GMC Yukon 1993 - ELECTRICAL COMPONENT LOCATOR 1993 ELECTRICAL COMPONENT LOCATIONS General Motors Corp. - Electrical Components

GMC Yukon 1993 - BUZZERS, RELAYS & TIMERS

GMC Yukon 1993 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
A/C Clutch Relay	On top of A/C-heater housing, behind right side of dash.
Auxiliary Battery Relay	On left front inner fender panel, above wheelwell.
Auxiliary Cooling Fan Relay	On left front inner fender panel, near firewall.
Blower Relays (High/Low)
Front	On top of front A/C-heater blower housing.
Rear	On auxiliary A/C-heater blower housing.
Cold Advance Relay (6.2L Diesel)	On right rear of engine compartment, near battery junction block. See Fig. 1.
Daytime Running Light (DRL) Relay	Behind left side of dash, below DRL module.
Foglight Relay	Behind left side of dash, above convenience center.
Fuel Pump Relay
4.3L California	On right side of firewall, near battery junction block cover. See Fig. 2.
4.3L Federal	On right side of firewall, near battery junction block cover. See Fig. 3.
5.0L & 5.7L A/T & M/T	On right side of firewall, near battery junction block cover. See Fig. 4.
7.4L A/T & M/T	On right side of firewall, near battery junction block cover. See Fig. 5.
6.2L Diesel	On right side of firewall, near battery junction block cover. See Fig. 1.
Hazard Flasher Relay	Under left side of dash, near convenience center.
Horn Relay	On convenience center.
Power Amplifier Relay	Under left side of dash, on left of brake pedal bracket.
Power Door Lock Relay	Under left side of dash, on right of brake pedal bracket.
Rear Window Release Relay	Behind left side of dash, above steering column.
Transfer Case Relay (K3500 Only)	On right side of firewall, near battery junction block cover.
Turn Signal Flasher Relay	On convenience center.

GMC Yukon 1993 - CIRCUIT PROTECTION DEVICES

GMC Yukon 1993 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Circuit Breakers	On fuse block.
Battery Junction Block	On right side of firewall.
Convenience Center	Under left side of dash.
Fuel Pump In-Line Fuse
5.0L & 5.7L A/T & M/T	On right side of firewall, near fuel pump relay. See Fig. 4.
Fuse Block
4.3L California	Under left side of dash. See Fig. 2.
4.3L Federal	Under left side of dash. See Fig. 3.
5.0L & 5.7L A/T & M/T	Under left side of dash. See Fig. 4.
7.4L A/T & M/T	Under left side of dash. See Fig. 5.
6.2L Diesel	Under left side of dash. See Fig. 1.
Fusible Links	At battery junction block.
Power Mirror In-Line Fuse	Taped to crossbody harness under right side of dash.

GMC Yukon 1993 - CONTROL UNITS

GMC Yukon 1993 CONTROL UNITS LOCATION

Component	Location
ABS Diode Module	Under left side of dash.
ABS Module	Mounted on side of brake master cylinder.
Audio Alarm Module	On convenience center.
Coolant Level Sensor Module	Behind center of dash.
Cruise Control Module	On left side of firewall, near brake booster.
Daytime Running Lights (DRL) Module	Behind left side of dash, taped to panel wiring harness.
Diesel Elec. Control (DEC) Module (6.2L Diesel)	Behind right side of dash. See Fig. 1.
Glow Plug Controller (Diesel)	On left rear of intake manifold.
Hot Fuel Handling Module
5.7L HD	Behind right side of dash, above blower motor. See Fig. 4.
7.4L A/T & M/T	Behind left side of dash, behind brake booster. See Fig. 5.
Ignition Control Module	On center rear of engine, near ignition distributor.
Knock Sensor Module (M/T)
5.0L & 5.7L A/T & M/T	On top right of engine. See Fig. 4.
7.4L A/T & M/T	On top right of engine. See Fig. 5.
Powertrain Control Module (PCM)
4.3L California	Behind right side of dash, above blower motor. See Fig. 2.
4.3L Federal	Behind right side of dash, above blower motor. See Fig. 3.
5.0L & 5.7L A/T & M/T	Behind right side of dash, above blower motor. See Fig. 4.
7.4L A/T & M/T	Behind right side of dash, above blower motor. See Fig. 5.
Radio Receiver Module	Behind center of dash.
Transmission Control Module (TCM)	Behind right side of dash.
Wiper Motor Module
Front	On firewall, behind wiper motor.
Rear	On lower inner center of rear window.

GMC Yukon 1993 - SENDING UNITS & SENSORS

GMC Yukon 1993 SENDING UNITS & SENSORS LOCATION

Component	Location
Barometric Pressure Sensor	On top left of firewall.
Coolant Level Sensor	On top right side of radiator.
Coolant Temp. Sending Unit/Switch	On front of left cylinder head.
Coolant Temperature Sensor
4.3L California	On top right front of intake manifold, near thermostat housing. See Fig. 2.
4.3L Federal	On top right front of intake manifold, near thermostat housing. See Fig. 3.
5.0L & 5.7L A/T & M/T	On top right front of intake manifold, near thermostat housing. See Fig. 4.
7.4L A/T & M/T	On top right front of intake manifold, near thermostat housing. See Fig. 5.
Engine Speed Sensor (6.2L Diesel)	On top rear of engine. See Fig. 1.
Fuel Pump
Diesel	Inside left frame rail, under cab.
Gasoline	Inside fuel tank.
Input Speed Sensor	On left front side of transmission.
Knock Sensor
4.3L California	On lower left side of engine, under exhaust manifold. See Fig. 2.
4.3L Federal	On lower left side of engine, under exhaust manifold. See Fig. 3.
5.0L & 5.7L A/T & M/T	On lower right front of engine, under exhaust manifold. See Fig. 4.
7.4L A/T & M/T	On lower right of engine, near starter. See Fig. 5.
Low Coolant Sensor	On right rear side of radiator.
Manifold Abs. Press. (MAP) Sensor
6.2L Diesel	On left side of firewall, near wiper motor. See Fig. 1.
4.3L California	On top right of engine. See Fig. 2.
4.3L Federal	On top right of engine. See Fig. 3.
5.0L & 5.7L A/T & M/T	On top right of engine. See Fig. 4.
7.4L A/T & M/T	On top right of engine. See Fig. 5.
Output Speed Sensor (A/T)	On left rear side of transmission.
Throttle Position (TP) Sensor
6.2L Diesel	On injection pump throttle valve. See Fig. 1.
4.3L California	On throttle body assembly. See Fig. 2.
4.3L Federal	On throttle body assembly. See Fig. 3.
5.0L & 5.7L A/T & M/T	On throttle body assembly. See Fig. 4.
7.4L A/T & M/T	On throttle body assembly. See Fig. 5.
Vehicle Speed Sensor (VSS)
4.3L California	On left side of transmission. See Fig. 2.
4.3L Federal	On left side of transmission. See Fig. 3.
5.0L & 5.7L A/T & M/T	On left side of transmission. See Fig. 4.
7.4L A/T & M/T	On left side of transmission. See Fig. 5.
6.2L Diesel	On left side of transmission. See Fig. 1.
Water-In-Fuel Sensor (Diesel)	In fuel filter assembly, on center rear of engine.
Wheel Speed Sensors	On left and right front wheel hub assembly.

GMC Yukon 1993 - MOTORS

GMC Yukon 1993 MOTORS LOCATION

Component	Location
A/C Inlet/Mode Door Motor	On front and rear (if equipped) A/C-heater housing.
Auxiliary Cooling Fan Motor	In front of radiator.
Blower Motor
Front	Under right side of dash.
Rear	Behind driver's seat, behind trim panel.
Vacuum Pump (Diesel 7.4L)	On right front of engine. See Fig. 5.
Washer Pumps (Front & Rear)	In washer fluid reservoir, near left shock tower.
Wiper Motor (Front)	On left center of firewall.

GMC Yukon 1993 - SOLENOIDS & SOLENOID VALVES

GMC Yukon 1993 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
AIR By-Pass Solenoid (4.3L)
4.3L Federal	On lower right front of engine. See Fig. 3.
7.4L A/T & M/T	On lower right front of engine. See Fig. 5.
Canister Purge Solenoid (4.3L California)	On right side of engine. See Fig. 2.
Cold Start Advance Solenoid (Diesel)	On injection pump, on top right front of engine.
EGR Elec. Vacuum Regulator Solenoid
5.0L & 5.7L A/T & M/T	On top of right valve cover. See Fig. 4.
7.4L A/T & M/T	On top of right valve cover. See Fig. 5.
EGR Pulse Solenoid	On top left rear of engine.
EGR Vacuum Solenoid
4.3L Federal	On top left of engine. See Fig. 3.
5.0L & 5.7L A/T & M/T	On top left of engine. See Fig. 4.
6.2L Diesel	On top left of engine. See Fig. 1.
EGR Vent Solenoid (6.2L Diesel)	On top left rear of engine. See Fig. 1.
Exhaust Pressure Regulator (EPR) Valve	On top left rear of engine. See Fig. 1.
Exhaust Pressure Regulator (EPR) Fast Idle Solenoid	On injection pump, on right top front of engine. See Fig. 1.
Front Axle Solenoid	On right rear side of front differential case.
Fuel Shutoff Solenoid (Diesel)	On injection pump, on top front of engine.
Idle Air Control (IAC) Valve
4.3L California	On throttle body assembly. See Fig. 2.
4.3L Federal	On throttle body assembly. See Fig. 3.
5.0L & 5.7L A/T & M/T	On throttle body assembly. See Fig. 4.
7.4L A/T & M/T	On throttle body assembly. See Fig. 5.
Rear Window Release Solenoid	Behind panel, center of tailgate.

GMC Yukon 1993 - SWITCHES

GMC Yukon 1993 SWITCHES LOCATION

Component	Location
A/C Pressure Cycling Switch	On A/C accumulator.
Auxiliary Cooling Fan Switch	On right cylinder head, near spark plug.
Back-Up Light Switch (M/T)	On left side of transmission.
Brake Pressure Warning Switch	In hydraulic brake combination valve, near master cylinder.
Brake/Cruise/Stoplight Switch	On top of brake pedal bracket.
Clutch/Start Switch	On top of clutch pedal bracket.
Fast Idle Temp. Switch (Diesel)	On right rear of engine, above starter.
Front Axle Solenoid Switch	Near differential case, at front of engine.
Oil Pressure Switch
4.3L California	On top rear of engine, near distributor. See Fig. 2.
4.3L Federal	On top rear of engine, near distributor. See Fig. 3.
5.0L & 5.7L A/T & M/T	On left rear of engine, near distributor. See Fig. 4.
6.2L (Diesel)	On top rear of engine.
7.4L A/T & M/T	On lower left front of engine. See Fig. 5.
Park/Neutral/Backup Light Switch	On steering column, under dash.
Parking Brake Switch	On parking brake pedal bracket.
Seat Belt Retractor Switch	On driver's seat belt buckle.
Transfer Case Switch	On left front of transfer case.

GMC Yukon 1993 - MISCELLANEOUS

GMC Yukon 1993 MISCELLANEOUS LOCATION

Component	Location
Blower Motor Resistor	On front and rear (if equipped) blower motor housing.
Data Link Connector (DLC)
4.3L California	Under left side of dash, left of steering column. See Fig. 2.
4.3L Federal	Under left side of dash, left of steering column. See Fig. 3.
5.0L & 5.7L A/T & M/T	Under left side of dash, left of steering column. See Fig. 4.
7.4L A/T & M/T	Under left side of dash, left of steering column. See Fig. 5.
6.2L Diesel	Under left side of dash, left of steering column. See Fig. 1.
Fuel Heater (Diesel)	On fuel filter assembly.
Fuel Pump Test Connector
4.3L California	On right side of firewall, near battery junction block. See Fig. 2.
4.3L Federal	On right side of firewall, near battery junction block. See Fig. 3.
5.0L & 5.7L A/T & M/T	On right side of firewall, near battery junction block. See Fig. 4.
7.4L A/T & M/T	On right side of firewall, near battery junction block. See Fig. 5.
Power Amplifier	Under driver's seat.
Vehicle Speed Sensor Buffer
4.3L California	Behind right side of dash. See Fig. 2.
4.3L Federal	Behind right side of dash. See Fig. 3.
5.0L & 5.7L A/T & M/T	Behind right side of dash. See Fig. 4.
7.4L A/T & M/T	Behind right side of dash. See Fig. 5.