Question about 2004 Chevrolet TrailBlazer

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2003 Chevrolet trailblazer high beams not working

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Check fuzes first. then the headlight bulbs,check wiring and check headlight switch. One of these should be the problem

Posted on Oct 13, 2013

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Posted on Jan 02, 2017

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SOURCE: 2003 trailblzer head light bulb replacement

on a 2003 Chevy Trailblazer, you have to remove the grill to access the back of the head lights. It takes a good pull (don't be afraid to use a little force). Pop the hood and there 4 metal pieces that slide up and several plastic pieces that pop up. You will see the lips on the metal slides (about an inch in width) and you pull those up to loosen the grill. There are 2 of these slides (one on each far side, almost hidden) that are hard to get your hand into that you might need a screwdriver or something for leverage to slide them up. Then pop up the plastic pieces holding the headlamps in place and with a little force pull the grill off.
Then you can access the back side of the headlamps to replace the bulbs.

Posted on Feb 11, 2009

michigan man
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SOURCE: i need a owners manual for chevrolet trailblazer 2003

www.edmonds.com for owners manuals on line

Posted on Mar 22, 2009

countrysi248
  • 443 Answers

SOURCE: Low Beams Don't Work!

There is more than one relay I know but make sure your bulbs are good I HAVE seen this happen more than once.. low beams can go at once.. and still have hi beams check this first please .. Jerry

Posted on Apr 24, 2009

  • 1348 Answers

SOURCE: 2005 trailblazer headlights go off ocasionally

the click you are talking about is the high beam relay.
you nedd to get a tester or voltmeter and check the sockets for 12v.
there has been instances where both low beam bulbs went at once.
do the daytime running lights work?
if not,supect the daytime module...it is also wired into the parking brake.
if you put the park brake on first,then start the vehicle,the dtr do not come on

Posted on May 13, 2009

  • 66 Answers

SOURCE: i have a 2001 chevrolet cavalier and the high beam

Sounds like its a problem with the light switch handle. Had it myself as well...
If you're savvy enough around car electronics take out the light switch handle, take it apart, find the problem and fix it. Inside the handle-switch you have several slide-switches and some double action slide switches.
Otherwise - get a different switch from a local junkyard or get a new one from your dealer.
Good luck.

Posted on Jul 11, 2009

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2 Answers

2004 trailblazer headlights are not working in dim but bright lights work


Low beams don't work ??????? But high beams do ????? DRL - daytime running lamps ?

HDM relay # 46 low beam relay , under hood fuse box.

Aug 17, 2017 | 2004 Chevrolet TrailBlazer

1 Answer

High beams work low beams dont


both lows may be burnt or the module or switch has issues--is the rear lites the same

Aug 22, 2013 | 2003 Chevrolet TrailBlazer

1 Answer

Issues with 2003 Chevrolet TrailBlazer


low beam will go out automatically whem brigt beams click on

Sep 17, 2012 | 2003 Chevrolet TrailBlazer

1 Answer

I have a 2007 Chevy Trailblazer LS. The headlight don't come on, only the high beams. What causes this and how can I fix it?


Switch relay # 45 with relay #46 under the hood fuse box, do you now have lights? Clean your relay contacts really well, if this doesn't work, order a new relay. Very common problem.

May 01, 2011 | 2003 Chevrolet TrailBlazer

1 Answer

Root cause of 2003 chev trailblazer low beam socket melting.


Very common problem for TB's, should of been a recall. It's a manufacturer problem, the guage of the wires are too small and the socket just can't tolerate high heat, so tend to melt out. Try switching to a high heat socket, from a site like rockauto.com. Or if you can find a ceramic socket, that's even better.

Jan 09, 2011 | 2003 Chevrolet TrailBlazer

1 Answer

Low beams quit, high beams ok.


You have a separate fuse for the high beams and the low beams. Fuses are located in panel in driver's side of dash concealed when door is closed, or in the power distribution box under the hood on the driver's side. You have separate lamps for each (not likely since they both went out together).
The worst thing it could be, and it is very expensive for parts/labor (and you don't want to tackle this one yourself unless you are a good mechanic) is the column-mounted dimmer/cruise/wiper/washer/turn signal switch. The part alone is almost 200 bucks, and installing it requires dismantling the steering column inside the SUV.
Hope it's not that.

Feb 22, 2010 | 2003 Chevrolet TrailBlazer

1 Answer

No low beams


Possible dimmer switch problem.

May 07, 2009 | 2003 Chevrolet TrailBlazer

1 Answer

Low Beams Don't Work!


There is more than one relay I know but make sure your bulbs are good I HAVE seen this happen more than once.. low beams can go at once.. and still have hi beams check this first please .. Jerry

Apr 22, 2009 | 2002 Chevrolet TrailBlazer

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