HDM Relay under the hood. There is a recall for this. Swap # 43 and #46, you'll have lights again. But in the mean time, buy a new relay. I keep extra in glovebox.
I would start with the checking the bulbs, fuses, then check the switch.
SOURCE: headlights wont come on, but parking lights work...i dont get it
Was sent in by another poster, just posting his results which fixed mine. Problem was relay $50.00 at GM only.
Check the relay module. 45 or 46. on the engine relay block. you can
swap the two they are the same part number, then you will know. Dont
start the engine, just check the lights. If it works replace the relay
module. You may have to order the part from the parts store. Or go to
the dealer to get it.
SOURCE: 2004 chevy trailblazer fuse box diagrams
I have front and rear a/c. The air is blowing in the back but not in the front. Don I have 2 blowers/units. Could this be a fuse?
SOURCE: replace low beam headlight on 2003 chevy trailblazer
when the hood is open there are two pins that have to be pulled. they have a 90 degree bent end that have to be rotated and pulled directly up. once both are pulled the headlight can be slid out and headlight changed.
SOURCE: 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!
SOURCE: 2004 Chevy Trailblazer radio and CD player works, but no sound
if you have installed a new cd player in there then the propblem could be that your speaker wires and either touching each other or grounding them selfs out.. pull of the cd player and check to make sure all the speaker wires are covered properly and no bare wires are exposed.. if you still have a factory cd player in it then you will probably need to take it to a dealership to have it checked out..
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