Remote entry system on 2002 GMC truck stopped functioning. remotes are transmitting, still problem. Any suggestions

yes it needs the fob, Keyless Entry Remote Fob Clicker for 2002 Mazda Protege5 With Do It...



2002 Mazda Protg Keyless Remote Key Fob
http://www.fobkeyless.com/2002-mazda-protege-keys-remotes-replacement.html

take it to the garage

There are ways to test it but how do you know that it is transmitting a signal? Batteries are new in the remote also right?

The keyless entry matches to the module for it that is mounted under the dash. It may have gone bad since your remote will not function. Of course it could be your remote as well that went bad

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.

the keyless entry does not have a fuse itself however the vehicle has a iod, or storage fuse, that will disable the keyless system but other accessories wont function, the dome light , clock, or radio, if those items work then the fuse is good. check the remote itself, the dealer can check the remote n/c, if the remote is ok than the relay can be bad or the alarm module, best advice, take it to the dealer, they will know whats wrong with it and it wont cost too much to diag .

This link will take you to very good instructions try it worked for me www.wikihow/program-a-keyless-entry-for-a-chevy-silverado this works on GMC models also.

WITH KEY IN DRIVER'S DOOR LOCK/UNLOCK DOOR TWICE. THIS SHOULD OVERRIDE ALARM SYSTEM. STRONGLY SUGGEST BUYING KEYLESS ENTRY FOB.

Sounds like you need a new keyless entry box, but forst try resetting the computer, by taking the positive battery cable off for 10 mins.

If that does not work then seek geting the box for the keyless entry replaced.

Driver door module is where to look also a broken or corroded wire and if you use your key to punch in the door code then the key pad has a hole in it or it just went bad it's not the remote control also check the master door lock switch for corrosion at the pins and the plugs same with the driver door module