Components
Component Location Connector4 Wheel Anti-Lock Brakes (4WABS)
Module On LH front frame rail C144, C145
4 Wheel Anti-Lock Brakes (4WABS)
Relay Behind center of Instrument Panel, (I/P) on
4 wheel anti-lock brakes relay C232
4R70W Transmission RH side of transmission C110
A/C Clutch Cycling Pressure Switch RH front of engine compartment C161
A/C Compressor Clutch (4.2L) Left front of engine C143
A/C Compressor Clutch
(4.6L,5.4L & 6.8L) Lower right front of engine C143
A/C Compressor Clutch (7.3L) Top LH front of engine C167
A/C Compressor Clutch Diode In Take Out (T/O) to A/C compressor clutch
A/C Illumination Lamp Center of I/P, on NO illumination lamp C205
A/C Pressure Cut-out Switch Right front of engine compartment C159
Anti-Lock Brake System Data
Link Connector Below LH side of I/P C242
Accelerator Pedal Position
Sensor Behind LH side I/P, above accelerator pedal C246
Air Bag Diagnostic Monitor Below RH side of I/P
on air bag diagnostic monitor C200
Air Bag Bracket Behind RH side of I/P near passenger's
airbag C210
Auxiliary A/C Illumination Middle of rear headliner,
in rear auxiliary blower switch C917
Auxiliary A/C-Heater Blower Switch
(with A/C) Center of I/P above radio C230
Auxiliary Battery RH side of vehicle on frame rail
Auxiliary Battery Relay Right front of engine compartment,
near battery
Auxiliary Blower Motor Left rear corner of vehicle, above wheel well C406
Auxiliary Blower Motor Relay Left rear corner of vehicle, above wheel well C403
Auxiliary Blower Resistor Left rear corner of vehicle, above wheel well C405
Auxiliary Heater Blower Switch
(Without A/C) Center of I/P above radio C230
Auxiliary High Blower Motor Relay Left rear corner of vehicle, above wheel well C404
Auxiliary Powertrain Control Connector Behind LH side of I/P C249
Barometric Pressure Sensor Below LH side of I/P C248
Blend Door Actuator Behind center of I/P on A/C-heater plenum C237
Blower Motor RH side of engine compartment C160
Blower Motor Relay LH front of engine compartment,
in engine compartment fuse box
Blower Motor Resistor RH rear of engine compartment,
near blower motor C158
Brake Air Pressure Regulator Valve Left side of engine compartment,
near master cylinder C153
Brake Pedal Position Switch Behind LH side of I/P on brake pedal bracket C238
Brake Pressure Switch LH side of engine compartment, bottom
of brake master cylinder C151
Button Contact Attached to rear of right "B" pillar C309
Camshaft Position Sensor (4.2L) Front center of engine C139
Camshaft Position Sensor (4.6L) Front of left cylinder head C139
Camshaft Position Sensor (5.4L) Front of left cylinder head C139
Camshaft Position Sensor (6.8L) Left front of engine C139
Camshaft Position Sensor Shield In wiring harness, between camshaft position
sensor and Powertrain Control Module (PCM)
Cargo Lamp Attached to rear headliner C900
Center Air Bag Sensor Front center of engine compartment,
behind grille C191
Cigar Lighter Center of I/P on cigar lighter C218, C257
Clockspring Assembly Top of steering column
on clockspring assembly C220, C223
Coil On Plug (COP) # 1 (5.4L & 6.8L) Right bank of engine, above # 1 cylinder C184
Coil On Plug (COP) # 2 (5.4L & 6.8L) Right bank of engine, above # 2 cylinder C183
Coil On Plug (COP) # 3 (5.4L & 6.8L) Right bank of engine, above # 3 cylinder C182
Coil On Plug (COP) # 4 (5.4L & 6.8L) Right bank of engine, above # 4 cylinder C181
Coil On Plug (COP) # 5 (5.4L & 6.8L) Left bank of engine, above # 5 cylinder C176
Coil On Plug (COP) # 6 (5.4L & 6.8L) Left bank of engine, above # 6 cylinder C177
Coil On Plug (COP) # 7 (5.4L & 6.8L) Left bank of engine, above # 7 cylinder C178
Coil On Plug (COP) # 8 (5.4L & 6.8L) Left bank of engine, above # 8 cylinder C179
Coil On Plug (COP) # 9 (6.8L) Left bank of engine, above # 9 cylinder C187
Coil On Plug (COP) # 10 (6.8L) Left bank of engine, above # 10 cylinder C185
Crankshaft Position (CKP) Sensor
(4.2L, 4.6L & 6.8L) Lower right front of engine C141
Crankshaft Position Sensor (5.4L) Lower center front of engine C141
Crankshaft Position Sensor Shield In wiring harness, between crankshaft position
sensor and PCM
Cylinder Head Temperature
Sensor (4.6L, 5.4L & 6.8L) Top front of left cylinder head C172
Data Link Connector Below LH side of I/P C241
Daytime Running Lamps Module RH front of engine, near horns C193
Delta Pressure Feedback EGR
Sensor (4.2L) Top right front of engine, on DPFE sensor C118
Delta Pressure Feedback EGR
(DPFE) Sensor (4.6L) Top left rear of engine C118
Delta Pressure Feedback EGR
(DPFE) Sensor (5.4L) Top RH side of engine C118
Delta Pressure Feedback EGR
(DPFE) Sensor (6.8L) Left rear top engine C118
Digital Transmission Range (DTR)
Sensor (4R7OW) LH side of transmission C115
Digital Transmission Range (DTR)
Sensor (E4OD) LH side of transmission C115
Dome Lamp In front headliner C9C2
Dome/Map Switch and Lamp In front headliner C903
Dome Switch/Lamp Middle of rear headliner C904
Driveline Disconnect Switch Behind LH side of I/P C262
Driver's Air Bag Top of steering column C255
Driver's Seat Belt Right side of driver's seat C341
Driver's Seat Motor Assembly Underside of driver's seat C338
Driver's Seat Regulator Control
Switch On left side of driver's seat C337
Dual Brake Warning Diode/Resistor
Assembly Main harness, near Take Out (T/O) to C225
Dual Brake Warning Switch LH side of engine compartment, bottom
of brake master cylinder C149
E4OD Transmission RH side of transmission C114
EGR Solenoid (4.2L) Above center of right valve cover C125
EGR Solenoid (4.6L) Above LH valve cover, on bracket C125
EGR Solenoid (5.4L) Above left rear of engine, on bracket C125
EGR Solenoid (6.8L) Top left rear of engine C125.
Electronic Flasher Behind LH side of I/P on electronic flasher C239
Engine Compartment Battery RH front of engine compartment
Engine Compartment Fuse Box LH front of engine compartment
Engine Coolant Temperature
Sensor(4.2L) Top front of engine, on heater outlet elbow C142
Engine Coolant Temperature (ECT)
Sender Lower left front of engine C1004
Engine Oil Pressure Switch (4.2L) Left front of engine, below A/C compressor C138
Engine Oil Pressure Switch (4.6L) Lower left front of engine C138
Engine Oil Pressure Switch (5.4L) Lower left front of engine C138
Engine Oil Pressure Switch (6.8L) Lower left front of engine C138
Engine Oil Pressure Switch (7.3L) Top right center of engine C138
Engine Oil Temperature Sensor Center LH side of engine C1007
Evaporative Emissions Canister
Purge Valve Under LH rear of vehicle C416
Exhaust Back Pressure Sensor Top center of engine C1008
Exhaust Pressure Regulator Top LH rear of engine C1C11
Forward Aft-Axle Fuel Tank Valve Under rear of vehicle, near aft-axle fuel
tank assembly C353
Front Blower Switch Center of I/P, above radio C207
Fuel Injector # 1 (4.2L, 4.6L
5.4L & 6.8L) In intake manifold C119
Fuel Injector # 1
(7.3L with electric fuel pump) Near front of RH side of right valve cover
Fuel Injector # 2 (4.2L, 4.6L
5.4L & 6.8L) In intake manifold C122
Fuel Injector # 2
(7.3L with electric fuel pump) Near front of LH side of left valve cover
Fuel Injector #3 (4.2L, 4.6L
5.4L & 6.8L) In intake manifold C123
Fuel Injector #3
(7.3L with electric fuel pump) Near front of RH side of right valve cover
Fuel Injector #4 (4.2L, 4.6L
5.4L & 6.8L) In intake manifold C136
Fuel Injector #4 (7.3L with electric
fuel pump) Near front of LH side of left valve cover
Fuel Injector #5 (4.2L, 4.6L
5.4L & 6.8L) In intake manifold C135
Fuel Injector #5
(7.3L with electric fuel pump) Near rear of RH side of right valve cover
Fuel Injector #6 (4.2L, 4.6L
5.4L & 6.8L) In intake manifold C134
Fuel Injector #6
(7.3L with electric fuel pump) Near rear of LH side of left valve cover
Fuel Injector #7 (4.6L, 5.4L & 6.8L) In intake manifold C170
Fuel Injector #7
(7.3L with electric fuel pump) Near rear of RH side of right valve cover
Fuel Injector #8 (4.6L, 5.4L & 6.8L) In intake manifold C171
Fuel Injector #8
(7.3L with electric fuel pump) Near rear of LH side of left valve cover
Fuel Injector #9 In intake manifold C186
Fuel Injector #10 In intake manifold C188
Fuel Injectors/Glow Plugs (#1, #3) Near front of RH side of right valve cover C1000
Fuel Injectors/Glow Plugs (#5, #7) Near rear of RH side of right valve cover C1001
Fuel Injectors/Glow Plugs (#2, #4) Near front of LH side of left valve cover C1002
Fuel Injectors/Glow Plugs (#6, #8) Near rear of LH side of left valve cover C1003
Fuel Line Heater Top center of engine C1018
Fuel Pump LH rear of engine compartment C111
Fuel Pump Module Below vehicle, in fuel tank C347
Fuel Pump Relay LH front of engine compartment,
in engine compartment fuse box *
Fuel Rail Cut-Off Valve Right bank of engine, on fuel rail C1014
Fuel Rail Temperature Sensor Right bank of engine, on fuel rail C1015
Fuel Tank Pressure Sensor Under LH center of vehicle C349
Fuel Tank Sender Under LH center of vehicle C352
Fuel Tank Temperature Sensor Under LH center of vehicle C351
Fuel Water Switch Top right center of engine C999
Function Selector Switch Center of I/P C204
Fuel Tank Pressure Transducer Under center rear of vehicle, near fuel tank C305
Fuse Link A At starter motor relay *
Fuse Link B At starter motor relay *
Fuse Link C At starter motor relay *
Fuse Link D At starter motor relay *
Fuse Link E At starter motor relay *
Fuse Link F At starter motor relay *
Fuse Link G At starter motor relay *
Generator/Voltage Regulator Top RH side of engine C198
Generator/Voltage Regulator Top RH side of engine C199
Generator/Voltage Regulator (Primary) Top RH side of engine C020
Generator/Voltage Regulator (Secondary) RH side of engine, below (primary)
generator/voltage regulator C198
Glow Plug # 1 (with electric fuel pump) Near front of RH side of right valve cover *
Glow Plug # 2 (with electric fuel pump) Near front of LH side of left valve cover *
Glow Plug #3 (with electric fuel pump) Near front of RH side of right valve cover *
Glow Plug #4 (with electric fuel pump) Near front of LH side of left valve cover *
Glow Plug #5 (with electric fuel pump) Near rear of RH side of right valve cover *
Glow Plug #6 (with electric fuel pump) Near rear of LH side of left valve cover *
Glow Plug #7 (with electric fuel pump) Near rear of RH side of right valve cover *
Glow Plug #8 (with electric fuel pump) Near rear of LH side of left valve cover *
Glow Plug Relay Top RH side of engine *
Heated Oxygen Sensor #11
(4.2L, 4.6L & 5.4L) Lower right rear of engine C127
Heated Oxygen Sensor #11
(6.8L) Right rear of engine C127
Heated Oxygen Sensor #12
(4.2L, 4.6L) Beneath center of vehicle,
on right side of transmission C106
Heated Oxygen Sensor #21
(4.2L & 6.8L) Left rear of engine C128
Heated Oxygen Sensor #21
(4.6L & 5.4L) Lower left rear of engine C128
Heated Oxygen Sensor #22
(4.2L, 4.6L) Beneath center of vehicle,
near left rear of transmission C107
Heated Oxygen Sensor #22
(5.4L, 6.8L) Beneath center of vehicle C105
High Mounted Stop/Cargo Lamp Top rear of vehicle C411
High Pitch Horn Lower right front of engine compartment,
behind grille C192
Horn Relay Left front of engine compartment,
in engine compartment fuse box
Horn Switch Center of steering wheel
Idle Air Control Valve (4.2L) RH side of engine, near ignition coil C129
Idle Air Control Valve (4.6L) Rear of engine, near intake C129
Idle Air Control Valve (5.4L) Top center rear of engine, near air intake C129
Idle Air Control Valve (6.8L) Top center rear of engine, near air intake C129
Idle Validation Switch Below LH side of I/P C247
Ignition Coil (4.2L) Left front of engine C130
Ignition Coil (4.6L) Left front of engine C175
Ignition Coil (4.6L) Right front of engine C169
Ignition Switch Lower RH side of steering column C240
Illuminated Entry Module Below vehicle, along LH frame rail C344
In-Transit Fuel Pump Module Behind RH kick panel C236
Inertia Fuel Shutoff Switch Behind LH side of I/P C215
Injection Control Pressure
Sensor Top of engine C1009
Injection Pressure Regulator Center top of engine C1006
Injection Pressure Sensor Right bank of engine, on fuel rail C1016
Injector Driver Module Left front side of engine compartment C1157
Inlet Air Control Sensor (4.6L) LH front of engine C173
Inlet Air Control Sensor (5.4L) LH front of engine C173
Instrument Cluster Behind LH side of I/P C224
Instrument Cluster Behind LH side of I/P C225
Instrument Cluster Behind LH side of I/P C226
Instrumentation Engine Coolant
Temperature Sensor (4.2L) RH rear of engine, near fuel injector #6 C137
Instrumentation Engine Coolant
Temperature Sensor (4.6L) Top front center of engine C137
Instrumentation Engine Coolant
Temperature Sensor (5.4L) Top LH side of engine,
on lower intake manifold C137
Instrumentation Engine Coolant
Temperature Sensor (6.8L) Upper left front of engine C137
Instrumentation Engine Coolant
Temperature Sensor (7.3L) Upper left front of engine C137
Intake Air Temperature Sensor Center of engine compartment, part of
clean air tube C156
Intake Manifold Runner Position
Sensor #1 Left rear of intake C133
Intake Manifold Runner Position
Sensor #2 Right rear of intake C132
Intake Manifold Runner Control Right rear top of engine C124
I/P Fuse Panel Below left side of I/P, near left kick panel
Key Warning Switch In steering column, near keyhole
Knock Sensor (4.2L) Right rear side of engine C140
Knock Sensor (4.6L) Top right rear side of engine C140
Knock Sensor (5.4L) Top right rear of engine C140
Knock Sensor (6.8L) Top right rear side of engine C140
Knock Sensor Shield In wiring harness, between knock sensor
and PCM
Left Front Door Lock Motor Rear of left front door C501
Left Front Door Speaker Top right corner of LH door C504
Left Front Park/Turn Lamp LH front of vehicle C190
Left Front Wheel Sensor Behind LH front wheel C1O2
Left Power Mirror Front of left front door C507
Left Stop/Park/Turn Lamp LH rear of vehicle C41O
LH Aero Headlamp LH front of vehicle C189
LH Backup Lamp LH rear of vehicle C409
LH Courtesy Lamp Switch Mounted in LH door jamb C328
LH Door Handle Switch Top left corner of LH door C506
LH Headlamp LH front of vehicle C196
LH Mid Speaker Behind LH "B" pillar C332
LH Power Window Motor Lower center of left front door C502
LH Rear Speaker Mounted on LH rear door panel C413
LH Visor Lamp LH side of front headliner C921
License Lamp In right rear door C408
Low Pitch Horn Lower right front of engine compartment,
behind grille C192
Low Vacuum Warning Switch Left front of engine compartment C164
Main Light Switch LH side of I/P C227
Manifold Absolute Pressure
Sensor Right side of engine compartment C1155
Mass Air Flow Sensor Center of engine compartment C155
Master Window/Door Lock Control
Switch Mounted on LH door panel C500
Memory Lock Module Behind LH "B" pillar C330
Midship Fuel Tank Valve Under LH center of vehicle, near
midship fuel tank C348
Modified Vehicle Power Left rear corner of engine compartment C148
Modified Vehicle Power Behind LH side of I/P C233
Modified Vehicle Power At base of LH "B" pillar C331
Multi-function Switch Top side of steering column C250
Multi-function Switch Top side of steering column C251
Natural Gas Vehicle Module LH side inner fender of engine compartment C1012
Natural Gas Vehicle Timer LH rear of engine compartment near PCM C101
Output Shaft Speed Sensor Under vehicle, on left side of transmission C109
Overdrive Cancel Switch RH side of steering column C222
Parking Brake Switch Near LH kick panel C243
Passenger's Air Bag Behind RH side of I/P C209
Passenger's Seat Belt On left side of front passenger seat C342
Powertrain Control Module Power Relay LH front of engine compartment,
in engine compartment fuse box
Plugged Fuel Filter Vacuum Switch Top RH side of engine C1997
Power Mirror Switch (without Door Trim) Center of driver's door C508
Power Mirror Switch (with Door Trim) Center of driver's door C505
Power Plug Behind center I/P,near cigar lighter C219
Powertrain Control Module
(4.2L, 4.6L, 5.4L, 5.4L NGV
Rear Anti-Lock Brake System
Diagnostic Connector Below RH side of I/P C208
Radio Center of I/P C212, C213
Radio Center of I/P C231
Radio Capacitor # 1 (4.2L) Top side of engine, attached to ignition coil C131
Radio Capacitor # 1 (4.6L) Right front of engine, attached to ignition coil C131
Radio Capacitor # 2 (4.6L) LH side of engine, attached to ignition coil C174
Radio Capacitor # 1 (5.4L) Upper left rear of engine C131
Radio Capacitor # 2 (5.4L) Right rear of engine C174
Radio Capacitor # 1 (6.8L) Upper left rear of engine C131
Radio Capacitor # 2 (6.8L) Upper RH rear of engine C174
Rear Aft-Axle Fuel Tank Valve Under rear of vehicle, near aft-axle
fuel tank assembly C354
Rear Anti-Lock Brake System
Module Behind center side of I/P C217
Rear Auxiliary Blower Switch Middle of rear headliner C916
Rear Axle Speed Sensor Below rear of vehicle, mounted on
differential C415
Rear Courtesy Lamp Switch In RH rear door jamb C414
Rear Dome/Map Switch and Lamp In rear of rear headliner C901
Rear Door Lock Motor Left center of right rear door C423
Rear Power Door Lock Switch Left center of right rear door C425
Remote Keyless Entry Module Behind LH "B" pillar C335, C336
RH Aero Headlamp RH front of vehicle C195
RH Backup Lamp RH rear of vehicle C400
RH Courtesy Lamp Switch In RH door jamb C327
RH Door Handle Switch Top rear of right front door C605
RH Headlamp RH front of vehicle C197
RH Power Door Lock/Window Switch Center of right front door C600
RH Power Window Motor Lower center of right front door C601
RH Rear Speaker Mounted in RH rear door C421
RH Side Door Speaker Front center of side door C311
RH Visor Lamp RH side of front headliner C922
Right Front Door Lock Motor Top rear of right front door C602
Right Front Door Speaker In front center of right front door C604
Right Front Park/Turn Lamp RH front of vehicle C194
Right Front Wheel Sensor Near right front wheel C103
Right Power Mirror Front of right front door C606
Right Stop/Park/Turn Lamp RH rear of vehicle C401
Remote Keyless Entry Data Link
Connector Behind LH side of I/P C245
Shift Lock Actuator Below RH side of steering column C221
Side Door Courtesy Lamp Switch Behind RH "B" pillar in door jamb C308
Side Door Courtesy Lamp Switch Behind RH "B" pillar in door jamb C312
Side Door Lock Motor Mounted in side door C315
Speed Control Servo/Amplifier
Assembly LH side of engine compartment, near
brake master cylinder C146
Speed Control Switch Assembly Top of steering column C253
Starter Motor Lower RH side of engine
Starter Motor Relay RH front corner of engine compartment,
near battery *
Temperature Control Switch Center of I/P C206
Throttle Position (TP) Sensor
(4.2L, 4.6L, 5.4L & 6.8L) Top of engine, near air intake C117
Trailer Backup Lamp Relay LH front of engine compartment,
in engine compartment fuse box *
Trailer Battery Charge Relay LH front of engine compartment,
in engine compartment fuse box *
Trailer Running Lamp Relay LH front of engine compartment,
in engine compartment fuse box *
Trailer/Camper Adapter (Class I) Below LH side of rear bumper C422
Trailer/Camper Adapter (Class II) Below LH side of rear bumper C419
Turbine Shaft Speed (TSS) Sensor Under vehicle, on right side of transmisssion C1021
Vacuum Check Valve NA *
Vapor Management Valve
(4.2L, 4.6L, 5.4L & 6.8L) Center rear of engine compartment C126
Vehicle Speed Sensor (VSS) Under vehicle, on left side of transmission C108
Warning Buzzer Module Behind center of I/P C214
Washer Pump Attached to washer fluid reservoir
on RH fender apron C157
Water In Fuel Sensor Top left center of engine C1998
Windshield Wiper Motor LH rear of engine compartment, mounted
on top of cowl C147
Wiper Control Module Behind center side of I/P C216