1999 GMC Envoy Owner's Manual - Page 309

yellowblue Name HORN BTSI B/U LP DRL IGN B RAP LD LEV OXYSEN MIR/LKS FOG LP IGN E IGN A STUD #2 PARKLP LR PRK Usage Horn Brake-Transmission Shift Interlock Back-Up Lamps Daytime Running Lamps (If Equipped) Column Feed, IGN 2, 3, 4 Retained Accessory Power Electronic Load Leveling Oxygen Sensor Mirrors, Door Locks Fog Lamps Engine Starting and Charging, IGN 1 Accessory Feeds, Electric Brake Parking Lamps Left Rear Parking Lamps HTDMIR ATC STOPLP RR W/W Name IGN C HTDSEAT HVAC TRCHMSL HIBEAM RRDFOG TBC CRANK HAZLP VECHMSL Usage Starter Solenoid, Fuel Pump, PRNDL Heated Seats HVAC System Trailer Center High-Mounted Stop Light High-Beam Headlamps Rear Defogger Truck Body Computer Clutch Switch, NSBU Switch Hazard Lamps Vehicle Center High-Mounted Stop Lamp Heated Mirror Automatic Transfer Case Stoplamps Rear Window Wiper 6-59