Question about 2004 Chevrolet TrailBlazer

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2004 chevy trailblazer door lock remotes

Picked up vehicle from body shop. cannot unlock or lock doors with remote.I am able to lock doors from buttons on the door panels. When I picked up the vehicle the time on the clock was wrong so am assuming the battery was disconected during service. Cannot locate a fuse and have tried both remotes which were working fine when I broufght it in for service 5 days ago. Any help would be appreciatted. LP

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The body shop should be able to program the Key F.O.B back to your vehicle. If the battery was disconnected the reciver to the F.O.B lost the frequency.
If the shop can not fix it the dealer can.

Posted on Jan 27, 2009

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How program my keyless entry remote for my 2003 chevy trailblazer


1. Close all doors
2. Insert key into ignition
3. Hold down the power UNLOCK button on the driver's door panel, continue to hold down
until instructed to release in step 9.

4. Perform steps 5 through 8 in a fairly rapid succession.
5. Turn the ignition to the ON position (as far as you can go without starting the engine.)
6. Turn the ignition to the OFF position.
7. Turn the ignition to the ON position (as far as you can go without starting the engine.)
8. Turn the ignition to the OFF position.
9. Release the power UNLOCK button on the door panel. The vehicle should respond by
door locks locking and unlocking automatically. (If locks do not cycle after you let go,
not before you let go of the unlock button, then the vehicle has not entered programming
mode and you must start procedure over. Remove key from ignition, open drivers door
and return to step 1 ). If the locks do cycle automatically then proceed to step 10.

10. Hold down the LOCK and UNLOCK buttons on the remote until the doors lock and
unlock. This may take up to 30 seconds.

11. Repeat step 10 NOW for each additional remote. (Including any existing remotes).
12. Turn the ignition to the ON position to exit the programming mode.
13. Test remote(s).

Mar 20, 2012 | 2003 Chevrolet TrailBlazer

1 Answer

Trailblazer dor locks


try this procedure, close all doors, insert key into ignition switch,press and hold door unlock switch,turn ignition switch from on to off twice, release door unlock switch,doors will lock then unlock to confirm programming mode.now simultaneously press and hold the lock and unlock buttons of the first remote transmitter after approximately 15 seconds doors will lock then unlock to confirm remote transmitter programming. if all fails to work take vechicle to dealership, they will have to use diagnostic equipment to reprogram remote.

Feb 12, 2012 | Cars & Trucks

1 Answer

2002 chevy trailblazer interior lights won't shutoff and doors won't lock or unlock with remote, rear hatch won't lock.


sound like you might have a few problem interior light might be the door switch but the lock n unlock can be a fuse if they dont work in the truck or need to chance the battery in your remote

Nov 07, 2010 | 2002 Chevrolet TrailBlazer

2 Answers

I have a 98 GMC JIMMY. Remotes and Dome Lights stopped working. Car would start then immediately die. Took it to the dealer and they stated it was the Body Control Modual (BMC). Picked up the vehicle...


Keyless Entry System Circuit Description
The Power Door Locks/Remote Keyless Entry control system provides several functions. The driver operates the vehicle door locks and rear window release from outside the vehicle using a hand-held radio transmitter. The transmitter sends coded signals to the remote control door lock receiver. The remote control door lock receiver detects and decodes the signal from the transmitter. The remote control door lock receiver issues signals to the body control module (BCM) through a serial data link. The BCM actuates relays to lock and unlock the doors and liftgate. The BCM can also release the liftglass. The power door lock switches provide manual control of the door locks.


Transmitter Programming
Important: Different keyless entry systems are used on General Motors vehicles. The parts are not interchangeable even though the parts may appear to be similar. Observe the back of the transmitter in order to properly identify the system. On 1998 S/T pickups and utilities, use a transmitter identified with GM/UTA preceding the part number.
With the driver door closed, hold down the power unlock button on the door panel.
Turn the ignition switch to the ON position.
Turn the ignition switch to the OFF position.
Turn the ignition switch to the ON position.
Turn the ignition switch to the OFF position.
Release the power unlock button on the door panel.
The remote control door lock receiver will respond in the following manner in order to indicate that the receiver is in the programming mode:
6.1. Locking the doors
6.2. Unlocking the doors
Important: All extra transmitters must be programmed at this time. When a new transmitter is programmed, it will deactivate the old transmitters.
Hold down the lock and unlock buttons on the transmitter until the remote control door lock receiver will respond in the following manner:
7.1. Locking the doors.
7.2. Unlocking the doors.
Repeat step 7 for each additional transmitter.
Turn the ignition switch to the ON position in order to exit the transmitter programming mode.

May 04, 2017 | 1998 GMC Jimmy

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2004 Chevy Trailblazer - Randomly the liftgate does not unlock. Have to crawl in the back and manually release the lock through the small access hole. Doesn't seem to matter how many times I cycle through...


That's one of those thing you will need to look at. check the electric solenoid to make sure it has a good ground and "hot" connection. Also make sure that the lock mechanism is operating freely and not binding.

Jun 21, 2009 | 2002 Nissan Altima

2 Answers

How do u program a new key fob for a 2004 chevy Malibu


Close all the vehicle doors.
Insert the ignition key into the ignition lock cylinder.
Press and hold the DOOR unlock switch.
While holding the DOOR lock switch in the unlock position, cycle the ignition ON, OFF, ON, OFF.
Release the DOOR unlock switch. The doors will lock and unlock to confirm the program mode.
Press and hold the LOCK button and the UNLOCK button simultaneously on one keyless remote. After a delay of approximately 15 seconds , the doors will lock and unlock to confirm the programming of that transmitter.
Repeat the previous step to program up to four transmitters.
Turn the ignition switch to the RUN (one more click forward) position in order to exit the keyless entry transmitter mode.
Operate the transmitter functions in order to verify correct system operation

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2 Answers

Program fob


Instructions to program a keyless entry remote for a Chevy Silverado. They also work on 2003, 2004 and 2006 Suburbans.
  1. Close all the vehicle doors.
  2. Insert the ignition key into the ignition lock cylinder.
  3. Press and hold the DOOR unlock switch.
  4. While holding the DOOR lock switch in the unlock position, cycle the ignition ON, OFF, ON, OFF.
  5. Release the DOOR unlock switch. The doors will lock and unlock to confirm the program mode.
  6. Press and hold the LOCK button and the UNLOCK button simultaneously on one keyless remote. After a delay of approximately 15 seconds, the doors will lock and unlock to confirm the programming of that transmitter.
  7. Repeat the previous step to program up to four transmitters.
  8. Turn the ignition switch to the RUN (one more click forward) position in order to exit the keyless entry transmitter mode.
  9. Operate the transmitter functions in order to verify correct system operation

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you will have to write your vehicles vin number down wich is if you look throught the windshild on the drivers side you will see it its a little plate with numbers but right down the vin number and take you drivers license and Registration with you to the chevy dealer ship and request the remote for that vehicle. and they should be able to get you one. as far as i know the remote is the only way to get the alarm off. I hope this helps you

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1 Answer

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Sound like the door actuators are bad if you take it somewhere take it to a dealer auto body shop Its Cheaper

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those remotes need to be set with the obd system.
some cars you can program the remote by turning on and off the ignition,or in other cases the key in and out until the hazards flash,then hit a button and done.
yours has to be set at the dealer

Dec 16, 2008 | 2005 Chevrolet Trailblazer Ext

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