1980s GM vehicles with seemingly 4 headlight systems actually use only 2 at a time.

My 1990 Oldsmobile Cutlass Calais, for instance, had 2 high beams that went on independently of the 2 low beam lights when switched with the turn signal lever.

In the 1970s the GM vehicles had 4 headlight systems where all 4 headlights would go on, but they used sealed beams rather than the capsule lights that are used nowadays.

For instance, our 1976 Cadillac Seville has a 4 headlight system that lights up 4 headlights on the high beam mode.

Good luck on seeing at night with the current set up.

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1 Answer

Low Beam headlights don't work. High Beam work fine and diriving lights work as well.


hi from uk provided you have checked bulbs are ok? then this fault may be the relay for the low /dipped beam has gone faulty if you check h/book you may find location of low beam relay there is relay for high and one for low beams if you find both relays ? try switching? this will confirm relay fault if you then have low beam but no high ? b4 you buy new relay other than tis the other possible fault may be the actual di/high beam stick control ?

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My low beam lights sometimes stop working i still have high beam and daylight runing lights after a while they come on.2009 elantra dealer can't find problem.


when the low beams quit try switching from high to low and back and see if low beams stay on, if they do it may be the dimmer switch, if that doesn't change anything suspect the headlight switch.

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Headlamps for a 2006 gmc sierra aren' t working


i would try replacing headlight switch....

Jun 08, 2008 | 2006 GMC Sierra

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