2003 GMC Safari Owner's Manual - Page 314

Relays Usage A/C Relay Rear/Heat and Air Conditionina (Rear Heat and A/C) Upfitter-ACCY Upfitter Accessory Relay Starter Enable Starter Relay A/C Enable Air Conditioning Relay Headlamps Headlamps Relay Fuel Pump Fuel Pump Relay Fuse/Circuit Breaker UPFITTERBATT UPFITTERACCY used Spare Not used Spare Not Usage Upfitter Battery Power Stud, Trailer Wiring Harness Upfitter Accessory Relay Fuse/Circuit Breaker Spare ECM-1B HORN A/C COMP RR HTR/AC ATC FRT HVAC ENG-I Usage Not used Fuel Pump Relay and Motor, VCM, Oil Pressure Switch/Sender Horn Relay and Horn Air Conditioning Enable Relay and Compressor Rear Heater and Air Conditioning Active Transfer Case-L Van Front Heater and Air Conditioning Oxygen Sensors, Camshaft Position Sensor, Mass Air Flow Sensor, Evaporative Emission Canister Vent Solenoid Air Conditioning Enable Relay Coil Fuel Injectors 1-6, Crankshaft Position Sensot, VCM, Coil Driver Module (EST), Ignition Coil Not Used Right Headlamp Left Headlamp Not Used Not Used IGN-E ECM-I Blank RH HDLMP LH Headlamp Blank Blank 5-97