BUZZERS, RELAYS & TIMERS
| Component | Component Location |
|---|---|
| A/C Compressor Clutch Relay | In engine wiring harness junction block. |
| Air Injection Reaction Relay | In underhood fuse/relay center. |
| Auxiliary Battery Relay | On right side of A/C accumulator, attached to firewall. |
| Blower Motor Resistor/Relay Assembly | On HVAC module, near blower motor. |
| Compressor Motor Relay | On left side of engine compartment, below engine wiring harness junction block. |
| Courtesy Lamp Relay | In body wiring harness junction block. |
| Daytime Running Lamp (DRL) Relay | In engine wiring harness junction block. |
| Door Lock Relay | In fuse block. |
| Door Unlock Relay | In fuse block. |
| Driver Door Unlock Relay | In fuse block. |
| Fog Lamp Relay | In engine wiring harness junction block. |
| Fuel Pump Relay | In engine wiring harness junction block. |
| Headlamp Relay | In engine wiring harness junction block. |
| Horn Relay | In engine wiring harness junction block. |
| Ignition Relay | In engine wiring harness junction block. |
| Inadvertent Power Relay | In body wiring harness junction block. |
| Parklamp Relay | In body wiring harness junction block. |
| Puddle Lamp Relay | In body wiring harness junction block. |
| Rear Window Defogger Relay | In engine wiring harness junction block. |
| Retained Accessory Power Relay | In fuse block. |
| Retained Accessory Power 2 Relay | In I/P wiring harness junction block. |
| Roof Beacon Relay | Near left "B" pillar. |
| Secondary Air Injection Reaction Pump Relay | In engine wiring harness junction block. |
| Starter Relay | In engine wiring harness junction block. |
| Turn/Hazard Flasher | In fuse block. |
BUZZERS, RELAYS & TIMERS
CIRCUIT PROTECTION DEVICES
| Component | Component Location |
|---|---|
| Body Wiring Harness Junction Block | Under left side of dash, near kick panel. |
| Engine Wiring Harness Junction Block | At left side of engine compartment, near battery. |
| Fuse Block | On lower left side of dash. |
| I/P Wiring Harness Junction Block | On lower right side of dash. |
CIRCUIT PROTECTION DEVICES
CONTROL UNITS
| Component | Component Location |
|---|---|
| Automatic Transfer Case Control Module | Left side of dash, above headlight switch. |
| Body Control Module | On lower left side of dash, below steering column. |
| Cruise Control Module | In left rear of engine compartment, on firewall. |
| Electronic Brake Control Module (EBCM) | On left side of the inner frame. |
| HVAC Control Module | In center of dash, under radio. |
| Ignition Control Module (4.3L VIN W) | On right side top of engine, at ignition coil. |
| Inflatable Restraint Sensing & Diagnostic Module | Under driver's seat. |
| Power Sun Roof Module | Near rear of sun roof. |
| Powertrain Control Module (PCM) (4.8L VIN V) | On left front of engine compartment. (Схема №9) |
| Powertrain Control Module (PCM) (5.3L VIN T) | On left front of engine compartment. (Схема №9) |
| Powertrain Control Module (PCM) (6.0L VIN U) | On left front of engine compartment. (Схема №9) |
| Remote Control Door Lock Receiver | Behind top center of dash. |
| Suspension Control Module (RTD) | Rear of right rear wheelwell. |
| Throttle Actuator Control (TAC) Module | Near front of engine compartment. |
| Vehicle Communication Unit (VCU) | Behind left side of dash. |
| Vehicle Control Module (VCM) (4.3L VIN W) | On left front of engine compartment. (Схема №2) |
| Vehicle Interface Unit (VIU) | Behind right side of dash. |
CONTROL UNITS
MOTORS
| Component | Component Location |
|---|---|
| Blower Motor | Under right side of dash. |
| Encoder Motor | Inside of transfer case. |
| Front Axle Actuator/Switch | On right side of center on axle housing. |
| Fuel Pump/Level Sensor | In fuel tank. |
| Mode Door Motor | On left side of the HVAC module. |
| Rear Window Washer Pump | In washer fluid reservoir. |
| Recirculation Door Motor | On top center of the HVAC module. |
| Secondary Air Injection Reaction Pump | On right rear of engine compartment. (Схема №8) |
| Suspension Leveling Module | On right side of frame rail, in front of muffler. |
| Temperature Door Motor | Near bottom center of the HVAC module. |
| Throttle Actuator Control Motor | Near front of engine compartment. |
| Windshield Washer Pump | In washer fluid reservoir. |
MOTORS
SENDING UNITS & SENSORS
| Component | Component Location |
|---|---|
| Ambient Light Sensor | On top center of dash. |
| Camshaft Position (CMP) Sensor (4.3L VIN W) | In distributor. |
| Camshaft Position (CMP) Sensor (4.8L VIN V) | On top center rear of engine. |
| Camshaft Position (CMP) Sensor (5.3L VIN T) | On top center rear of engine. |
| Camshaft Position (CMP) Sensor (6.0L VIN U) | On top center rear of engine. |
| Crankshaft Position (CKP) Sensor (4.3L VIN W) | On bottom front of engine, near crank pulley. (Схема №10) |
| Crankshaft Position (CKP) Sensor (4.8L VIN V) | On lower right rear of engine block. (Схема №7) |
| Crankshaft Position (CKP) Sensor (5.3L VIN T) | On lower right rear of engine block. (Схема №7) |
| Crankshaft Position (CKP) Sensor (6.0L VIN U) | On lower right rear of engine block. (Схема №7) |
| Engine Coolant Temperature (ECT) Sensor (4.3L VIN W) | On left rear side of cylinder head. (Схема №3) |
| Engine Coolant Temperature (ECT) Sensor (4.8L VIN V) | On left front side of cylinder head. (Схема №5) |
| Engine Coolant Temperature (ECT) Sensor (5.3L VIN T) | On left front side of cylinder head. (Схема №5) |
| Engine Coolant Temperature (ECT) Sensor (6.0L VIN U) | On left front side of cylinder head. (Схема №5) |
| Engine Oil Pressure (EOP) Sensor (4.8L, 5.3L & 6.0L) | On top rear of engine, left of center. |
| Engine Oil Temperature Sensor (4.8L VIN V) | On left side of oil pan. (Схема №5) |
| Engine Oil Temperature Sensor (5.3L VIN T) | On left side of oil pan. (Схема №5) |
| Engine Oil Temperature Sensor (6.0L VIN U) | On left side of oil pan. (Схема №5) |
| Front Propshaft Speed Sensor | On left side of transfer case, at shaft output. |
| Fuel Pump/Level Sensor | In fuel tank. |
| Fuel Tank Pressure Sensor | In fuel tank. |
| Heated Oxygen Sensor (HO2S) (Bank 1 Sensor 1) | In left exhaust pipe before catalytic converter. |
| Heated Oxygen Sensor (HO2S) (Bank 1 Sensor 2) | In left exhaust pipe after catalytic converter. |
| Heated Oxygen Sensor (HO2S) (Bank 2 Sensor 1) | In right exhaust pipe before catalytic converter. |
| Heated Oxygen Sensor (HO2S) (Bank 2 Sensor 2) | In right exhaust pipe after catalytic converter. |
| Inflatable Restraint Front End Discriminating Sensor | On underside of radiator support. |
| Inflatable Restraint Left Door Discriminating Sensor | In left door lower side panel. |
| Inflatable Restraint Right Door Discriminating Sensor | In right door lower side panel. |
| Intake Air Temperature (IAT) Sensor | Part of mass airflow sensor. |
| Knock Sensor (KS) (4.3L VIN W) | On rear of engine block. (Схема №1) |
| Knock Sensors (KS) (4.8L VIN V) | In the valley under the intake manifold. (Схема №6) |
| Knock Sensors (KS) (5.3L VIN T) | In the valley under the intake manifold. (Схема №6) |
| Knock Sensors (KS) (6.0L VIN U) | In the valley under the intake manifold. (Схема №6) |
| Manifold Absolute Pressure (MAP) Sensor (4.3L VIN W) | On top right of engine, near fuel injectors. (Схема №4) |
| Manifold Absolute Pressure (MAP) Sensor (4.8L VIN V) | On top rear of engine, on intake manifold. (Схема №5) |
| Manifold Absolute Pressure (MAP) Sensor (5.3L VIN T) | On top rear of engine, on intake manifold. (Схема №5) |
| Manifold Absolute Pressure (MAP) Sensor (6.0L VIN U) | On top rear of engine, on intake manifold. (Схема №5) |
| Mass Airflow (MAF) Sensor | In air intake duct. |
| Passlock Sensor | Part of the ignition cylinder. |
| Rear Propshaft Speed Sensor | In transfer case extension housing. |
| Remote Control Door Lock Sensor | Top center of dash, near instrument cluster. |
| Steering Hand Wheel Speed/Position Sensor | Near base of steering column. |
| Throttle Position Sensor (Dual Track) | Near front of engine compartment. |
| Throttle Position (TP) Sensor (4.3L VIN W) | On throttle body assembly. (Схема №1) |
| Throttle Position (TP) Sensor (4.8L VIN V) | On throttle body assembly. (Схема №5) |
| Throttle Position (TP) Sensor (5.3L VIN T) | On throttle body assembly. (Схема №5) |
| Throttle Position (TP) Sensor (6.0L VIN U) | On throttle body assembly. (Схема №5) |
| Vehicle Speed Sensor (2WD) | On left rear side of transmission. |
| Vehicle Speed Sensor (4WD) | On left side of transfer case. |
| Wheel Speed Sensor (Front) (2) | On left & right front wheel hub assembly. |
SENDING UNITS & SENSORS
SOLENOIDS & SOLENOID VALVES
| Component | Component Location |
|---|---|
| Brake Transmission Shift Interlock Solenoid | On lower part of steering column. |
| Electronic Variable Orifice (EVO) Solenoid | On power steering pump fluid fittings. |
| Evaporative Emissions (EVAP) Canister Purge Valve (4.3L VIN W) | On top right rear of engine. (Схема №1) |
| Evaporative Emissions (EVAP) Canister Purge Valve (4.8L VIN V) | On top right rear of engine. (Схема №5) |
| Evaporative Emissions (EVAP) Canister Purge Valve (5.3L VIN T) | On top right rear of engine. (Схема №5) |
| Evaporative Emissions (EVAP) Canister Purge Valve (6.0L VIN U) | On top right rear of engine. (Схема №5) |
| Evaporative Emissions (EVAP) Canister Vent Valve | On right front side of fuel tank. |
| Exhaust Gas Recirculation (EGR) Valve (4.3L VIN W) | On top front of engine, near thermostat housing. (Схема №4) |
| Exhaust Gas Recirculation (EGR) Valve (4.8L VIN V) | On top right front of engine. |
| Exhaust Gas Recirculation (EGR) Valve (5.3L VIN T) | On top right front of engine. |
| Exhaust Gas Recirculation (EGR) Valve (6.0L VIN U) | On top right front of engine. |
| Idle Air Control (IAC) Valve (4.3L VIN W) | Attached to right rear of throttle body. (Схема №1) |
| Idle Air Control (IAC) Valve (4.8L VIN V) | Attached to top of throttle body. (Схема №5) |
| Idle Air Control (IAC) Valve (5.3L VIN T) | Attached to top of throttle body. (Схема №5) |
| Idle Air Control (IAC) Valve (6.0L VIN U) | Attached to top of throttle body. (Схема №5) |
| Secondary Air Injection Reaction Pump Shutoff Valve | On right rear of engine compartment. (Схема №8) |
| Secondary Air Injection Reaction Solenoid | On right rear of engine compartment. (Схема №8) |
| Shock Solenoid Valve (4) | Part of each respective shock absorber. |
SOLENOIDS & SOLENOID VALVES
SWITCHES
| Component | Component Location |
|---|---|
| A/C Automatic Recirculating Switch | In A/C muffler hose, close to condenser. |
| A/C Compressor High Pressure Cutout Switch | On rear of A/C compressor. |
| A/C Compressor Low Pressure Cycling Switch | On right side of accumulator. (Схема №8) |
| Back-Up Lamp Switch | On left side of transmission. |
| Brake Fluid Level Switch | On left side of brake fluid reservoir. |
| Clutch Pedal Position Switch | On top of clutch pedal bracket. |
| Engine Coolant Level Switch | In coolant reservoir. |
| Engine Oil Level Switch | On right side of oil pan. |
| Front Axle Actuator/Switch | On right side of center on axle housing. |
| Low Washer Switch | In washer fluid reservoir. |
| Oil Pressure Switch (4.3L VIN W) | On top left rear of engine, near distributor. (Схема №1) |
| Park Brake Switch | Part of the park brake assembly. |
| Park/Neutral Position Switch | On left side of transmission. |
| Seat Belt Switch | On driver's seat belt buckle. |
| Stoplight Switch | On top of brake pedal bracket. |
| Transfer Case Switch | On left front of transfer case. |
SWITCHES
MISCELLANEOUS
| Component | Component Location |
|---|---|
| Blower Motor Resistor/Relay Assembly | On HVAC module, near blower motor. |
| Data Link Connector (DLC) | Under left side of dash, below steering column. |
| Fuel Pressure Regulator (4.8L VIN V) | On left side fuel rail. (Схема №5) |
| Fuel Pressure Regulator (5.3L VIN T) | On left side fuel rail. (Схема №5) |
| Fuel Pressure Regulator (6.0L VIN U) | On left side fuel rail. (Схема №5) |
| Global Positioning Signal (GPS) Antenna | On left side of rear window. |
| Ignition Coil (4.3L VIN W) | On top right rear of engine. (Схема №1) |
| Ignition Coils (4.8L VIN V) | On top of left and right valve covers. |
| Ignition Coils (5.3L VIN T) | On top of left and right valve covers. |
| Ignition Coils (6.0L VIN U) | On top of left and right valve covers. |
| Radio Amplifier | Behind right side of dash. |
MISCELLANEOUS
CONNECTORS
| Component | Component Location |
|---|---|
| C100 (Black, 16 Pin) | Under engine wiring harness. |
| C101 | Under engine wiring harness. |
| C102 (Black, 8 Pin) | Under engine wiring harness. |
| C148 (Light Gray, 8 Pin) | On left side rocker cover. |
| C149 (Light Gray, 8 Pin) | On right side rocker cover. |
| C150 (Black, 4 Pin) | On left inner fender. |
| C151 (Black, 12 Pin) | On left inner fender. |
| C153 (Blue, 12 Pin) | On left inner fender. |
| C197 (Black, 38 Pin) | Near spare tire. |
| C200 (Light Gray, 22 Pin) | At right "A" pillar. |
| C201 (Black, 17 Pin) | On steering column. |
| C201A (Black, 17 Pin) | On steering column. |
| C201B (Black, 18 Pin) | On steering column. |
| C201C (Black, 13 Pin) | On steering column. |
| C202 (Black, 8 Pin) | On left side of dash. |
| C205 (Black, 12 Pin) | To left of dash. |
| C208 (Gray, 22 Pin) | To right of dash. |
| C210 (Black, 2 Pin) | At left "A" pillar. |
| C250 (Gray, 6 Pin) | Near radio. |
| C251 (Gray, 6 Pin) | In right side dash. |
| C253 (Gray, 10 Pin) | To left of radio. |
| C296 (Black, 8 Pin) | Behind glove compartment box. |
| C297 | On lower right side of dash. |
| C297A (Brown, 6 Pin) | On lower right side of dash. |
| C297B (Cream, 6 Pin) | On lower right side of dash. |
| C297C (Gray, 6 Pin) | On lower right side of dash. |
| C298 (Black, 6 Pin) | At right kick panel. |
| C299 (Gray, 22 Pin) | At right kick panel. |
| C301 (Black, 6 Pin) | Under left seat. |
| C303 (Black, 6 Pin) | Under right seat. |
| C305 (Gray, 12 Pin) | Under left seat. |
| C312 (Blue, 8 Pin) | Inside right rear of vehicle. |
| C350 (Black, 18 Pin) | Inside right rear of vehicle. |
| C396 (Black, 10 Pin) | Near right rear door. |
| C397 (Black, 6 Pin) | Inside right rear of vehicle. |
| C398 (Black, 2 Pin) | Near left kick panel. |
| C399 (Black, 6 Pin) | Under right seat. |
| C402 (Gray, 7 Pin) | At left rear underbody. |
| C403 (Gray, 8 Pin) | At right rear underbody. |
| C404 (Medium Gray, 4 Pin) | At right rear underbody. |
| C499 (Gray, 12 Pin) | Near right liftgate hinge. |
CONNECTORS
GROUNDS
| Component | Component Location |
|---|---|
| G100 | On left radiator support bracket. |
| G102 (4.3L VIN W) | On lower right front of engine block. |
| G102 (4.8L VIN V) | On left side of engine block. (Схема №5) |
| G102 (5.3L VIN T) | On left side of engine block. (Схема №5) |
| G102 (6.0L VIN U) | On left side of engine block. (Схема №5) |
| G103 (4.3L VIN W) | On right rear of engine block. (Схема №1) |
| G103 (4.8L VIN V) | On right rear of engine block. |
| G103 (5.3L VIN T) | On right rear of engine block. |
| G103 (6.0L VIN U) | On right rear of engine block. |
| G104 (4.3L VIN W) | On left rear of engine block. (Схема №1) |
| G104 (4.8L VIN V) | On left rear of engine block. |
| G104 (5.3L VIN T) | On left rear of engine block. |
| G104 (6.0L VIN U) | On left rear of engine block. |
| G105 (4.3L VIN W) | On lower right front of engine block. |
| G105 (4.8L VIN V) | On left front of engine block. |
| G105 (5.3L VIN T) | On left front of engine block. |
| G105 (6.0L VIN U) | On left front of engine block. |
| G106 (4.3L VIN W) | On right front of engine block. |
| G106 (4.8L VIN V) | On right rear of engine block. |
| G106 (5.3L VIN T) | On right rear of engine block. |
| G106 (6.0L VIN U) | On right rear of engine block. |
| G107 | Engine ground strap. |
| G108 | Body ground strap. |
| G110 | On left front body mount. |
| G200 | On right "A" pillar. |
| G203 | On left "A" pillar. |
| G302 | On left body mount. |
| G304 | Under driver's seat. |
| G305 | On left "B" pillar. |
| G306 | On right "B" pillar. |
| G401 | On spare tire hoist bracket. |
| G403 | On left frame rail. |
| G410 | On right rear inner side body panel. |
| G410A | On right rear inner side body panel. |
GROUNDS