double check the info from the 03 with a meter, it may be the same.....
Make: GMC
Model: Yukon
Year: 2003
Alarm
Constant 12 volts RED (2) IGNITION SWITCH HARNESS
Ignition 12 volts PINK IGNITION SWITCH HARNESS
Starter YELLOW IGNITION SWITCH HARNESS
Dome Light GRAY/BLACK (+) AT UNDERDASH LIGHT
Trunk Pin Switch
Parking Lamp BROWN (+) DRIVERS KICK PANEL **
Power Lock GRAY SEE TECH NOTES
Power Unlock TAN FOR DOOR LOCK INFO
** Parking Light Wire Has Also Been Found As A BROWN / WHITE (+) High In Kick Or VIOLET (-) At Headlight Switch.
Accessories
Window Up D\ BLUE P\ LT BLUE D\ BLUE P\BLUE @ Each Switch Due
Window Down F/ BROWN F/ TAN R/ BROWN R/BROWN To Data Link #211
Ign Key Warn LIGHT GREEN (-) IGNITION SWITCH HARNESS
Trunk Release
OEM Horn BLACK (-) STEERING COLUMN HARNESS
Headlights WHITE (-) AT HEAD LIGHT SWITCH
OEM Alarm Arm
OEM Alarm Disarm LT GREEN (-) AT DOOR MODULE INSIDE DRIVERS DOOR
#211 See Reversal Rest At Ground Type Window Circuit Wiring Diagram OEM Hood Pin Wire Is PINK/BLACK @ Switch On Top Of Radiator Support
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Good Luck
David
Ace Security
813-376-9778
Tampa
Donate to the 12volt
Remote Start
Tach Signal WHITE AT PCM * #238
Ignition #2 WHITE IGNITION SWITCH HARNESS
Ignition #3 ORANGE IGNITION SWITCH HARNESS
Accessory BROWN IGNITION SWITCH HARNESS
Neutral Safety WHITE (-) PCM CONN C3 PIN #13 *
Brake Light WHITE (+) AT SWITCH ABOVE BRAKE PEDAL
Reverse Light LIGHT GREEN (+) EITHER TAIL LT ASSY OR TRAILER CONN
Rear Window Defrost
*PCM Located On The Drivers Side Of The Motor. Tach Wire Is In The BLUE Conn (C1) Closest To The Firewall,Pin #49. Also Found Back Of Cluster in 24 pin GREY Conn Pin # A12 #238- See G.M. Passlock II Bypass Diagram
-------------
Good Luck
David
Ace Security
813-376-9778
Tampa
Donate to the 12volt