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Keyless entry no longer works, back hatch door doesn't lock now

My alarm started to intermittently work, till it now no longer works. Now that it doesn't work I have to lock my 05 chevy trailblazer manually, but now the automatic locks do not lock the back hatch, the alarm shows that it is setting on the dash when I lock and shut the doors. But the back door never locks.
Also my fuel gauge also does not work, after filled up 3 months ago my fuel gauge starts at empty then as I burn off fuel it goes to the F. Now it bounces all over the place.
Also my lights blink intermittently when driving sometimes, this has happened since I bought it 3 years ago and is only getting worse.
Also the line to my rear wiper shoots water all over the place, I have only used it a handful of times.
This is the worst vehicle ever...I have had to replace my stereo, waterpump and a pulley, belts, body seal on left hand side of car, 3 GM fuel caps that wouldn't seal properly because of poor design, the whole ingnition system and electical with the ignition system because it fried in the middle of driving. All this in 3 years of ownership and putting 26K miles on it!!

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
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Posted on Jan 02, 2017

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  • 206 Answers

SOURCE: The auto door lock feature dose not work.

There is 3 relays in one of the fuse panels that are labeled doorlocks one of them is probably bad. Push the door lock button and find the one that is clicking this is the one that is back. This should fix your problem

Posted on Mar 01, 2009

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  • 59 Answers

SOURCE: The Rear Wipers on my 2001 1500 Chevy Suburban Stopped working

Unplug the connector at the rear wiper motor, turn the switch on and probe the wires with a test lamp, if you have power back there you more than likely have a bad motor. If there is no power start checking fuses they are all labeled easily on the back side of the fuseblock covers both on the dash and underhood. Good Luck!!!

Posted on Mar 15, 2009

  • 340 Answers

SOURCE: Nothing works,door locks, lights, no noise of any

security system failure will shut everything down
(IT THINKS IT IS BEENING STOLEN) an locked it self out

Posted on Mar 03, 2010

  • 132 Answers

SOURCE: I bought a Chevy Trailblazer, used, had keyless

You need to find the black push button called the valet button. That is the overide. Get in the car turn the key to IGN as the alarm is going off and then you have either 5 or 10 seconds to push that button once and then 2-5 seconds later the alarm is shut off. To put the car into valet mode which means no alarm at all you put the key to IGN push that button once then pull key out at which point the blue light should turn solid blue.

Or option two is you open a door and hit the lock, then unlock, then lock button again on the remote and the blue led will be solid which means no crazy alarm.

Posted on Apr 04, 2010

  • 15 Answers

SOURCE: good afternoon....what would cause my 2008 Chevy

It could be the power lock motor. You could have a short or bad wiring harness. Might just be a fuse that connects to both. But since you said it's only the driver side. When the power lock motor is bad it can trigger your alarm because they're wired together.

Hope that helps. Good luck.

Posted on Apr 06, 2010

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How do I reset keyless door entry that is in lock out mode


Viper Keyless Entry Systems

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Viper is the industry leader in keyless entry systems. Add the convenience of keylessentry to virtually any vehicle - even vehicles without power door locks!

Alarms, Remote Car Starters, Keyless Entry & Locks - JC ...

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Keyless Entry System Description and Operation - Active
The keyless entry system is a vehicle entry device. The keyless entry system is used in conjunction with the door locks to unlock the vehicle. Keyless entry will lock/unlock a door or open the rear compartment lid when a corresponding button on the keyless entry transmitter is pressed. This is accomplished by the transmitter sending a radio frequency to the remote control door lock receiver (RCDLR). The RCDLR interprets the signal and activates the requested function via a serial data message. A low transmitter battery or radio frequency (RF) interference from aftermarket devices, such as 2-way radios, power inverters, computers, etc., may cause a system malfunction. High RF traffic areas, such as gas stations that use pay-at-the-pump RF transponders, may also cause interference that could lead to a malfunction. Keyless entry allows you to operate the following features:
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The keyless entry system is a vehicle entry device. The keyless entry system is used in conjunction with the body control module (BCM) to remotely activate certain vehicle features. Keyless entry will lock/unlock the doors, or release the rear compartment lid when a corresponding button on the keyless entry transmitter is pressed. This is accomplished by the transmitter sending a radio frequency to the remote control door lock receiver (RCDLR). The RCDLR interprets the signal and activates the requested function via a serial data message to the BCM. A low transmitter or vehicle battery or radio frequency (RF) interference from aftermarket devices, such as 2-way radios, power inverters, computers, etc., may cause a system malfunction. High RF traffic areas may also cause interference that could lead to a malfunction. Keyless entry allows you to operate the following components:
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I have had this problem take you drivers door put your key and un-lock from the out side with key (NO) then open the door push un-lock from the inside button and then set from you remote and it should set if not push un-lock then lock and then do the un-lock with the key. Let me know if that works. what my car did was locked from the inside and I had the problem were it would not work till I un-locked from the out side plus I had to go to radio shack and change the battery from the control.
Hope good happens.
Nikki2913

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Keyless entry stopped working on 05 cobalt now i have to unlock door with the key and when i do that the alarm goes off. Help


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