How to replace 2003 denali door lock relay

SOURCE: 2003 yukon denali---relay locate for blower

the relay is built into the speed resistor or motor control module ) depends if you have automative or manual heater controls. is automatic it will be motor control module and manual is the resistor module. these units are located beside the heate fan motor. the motor helps keeps the unit cool. just unbolt the module, unplug it and install new one. Just check to make sure the connector is good.. The heat created by the connection sometimes melts the power or ground leads (red or black) and if this is so you will need to replace the pin.

SOURCE: 2003 yukon 2rear doors and tailgate door wont lock

Sometimes you need to look past the obvious. If it happens again, remove the fuse panel and check the wires where they join with the connectors for the relay... these are crimped connections and can easily corrode under certain conditions.
Glad you have it working again!!

Testimonial: "removed fuses and relays.cleaned and replaced,working great now.thank you. "

SOURCE: 02 GMC Denali XL 6.0L drver's side door lock was

Why bother replacing it? They'll just break it again and you'll be back to where you are now in the future.

Best thing is to have the dealership order you the cover for the passenger side and replace it so that the "theives" don't try and break it again; save you a lot of $$$. Also, change the alarm; standard is a joke!

SOURCE: I have a 2003 GMC Yukon Denali. My problem is that

TRY THIS REPROGRAMMING PROCEDURE.OBTAIN ALL REMOTE TRANSMITTERS, CLOSE ALL THE DOORS, INSERT KEY INTO THE IGNITION,DO NOT TURN THE IGNITION SWITCH,PRESS AND HOLD DOOR LOCK SWITCH IN THE UNLOCK POSITION, SWITCH IGNITION ON OFF ON OFF,RELEASE DOOR LOCK SWITCH,SYSTEM SHOULD NOW LOCK AND UNLOCK VECHICLE INDICATING PROGRAMMING MODE ACTIVATED. NOTE FOR THE EXISTING REMOTE TRANSMITTER MEMORY POSITIONS WILL BE OVERWRITTEN, PRESS AND HOLD LOCK AND UNLOCK BUTTONS FIRST REMOTE TRANSMITTER FOR 15 SECONDS, SYSTEM WILL LOCK AND UNLOCK VECHICLE INDICATING REMOTE TRANSMITTER PROGRAMMED.REPEAT THIS PROCEDURE FOR REMAINING REMOTE TRANSMITTER.YOUR VECHICLE CAN ONLY HAVE NO MORE THAN 4 REMOTE TRANSMITTERS.

SOURCE: 2003 Denali alarm will not actativte after I lock

put key in turn switch forward find your valet switch for alarm should be a button press it twice or the button might be your alarm blinking light, press.