Question about 2002 Chevrolet TrailBlazer

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How do I replace the bulb in my headlamp on my chevy trailblazer

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Hi my name is Alex the way you could change the light bulb when you open the hood on the front of the car you look behind of the light bulb and there is a latch that you pull up and the whole bulb comes out and from there you will be able to change your bulb. and after your finished with the bulb putting it back in you will have to level it out OK ? i hope this will be in be enough helpful information

Posted on May 16, 2009

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Posted on Jan 02, 2017

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Dim on headlight not working, changed fuse,bulb,relay 15016745,and bulb connector,still want work-2002 trailblazer


Low beam's don't work , how about high beams . Low beam relay is turned on by the BCM - body control module , headlamp switch is a input to the BCM . Your best bet mite be to take it to a qualified repair shop , rather then guessing an replacing parts you don't need . Hooking up a scan tool an checking for DTC'S - diagnostic trouble codes should have been the first step before replacing parts .
The headlamp driver module (HDM) is an electronic module that provides electrical power to the vehicle low beam headlamps. The HDM is controlled by a pulse width modulated (PWM) ground signal from the body control module (BCM). The BCM determines the desired lamp intensity using the ambient light sensor, multifunction switch , wiper motor, and the park brake switch as inputs. In general, the HDM will operate in one of three modes:
• Reduced Intensity Mode: This mode is used by features that do not require or allow maximum low beam headlamp intensity such as daytime running lights (DRL) (nominal: 81% duty cycle).
• Full Intensity Mode: This mode is used by features that require full low beam headlamp intensity such as low beam headlamp operation in manual, wiper activated headlamp (WAH), or auto modes (nominal: 100% duty cycle).
• Off Mode: This is the default mode of the system that will occur when none of the features described above are active. The BCM will deactivate its PWM output (0% duty cycle) during this mode.

Chevy Trailblazer headlights don work HDM input output testing YouTube

Aug 27, 2017 | Cars & Trucks

2 Answers

How do I replace front headlight bulbs?


To replace a headlamp bulb, do the following:

1. Open the hood.

2. Remove the rubber

cover and socket from
the headlamp.

3. Release the retainer clip holding the bulb by

pressing down and moving the metal retainer away

from you.

4. Pull the bulb out of the fixture.
5. Reverse the steps to install a new bulb.
You can get a free owners manual at this site (where i got your info)
http://www.automanualonline.com/base/chevrolet/tracker/2003/2003-chevrolet-tracker-owners-manual/
It's free just enter the code they give you and Save or Open it. I'd save it. The site is safe.

Mar 10, 2011 | 2003 Chevrolet Tracker

1 Answer

2004 chevy trailblazer, Both low beam headlamps are out. Headlamps replaced(same problem). Fuses are good. High beams work fine.


There should be a relay for the low beams. Locate and replace, Or swap it with another relay to see if that fixes the problem.

Dec 27, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

Need to replace low beam headlamps on 2006 Chevy Trailblazer.


For the passenger side- need to remove the air cleaner top and move the air cleaner out of the way. You can now access the rubber covers that protect the bulbs.

For the Drivers side, just stick, your hand down behind the headlight and remove the rubber cover.

Remember, do not touch the new bulbs, the oil from our hands will burn a hold in the bulb.

Dec 11, 2010 | 2006 Chevrolet Trailblazer Ext

1 Answer

How to replace headlight bulb on 2002 chevy trailblazer


Headlamp Removal & Installation Bulb Replacement To Remove:
CAUTION
Halogen bulbs contain pressurized gas. Mishandling a bulb may result in the bulb shattering into flying glass fragments.
CAUTION
Make sure to wear eye protection when handling a halogen bulb.
CAUTION
Do not touch the glass of a halogen bulb, only handle the bulb by the base.
CAUTION
Do not allow a halogen bulb to come into contact with dirt or moisture.
CAUTION
Make sure to dispose of a used halogen bulb properly.
CAUTION
Do not allow children to handle halogen bulbs.
  1. Turn the lamp switch to the off position.
  2. Make sure the bulb is cool before changing.
  3. Remove the headlamp assembly from the headlamp panel.
  4. Remove the rear access cover from the headlamp assembly.
  5. Disconnect the headlamp connector.
  6. Remove the bulb from the headlamp assembly by rotating the bulb and socket counterclockwise.
To Install:
  1. Connect the headlamp connector.
  2. Install the bulb into the headlamp assembly by rotating the bulb and socket clockwise.
  3. Install the rear access cover onto the headlamp assembly.
  4. Install the headlamp assembly into the headlamp panel.
Headlamp Assembly Chevrolet To Remove:
Headlamp Assembly (Chevrolet) gm-06-00-1591.gif

  1. Remove the grille from the front of the vehicle.
  2. Release the headlamp assembly retaining tabs.
  3. If equipped, disconnect the headlamp leveling motor connector.
  4. Disconnect the headlamp connector.
  5. Remove the park/turn and side marker bulb sockets from the headlamp assembly.
  6. Remove the headlamp assembly from the headlamp panel.
To Install:
  1. Place the headlamp assembly into the headlamp panel.
  2. Install the park/turn and side marker bulb sockets into the headlamp assembly.
  3. Connect the headlamp connector.
  4. If equipped, connect the headlamp leveling motor connector.
  5. Lock the headlamp assembly retaining tabs.
  6. Install the grille onto the front of the vehicle.

Jul 20, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

How to change front headlamp bulb? Low beam


  1. Open the hood.
  2. Remove Grille.
  3. Remove the 2 retainers on back of headlamp assembly and remove the headlamp from the sheet metal panel.
  4. Remove the access cover from the rear of the headlamp.
  5. Disconnect the electrical connector from the socket.
  6. Rotate the bulb and socket counter clockwise in order to remove the bulb and socket from the housing.
  7. Disconnect the electrical connector from the socket.
  8. Remove the bulb and socket from the headlamp.
Installation Procedure Important: • Replace a high beam bulb with another high beam bulb. The high beam bulb has a black socket. • Replace a low beam bulb with another low beam bulb. The low beam bulb has a gray tip and a grey socket.

Oct 14, 2009 | 2002 Chevrolet TrailBlazer

1 Answer

How do you get to the low beam to replace it on a 2003 chevy trailblazer. it is burnt out and i can't find how to remove it to replace it.


there is an access cover at the rear of the headlamp that you need to remove. once you do that you will gain access to the headlight bulb. remove the electrical connector and then twist the bulb counterclockwise to remove it.

Sep 23, 2009 | 2006 Chevrolet Trailblazer Ext

3 Answers

Change low beam


Headlamp Removal & Installation Bulb Replacement To Remove:
CAUTION
Halogen bulbs contain pressurized gas. Mishandling a bulb may result in the bulb shattering into flying glass fragments.
CAUTION
Make sure to wear eye protection when handling a halogen bulb.
CAUTION
Do not touch the glass of a halogen bulb, only handle the bulb by the base.
CAUTION
Do not allow a halogen bulb to come into contact with dirt or moisture.
CAUTION
Make sure to dispose of a used halogen bulb properly.
CAUTION
Do not allow children to handle halogen bulbs.
  1. Turn the lamp switch to the off position.
  2. Make sure the bulb is cool before changing.
  3. Remove the headlamp assembly from the headlamp panel.
  4. Remove the rear access cover from the headlamp assembly.
  5. Disconnect the headlamp connector.
  6. Remove the bulb from the headlamp assembly by rotating the bulb and socket counterclockwise.
To Install:
  1. Connect the headlamp connector.
  2. Install the bulb into the headlamp assembly by rotating the bulb and socket clockwise.
  3. Install the rear access cover onto the headlamp assembly.
  4. Install the headlamp assembly into the headlamp panel.

Jul 16, 2009 | 2004 Chevrolet TrailBlazer

3 Answers

Replacing a headlight bulb, low beam, in a 2004 Chevi Trailblazer


Step1
Your first stop should be to your local auto parts shop to get the bulbs you need. You'll need to pick up #9006 bulb, this one has a gray bas and is used for replacing the outside high beam. If you are looking to replace your inner low beams you'll need to pick up #9005 which has a black base. The bulbs should run you about $16.00 USD.
Step2
Alright once you have your bulb and are ready to replace it make sure you have popped the hood the release lever is on the inside of your vehicle.
Step3
While facing your car with the hood open, your going to remove the grill by pushing down on the two retainer clips which are on the top of the grill. You'll need a flathead screwdriver to help you with the rest of the retainer clips. There are two on the bottom ends of your grill one in the center and 2 on each side. Now you'll just pull up on the grill and it should come out easily.
Step4
On each side of the headlamp you should see a One inch long tab, when you pull up on the tabs it will release the headlamp so that you may pull the headlamp toward you. Pull the head lamp out.
Step5

There will be two round rubber caps at the rear of the headlamp. Remove the caps and then pull out the wire harness from the bulb.
Replace the bulb or bulbs and remember that #9006 has the gray base and is for the high beam and #9005 is for the low beam and has the black base. Reconnect the wire harness and replace everything to its original position and now you have a fixed headlamp! Congratulations!

Jan 14, 2009 | 2004 Chevrolet TrailBlazer

2 Answers

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.

Jan 08, 2009 | 2003 Chevrolet TrailBlazer

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