Chevrolet Suburban K1500 2003 - 2003 GENERAL MOTORS Avalanche, Escalade, Escalade ESV, Escalade EXT, Suburban, Tahoe, Yukon & Yukon XL

Chevrolet Suburban K1500 2003 - BUZZERS, RELAYS & TIMERS

Chevrolet Suburban K1500 2003 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
A/C COMP Relay	In underhood fuse block.
Automatic Level Control Compressor Relay	Near underhood fuse block.
Auxiliary Battery Relay	Right rear of engine compartment. See Fig. 5.
DEFOG Relay	In body relay block.
DRL Relay	In underhood fuse block.
DRIVER UNLOCK Relay	In left I/P fuse block.
Electronic Adjustable Pedals Relay	Behind lower left of dash.
FOG LP Relay	In underhood fuse block.
Fuel Pump Relay (Secondary) (W/Dual Tanks)	At left side of engine compartment, on underhood fuse block bracket.
HDLP-HI Relay	In underhood fuse block.
HDLP-LOW Relay	In underhood fuse block.
HORN Relay	In underhood fuse block.
IGN 1 Relay	In underhood fuse block.
LOCK Relay	In left I/P fuse block.
PARK LP Relay	In underhood fuse block.
PRIME F/PMP Relay	In underhood fuse block.
Roof Beacon Relay	At lower left "B" pillar.
RR FOG LP Relay	In left I/P fuse block.
STARTER Relay	In underhood fuse block.
Sun Roof Relay	At lower side of right "A" pillar.
UNLOCK Relay	In left I/P fuse block.
W/S WASH Relay	In underhood fuse block.

Chevrolet Suburban K1500 2003 - CIRCUIT PROTECTION DEVICES

Chevrolet Suburban K1500 2003 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Body Relay Block	Under left side of dash, near kick panel.
I/P Fuse Block	Behind lower left side of dash.
Rear Lamps Junction Block	On rear inner side of right frame rail.
Right I/P Fuse Block	On lower right side of dash.
Underhood Fuse Block	At left side of engine compartment, near battery.

Chevrolet Suburban K1500 2003 - CONTROL UNITS

Chevrolet Suburban K1500 2003 CONTROL UNITS LOCATION

Component	Location
Blower Motor Control Processor	Behind right side of dash.
Blower Motor Control Processor (Auxiliary)	Behind right rear quarterpanel, below auxiliary blower motor.
Body Control Module	On lower left side of dash, below steering column.
Driver Door Module	Behind left front door trim panel, near handle.
Electronic Brake Control Module	On left side of inner frame.
Electronic Suspension Control Module	Behind right "C" pillar trim panel.
FM Impedance Matching Module	In right rear quarter glass.
Front Passenger Door Module	Behind right front door trim, near handle.
Heated Seat Module (Left Rear)	Under left rear seat.
Heated Seat Module (Right Rear)	Under right rear seat.
HVAC Control Module	Behind center of dash.
HVAC Control Module (Auxiliary)	Mounted to top of auxiliary HVAC assembly.
Inflatable Restraint Sensing & Diagnostic Module	Under left front seat.
Memory Seat Module	Underside of left front seat.
Powertrain Control Module (PCM)	At left front side of engine compartment. See Fig. 6.
Radio Antenna Module	Above right rear quarter glass, in headliner.
Rear Object Sensor Control Module	Under 2nd row seat.
Rear Wheel Steering Control Module	Below vehicle, between spare tire & rear bumper.
Rear Window Wiper Module	In liftgate, below rear glass.
Sun Roof Module	Above front of headliner.
Throttle Actuator Control Module	At left rear side of engine compartment, near underhood fuse block. See Fig. 7.
Transfer Case Shift Control Module	Left side of I/P area, behind knee bolster, above parking brake assembly.
Vehicle Communication Interface Module	Behind right side of dash.
Windshield Wiper Motor Module	Under cowl, near wiper arms.

Chevrolet Suburban K1500 2003 - MOTORS

Chevrolet Suburban K1500 2003 MOTORS LOCATION

Component	Location
Air Temperature Actuator (Auxiliary)	Near top center of rear HVAC module assembly.
Air Temperature Actuator (Left)	Behind dash, at bottom of HVAC module.
Air Temperature Actuator (Right)	Behind dash, at top of HVAC module.
Auxiliary Temperature Actuator	Mounted to auxiliary HVAC box, near blower motor.
Blower Motor	Under right side of dash.
Blower Motor (Auxiliary)	Behind right rear quarterpanel.
Door Lock Actuator (Cargo/Liftgate)	Part of cargo/liftgate latch assembly.
Front Axle Actuator	On right center of front axle housing.
Fuel Pump & Sender Assembly (Primary)	In primary fuel tank.
Fuel Pump & Sender Assembly (Secondary) (W/Dual Tanks)	In secondary fuel tank.
Mode Actuator	On left side of HVAC module.
Mode Actuator (Auxiliary)	Behind right rear quarter trim panel, at front of auxiliary HVAC module.
Recirculation Actuator	At upper right of HVAC module.
Sun Roof Motor	Part of sun roof module.
Windshield Washer Fluid Pump	In washer fluid reservoir.

Chevrolet Suburban K1500 2003 - SENDING UNITS & SENSORS

Chevrolet Suburban K1500 2003 SENDING UNITS & SENSORS LOCATION

Component	Location
Accelerator Pedal Position Sensor	Behind accelerator pedal.
A/C Refrigerant Pressure Sensor	In high side pressure line, near compressor.
Air Temperature Sensor Assembly (Inside)	In headliner, above driver.
Air Temperature Sensor (Lower Auxiliary)	Behind right "C" pillar, at front of HVAC.
Air Temperature Sensor (Lower Left)	Behind dash, at left end of HVAC module.
Air Temperature Sensor (Lower Right)	Behind dash, at bottom of HVAC module.
Air Temperature Sensor (Outside)	Mounted to radiator core support.
Air Temperature Sensor (Upper Auxiliary)	In rear auxiliary HVAC upper duct, near "C" pillar.
Air Temperature Sensor (Upper Left)	At center of dash, below dash trim panel.
Air Temperature Sensor (Upper Right)	At center of dash, below dash trim panel.
Ambient Air Temperature Sensor	In right front bumper filler assembly.
Ambient Light Sensor	On top center of dash.
Automatic Transmission Fluid Temperature Sensor	In automatic transmission.
Automatic Transmission Input Shaft Speed Sensor	In automatic transmission.
Camshaft Position Sensor (Except 8.1L)	On top center rear of engine.
Camshaft Position Sensor (8.1L VIN G)	On left side of timing cover.
Crankshaft Position (CKP) Sensor (4.8L VIN V)	On lower right rear of engine block. See Fig. 3.
Crankshaft Position (CKP) Sensor (5.3L VIN T)	On lower right rear of engine block. See Fig. 3.
Crankshaft Position (CKP) Sensor (6.0L VIN U)	On lower right rear of engine block. See Fig. 3.
Crankshaft Position (CKP) Sensor (8.1L VIN G)	On top left rear of engine block, near bellhousing. See Fig. 4.
Engine Coolant Temperature (ECT) Sensor (4.8L VIN V)	On front side of left cylinder head. See Fig. 1.
Engine Coolant Temperature (ECT) Sensor (5.3L VIN T)	On front side of left cylinder head. See Fig. 1.
Engine Coolant Temperature (ECT) Sensor (6.0L VIN U)	On front side of left cylinder head. See Fig. 1.
Engine Coolant Temperature (ECT) Sensor (8.1L VIN G)	At middle of right cylinder head.
Engine Oil Pressure (EOP) Sensor (4.8L VIN V)	On top rear of engine.
Engine Oil Pressure (EOP) Sensor (5.3L VIN T)	On top rear of engine.
Engine Oil Pressure (EOP) Sensor (6.0L VIN U)	On top rear of engine.
Engine Oil Pressure (EOP) Sensor (8.1L VIN G)	On top rear of engine. See Fig. 4.
Fuel Composition Sensor (Except 8.1L)	Inside left frame rail, forward of electronic brake control module.
Fuel Level Sensor (Primary)	In primary fuel tank.
Fuel Level Sensor (Secondary)	In secondary fuel tank.
Fuel Pump & Sender Assembly (Primary)	In primary fuel tank.
Fuel Pump & Sender Assembly (Secondary) (W/Dual Tanks)	In secondary fuel tank.
Fuel Tank Pressure Sensor	On fuel tank, integral to fuel pump & sender assembly.
Heated Oxygen Sensor Bank No. 1 Sensor No. 1	In left exhaust pipe, before catalytic converter.
Heated Oxygen Sensor Bank No. 1 Sensor No. 2	In left exhaust pipe, after catalytic converter.
Heated Oxygen Sensor Bank No. 2 Sensor No. 1	In right exhaust pipe, before catalytic converter.
Heated Oxygen Sensor Bank No. 2 Sensor No. 2	In right exhaust pipe, after catalytic converter.
Inflatable Restraint Electronic Front End Sensor (Left)	On left front of vehicle, by core support.
Inflatable Restraint Electronic Front End Sensor (Right)	On right front of vehicle, by core support.
Inflatable Restraint Side Impact Sensor (Left)	Mounted inside driver door, behind trim panel.
Inflatable Restraint Side Impact Sensor (Right)	Mounted inside passenger door, behind trim panel.
Inside Auxiliary Air Temperature Sensor Assembly	In headliner, near left "C" pillar.
Intake Air Temperature (IAT)/Mass Airflow (MAF) Sensor	In air induction tube. See Fig. 5.
Knock Sensors (KS) (4.8L VIN V)	In valley, under intake manifold. See Fig. 2.
Knock Sensors (KS) (5.3L VIN T)	In valley, under intake manifold. See Fig. 2.
Knock Sensors (KS) (6.0L VIN U)	In valley, under intake manifold. See Fig. 2.
Knock Sensor Bank No.1 (8.1L VIN G)	On left side of engine, forward of oil filter.
Knock Sensor Bank No. 2 (8.1L VIN G)	On right side of engine, forward of starter.
Manifold Absolute Pressure (MAP) Sensor (4.8L VIN V)	On top rear of engine, on intake manifold. See Fig. 1.
Manifold Absolute Pressure (MAP) Sensor (5.3L VIN T)	On top rear of engine, on intake manifold. See Fig. 1.
Manifold Absolute Pressure (MAP) Sensor (6.0L VIN U)	On top rear of engine, on intake manifold. See Fig. 1.
Manifold Absolute Pressure (MAP) Sensor (8.1L VIN G)	On top rear of engine, on intake manifold.
Object Sensor (Left Rear Corner)	On left side of rear bumper.
Object Sensor (Left Rear Middle)	On left middle of rear bumper.
Object Sensor (Right Rear Corner)	On right side of rear bumper.
Object Sensor (Right Rear Middle)	On right middle of rear bumper.
Propshaft Speed Sensor (Front)	On left front side of transfer case.
Propshaft Speed Sensor (Rear)	On transfer case extension housing.
Steering Wheel Speed/Position Sensor	Near base of steering column.
Sunload Sensor	On center of dash, near defrost deflectors.
Suspension Position Sensor (Left Front)	On control arm, behind left front shock.
Suspension Position Sensor (Left Rear)	Behind left rear shock, near frame rail.
Suspension Position Sensor (Right Front)	On control arm, behind right front shock.
Suspension Position Sensor (Right Rear)	Behind right rear shock, near frame rail.
Vehicle Speed Sensor	On rear of transmission.
Washer Fluid Level Sensor	In washer fluid reservoir.
Wheel Speed Sensors (4)	On respective wheel hub assembly.
Yaw & Lateral Acceleration Sensor	Under right front seat.

Chevrolet Suburban K1500 2003 - SOLENOIDS & SOLENOID VALVES

Chevrolet Suburban K1500 2003 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
Evaporative Emissions (EVAP) Canister Purge Solenoid (4.8L VIN V)	Behind throttle body, near front of engine. See Fig. 1.
Evaporative Emissions (EVAP) Canister Purge Solenoid (5.3L VIN T)	Behind throttle body, near front of engine. See Fig. 1.
Evaporative Emissions (EVAP) Canister Purge Solenoid (6.0L VIN U)	Behind throttle body, near front of engine. See Fig. 1.
Evaporative Emissions (EVAP) Canister Purge Solenoid (8.1L VIN G)	To left of throttle body, near front of engine.
Evaporative Emissions Canister Vent Solenoid	On right front side of fuel tank.
Exhaust Gas Recirculation (EGR) Valve (8.1L VIN G)	On top rear center of engine. See Fig. 4.
Pressure Control Solenoid Valve	In automatic transmission.
Shock Absorber Solenoid (Left Front)	Part of left front shock.
Shock Absorber Solenoid (Left Rear)	Part of left rear shock.
Shock Absorber Solenoid (Right Front)	Part of right front shock.
Shock Absorber Solenoid (Right Rear)	Part of right rear shock.
Torque Converter Clutch Pulse Width Modulation Solenoid Valve	In automatic transmission.
Torque Converter Clutch Solenoid Valve	In automatic transmission.

Chevrolet Suburban K1500 2003 - SWITCHES

Chevrolet Suburban K1500 2003 SWITCHES LOCATION

Component	Location
A/C Low Pressure Switch	On right side of accumulator. See Fig. 5.
Automatic Transmission Fluid Pressure Manual Valve Position Switch	In automatic transmission.
Brake Fluid Level Switch	On left side of brake fluid reservoir.
Brake Pressure Differential Switch	Mounted to power brake booster, below master cylinder.
Coolant Level Switch	In coolant reservoir.
Engine Oil Level Switch	On lower right side of oil pan.
Park Brake Switch	Part of park brake assembly.
Park/Neutral Position Switch	On left side of transmission.
Stoplamp Switch	On top of brake pedal bracket.

Chevrolet Suburban K1500 2003 - MISCELLANEOUS

Chevrolet Suburban K1500 2003 MISCELLANEOUS LOCATION

Component	Location
Audio Amplifier	Under center console.
Blower Motor Resistor Assembly (Auxiliary)	Mounted to auxiliary HVAC box, below blower motor.
Data Link Connector	Under left side of dash, below steering column.
Ignition Coils	On top of left & right valve covers.

Chevrolet Suburban K1500 2003 - CONNECTORS

Chevrolet Suburban K1500 2003 CONNECTORS LOCATION

Component	Location
C100 (Black, 16 Pin)	Below underhood fuse block.
C102 (Black, 10 Pin)	Near underhood fuse block.
C104 (Black, 12 Pin)	At front side of underhood fuse block.
C114 (Black, 10 Pin)	At front side of underhood fuse block.
C115 (Black, 24 Pin)	Behind underhood fuse block.
C125 (Light Gray, 8 Pin)	On radiator support.
C127 (Light Gray, 8 Pin)	On radiator support.
C148 (Light Gray, 8 Pin)	On top left side of engine.
C149 (Light Gray, 8 Pin)	On top right side of engine.
C150 (Black, 4 Pin)	On left inner fender.
C151 (Black, 12 Pin)	Behind underhood fuse block.
C152 (Natural, 12 Pin)	Below underhood fuse block.
C153 (Black, 3 Pin)	Attached to underhood fuse block mounting bracket.
C154 (Black, 3 Pin)	Near underhood fuse block.
C155 (Black, 10 Pin)	Near left top front of engine.
C198 (Black, 1 Pin)	Near underhood fuse block.
C201 (Black, 32 Pin)	On steering column.
C202 (Black, 18 Pin)	Behind top of dash.
C203 (Black, 3 Pin)	Near left I/P fuse block.
C206 (Light Gray, 22 Pin)	Behind left kick panel.
C209 (Black, 16 Pin)	Behind left kick panel.
C210 (Black, 2 Pin)	Brake/clutch jumper harness to SEO jumper harness.
C214 (Black, 16 Pin)	Behind upper left side of dash.
C220 (Black, 24 Pin)	Behind center of dash.
C221 (Yellow, 4 Pin)	Behind left kick panel.
C222 (Yellow, 4 Pin)	Behind right kick panel.
C249 (Black, 4 Pin)	Behind center of dash.
C250 (Gray, 6 Pin)	Behind left side of dash.
C305 (Black, 16 Pin)	Under left front seat.
C306 (Black, 40 Pin)	Under front floor console.
C310 (Natural, 17 Pin)	Behind left "B" pillar trim panel.
C312 (Blue, 8 Pin)	In right rear of vehicle.
C313 (Black, 3 Pin)	Behind left kick panel.
C315 (Black, 3 Pin)	Behind left kick panel.
C320 (Gray, 13 Pin)	Under left front seat.
C321 (Light Blue, 24 Pin)	Under left front seat.
C322 (Natural, 10 Pin)	Under left front seat.
C323 (Black, 6 Pin)	Under left front seat.
C324 (Black, 8 Pin)	Under left front seat.
C325 (Gray, 6 Pin)	Under left front seat.
C326 (Gray, 6 Pin)	Under right front seat.
C329 (Black, 4 Pin)	Under right front seat.
C350 (Black, 2 Pin)	At top of transfer case.
C370 (Black, 14 Pin)	Below center console.
C388 (Black, 6 Pin)	Under right front seat.
C390 (Black, 4 Pin)	Body harness to center sail harness.
C396 (Natural, 17 Pin)	Behind right "B" pillar trim panel.
C397 (Black, 6 Pin)	Behind right rear quarterpanel.
C399 (Black, 16 Pin)	Under right front seat.
C402 (Gray, 7 Pin)	Near left rear frame rail.
C410 (Black, 2 Pin)	At right rear of vehicle.
C411 (Black, 2 Pin)	At left rear of vehicle.
C450 (Black, 38 Pin)	At right rear of vehicle.
C499 (Gray, 12 Pin)	Behind right quarterpanel, near "D" pillar.
C900 (Black, 3 Pin)	In rear liftgate.
C901 (Black, 8 Pin)	In rear liftgate.

Chevrolet Suburban K1500 2003 - GROUNDS

Chevrolet Suburban K1500 2003 GROUNDS LOCATION

Component	Location
G100	On left front body mount.
G102 (4.8L VIN V)	On left side of engine block. See Fig. 1.
G102 (5.3L VIN T)	On left side of engine block. See Fig. 1.
G102 (6.0L VIN U)	On left side of engine block. See Fig. 1.
G102 (8.1L VIN G)	On left side of engine block.
G103	On right rear of engine block.
G104	On left rear of engine block.
G105	On lower left front of engine block.
G106	On right front of engine block.
G107	Engine ground strap.
G110	On left front body mount.
G200	Near right "A" pillar.
G203	Near left "A" pillar.
G302	On left rear body mount.
G304	Under right front seat.
G305	On left "B" pillar.
G306	On right "B" pillar.
G401	On left rear body mount.
G402	Near rear bumper.
G403	On left rear body mount.
G410	Behind right rear quarterpanel.

Chevrolet Suburban K1500 2003 - SPLICES

Chevrolet Suburban K1500 2003 SPLICES LOCATION

Component	Location
SP205	Behind left I/P fuse block.
SP206	On left "B" pillar.
SP207	Behind left kick panel.
SP410A	Behind right rear quarterpanel.
SP410B	Behind right rear quarterpanel.
S100	In forward lamp harness.
S101	In forward lamp harness.
S102	In engine harness.
S103	In engine harness.
S104	In engine harness.
S107	In forward lamp harness.
S110	In engine harness.
S112	In chassis harness.
S150	In chassis harness.
S151	In left engine ignition coil jumper harness.
S152	In left engine ignition coil jumper harness.
S153	In right engine ignition coil jumper harness.
S154	In right engine ignition coil jumper harness.
S156	In engine harness.
S157	In right engine ignition coil jumper harness.
S159	In left engine ignition coil jumper harness.
S160	In right engine ignition coil jumper harness.
S200	In roof marker harness.
S201	In roof marker harness.
S202	In I/P harness.
S205	In I/P harness.
S207	In headliner harness.
S208	In roof marker harness.
S210	In I/P harness.
S211	In I/P harness.
S212	In I/P harness.
S213	In I/P harness.
S214	In I/P harness.
S216	In steering column harness.
S217	In steering column harness.
S218	In I/P harness.
S240	In steering column harness.
S241	In steering column harness.
S303	In console harness.
S307	In console harness.
S308	In body harness.
S309	In driver seat jumper harness.
S310	In driver seat jumper harness.
S311	In driver seat harness.
S312	In chassis harness.
S313	In chassis harness.
S314	In driver seat jumper harness.
S315	In driver seat jumper harness.
S319	In body harness.
S321	In headliner harness.
S322	In left rear heated seat harness.
S333	In console harness.
S335	In I/P harness.
S340	In roof marker harness.
S351	In headliner harness.
S389	In right rear heated seat harness.
S408	In left rear taillamp harness.
S412	In left rear taillamp harness.
S413	In right rear taillamp harness.
S423	In license lamp harness.
S424	In license lamp harness.
S480	In right rear taillamp harness.
S500	In left front door harness.
S601	In front passenger door harness.
S710	In left rear door harness.
S810	In right rear door harness.
S901	In liftgate harness.
S902	In liftgate harness.
S903	In right hip lamp harness.
S904	In right hip lamp harness.
S905	In left hip lamp harness.
S907	In license lamp harness.
S910	In liftgate harness.
S911	In liftgate harness.