Here is a description of the courtesy lights , there is no relay ! Controlled by the BCM - body control module !
The courtesy/illuminated entry lamps, may be manually turned on or off by placing the interior lamp switch in the ON or OFF position. If an outside door handle is lifted or a door is opened, the courtesy/illuminated entry lamps illuminate. After all the doors have been closed the courtesy/illuminated entry lamps will remain illuminated approximately 15 seconds. The courtesy/illuminated entry lamps will also turn on prior to any door being opened, and remain illuminated approximately 40 seconds when the driver removes the ignition key. When the driver places the dome lamp defeat switch in the OFF position, the courtesy/illuminated entry lamps will be disabled.
The left and right front door courtesy lamps are controlled, and receive voltage and ground from the drivers door module (DDM) and the passenger door module (PDM) respectively. The body control module (BCM), DDM, and the PDM communicate through class 2 serial data for the lamp illumination commands and the door ajar switches.
The remaining courtesy lamps are controlled and receive voltage from the BCM. Voltage for the courtesy lamp supply voltage circuit and the backup lamp supply voltage circuit is from the TBC B fuse in the instrument panel fuse block directly through the BCM to these circuits. A short to ground on either of these circuits will open the fuse. Ground is provided to the footwell lamps and all courtesy/reading lamps at G203. Ground is provided to the right middle and right rear door at G306. Ground is provided to the left middle and left rear door at G302.
SOURCE: Courtesy lights blow 20 AMP fuse #3
check the wiring under the carpet and to turn off the day time running lights just pull the drl fuse
SOURCE: locations of grease fittings on 2006 yukon slt
try these websites to see if they have the information you need www.autozone.com and the other one is www.alldatadiy.com and if all fails stop by your local library and get your hands on a haynes auto repair manual for your truck and i also would like to give you this information as well if you every have any hard to find GM-parts they only sells GM-parts its Schram auto & truck parts 1-800-292-1032 and they website is www.schramauto.com
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: 2004 gmc yukon slt locked keys inside car
Any GM car dealer can cut a duplicate key for your car for about $10. You have to show them a picture ID, and the car ownership (TITLE). This key, without the transponder chip, will let you unlock the car but won't start it. Just tell them that you need a plain car key, without the transponder chip.
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