Gmc  Full Size Pickup  1993-1994
 PART   COLOR  LOCATION
 12 VOLT CONSTANT   RED (+)   @ IGNITION SWITCH HARNESS
 STARTER  YELLOW (+) or PURPLE (+)  @ IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  PINK (+)  @ IGNITION SWITCH HARNESS
 IGNITION 2  N/A  
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  ORANGE (+)  @ IGNITION SWITCH HARNESS
 ACCESSORY/HEATER BLOWER 2  N/A  
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  N/A  
 PARKING LIGHTS ( + )  BROWN (+)  @ HEADLIGHT SWITCH or FUSE PANEL
 POWER LOCK  LIGHT BLUE (TYPE C), See NOTE #1  IN EITHER DOOR BOOT
 POWER UNLOCK  BLACK/RED (TYPE C), See NOTE #1  IN EITHER DOOR BOOT
 DOOR TRIGGER  WHITE (-)  @ HEADLIGHT SWITCH
 DOMELIGHT SUPERVISION  USE DOOR TRIGGER, (Requires Part#775 Relay)  
 TRUNK RELEASE  N/A  
 SLIDING POWER DOOR  N/A  
 HORN  BLACK (-)  @ STEERING COLUMN HARNESS
 TACH  WHITE, See NOTE #3  @ ECM, See NOTE #3
 WAIT TO START LIGHT  See NOTE #4  
 BRAKE  WHITE (+)  @ SWITCH ABOVE BRAKE PEDAL
 FACTORY ALARM DISARM   N/A  
 ANTI-THEFT  N/A  
 EXTRA INFORMATION
 NOTE #1: if vehicle is a 2-Door, it has a TYPE C Door Lock System, if vehicle is a 4-Door, it has a TYPE A Door Lock System. NOTE #2: the ECM is located behind the Glove Box. NOTE #3; THE DIESEL TACH wire is a WHITE (AC) at the Instrument cluster. NOTE #4: when hooking up a remote starter, if you cannot get the (+) or (-) Wait to Start wire on the Remote Starter to work properly, you will then need to disconnect this wire and Program the Remote Starter for the 5, 10, 15 or 20 Second Wait to Start Timer in the Installation manual.