Harness Routing Views. Chevrolet Silverado

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2008 🢒 Silverado - 2WD 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 Harness Routing Views

Figure 1:

Forward Lamp Harness Routing (Gas except LY6)


(1)	G101
(2)	Left Front Fender
(3)	Left Front Headlamp
(4)	G100
(5)	Radiator
(6)	X106
(7)	J101
(8)	J100
(9)	X103
(10)	X100
(11)	Fuse Block - Underhood X1

Figure 2:

Forward Lamp Harness Routing (Diesel/LY6)


(1)	J101
(2)	X106
(3)	X103
(4)	J100
(5)	X100
(6)	G100
(7)	G101

Figure 3:

Engine Harness Routing - Left Side (4.3L)


(1)	Throttle Body
(2)	G107
(3)	Transmission
(4)	X300
(5)	X109
(6)	X110 (NQG/NQH/NP2)
(7)	Fuse Block - Underhood X2

Figure 4:

Engine Harness Routing - Top (4.3L)


(1)	Mega Fuse Ring Terminal
(2)	X175 (M30)
(3)	J128
(4)	J105
(5)	J106
(6)	J130 (M30 with NQG/NQH/NP2)
(7)	Engine Control Module (ECM) X1
(8)	Engine Control Module (ECM) X2
(9)	G103
(10)	X112
(11)	Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Connector

Figure 5:

Camshaft Position Sensor Jumper Harness Routing (4.8L/5.3L/6.0L/6.2L)


(1)	X112
(2)	Camshaft Position Sensor Jumper Harness

Figure 6:

Engine Harness Routing - Left Front Side (4.8L/5.3L/6.0L/6.2L)


(1)	Air Intake Duct
(2)	X111
(3)	Fuse Block - Underhood X2
(4)	X109
(5)	X110 (NQF/NQG/NQH/NP2)
(6)	Engine Control Module (ECM) X2
(7)	Engine Control Module (ECM) X1
(8)	G102
(9)	J105

Figure 7:

Engine harness Routing - Right Front Side (4.8L/5.3L/6.0L/6.2L)


(1)	Dash Panel
(2)	X113
(3)	J106
(4)	G103

Figure 8:

Engine Harness Routing - Rear (4.8L/5.3L/6.0L/6.2L)


(1)	Dash Panel
(2)	Transmission
(3)	X175 (M30/M70)
(4)	Transfer Case Shift Control Switch (NQG/NP2)

Figure 9:

Heated Oxygen Sensor (HO2S) Jumper Harness Routing (LY6)


(1)	X125
(2)	Heated Oxygen Sensor (H02S) Bank 2 Sensor 2

Figure 10:

Engine Chassis Harness Routing - Top Front (Diesel)


(1)	Battery - Right
(2)	Fuse Holder
(3)	X127
(4)	X108
(5)	X107
(6)	X123 (PTO)
(7)	Fuse Block - Underhood
(8)	X109
(9)	Battery - Left
(10)	Engine Control Module (ECM)
(11)	Transmission Control Module (TCM)

Figure 11:

Engine Chassis Harness Routing - Top Rear (Diesel)


(1)	J104
(2)	J105
(3)	J106
(4)	J132 (K76)
(5)	J133 (PTO)
(6)	X110 (NQF/NQG/NP2)

Figure 12:

Engine Chassis Harness Routing - Rear (Diesel)


(1)	X300
(2)	G300
(3)	Automatic Transmission Turbine Speed Sensor (MW7)
(4)	Automatic Transmission (MW7)
(5)	Vehicle Speed Sensor (VSS) (MW7)
(6)	X124 (PTO)
(7)	Power Take Off (PTO) Module (PTO)
(8)	X175 (MW7)

Figure 13:

Auxiliary Battery Harness Routing (TP2)


(1)	Fuse Holder
(2)	Auxiliary Battery Run Relay
(3)	Auxiliary Battery Harness
(4)	Auxilary Battery Relay
(5)	X122

Figure 14:

I/P Harness Routing - Engine Compartment


(1)	G110 (XA7)
(2)	J113 (NQH)
(3)	Fuse Block - Underhood X5
(4)	Fuse Block - Underhood X4
(5)	Left Front Fender
(6)	X103
(7)	X109
(8)	X115 (JL4) or X126 (except JL4/MEX)

Figure 15:

I/P Harness Routing - Passenger Compartment


(1)	J201
(2)	JX221
(3)	J200
(4)	G201
(5)	X201
(6)	X205
(7)	J203 (Y91)
(8)	J206 (CJ2)
(9)	Junction Block - Right I/P
(10)	X200
(11)	Floor Panel
(12)	X202
(13)	J207 (except MEX)

Figure 16:

I/P Extension Harness Routing (SLT except Y91/MEX)


(1)	JX223 (U2K/UK6/UE1)
(2)	X203 (UE1/U3U/UVB)
(3)	X204 (U42)
(4)	X212
(5)	X206 (U42)
(6)	X213 (COAX)
(7)	Vehicle Communication Interface Module (VCIM) (UE1)
(8)	X301 (UQA/D07)
(9)	Floor Panel

Figure 17:

I/P Extension Harness Routing (except SLT/Y91/MEX)


(1)	X203 (UE1/U3U/UVB)
(2)	X204 (U42)
(3)	X206 (U42)
(4)	X213 (COAX)
(5)	X212
(6)	X301 (UQA/D07)

Figure 18:

Fuse Block Jumper Harness Routing (9L4)


(1)	Fuse Block - Mobile Radio
(2)	I/P Structure - Right Side
(3)	J224
(4)	J219
(5)	J209
(6)	X219
(7)	X214
(8)	J210
(9)	J211
(10)	Blunt Cut - Mobile Radio Provision
(11)	X226
(12)	Instrument Panel

Figure 19:

Brake Clutch Harness Routing


(1)	Driver Door Frame
(2)	X205
(3)	X102 (JL1)
(4)	Accelerator Pedal Position (APP) Sensor Connector
(5)	Junction Block - Left I/P (except MEX)

Figure 20:

Steering Column Harness Routing


(1)	X201
(2)	X276 (KA9)
(3)	Heated Steering Fuse (KA9)
(4)	X277 (KA9)
(5)	X275

Figure 21:

Overhead Console Harness Routing


(1)	X304 (except MEX)
(2)	Inflatable Restraint Passenger Air Bag On/Off Indicator (AL0/C99 except MEX)
(3)	Cellular Telephone Microphone (UE1/U3U/UVB)
(4)	Roof Beacon Switch (5X7/5Y0/TRW)
(5)	Sliding Rear Window Switch (A48)
(6)	Dome/Reading Lamps - Front
(7)	J322 (TRW/UG1/A48)
(8)	J323
(9)	X313 (CF5/TRW/5X7/5Y0)
(10)	Blunt Cut - Roof Mounted Beacon Provision (TRW)
(11)	Roof Beacon Relay (TRW)

Figure 22:

Headliner Harness Routing (Regular Cab)


(1)	X304 (except MEX)
(2)	X318
(3)	J327 (except MEX)
(4)	J328
(5)	X203 (UE1/U3U/UVB))

Figure 23:

Headliner Harness Routing (Extended Cab)


(1)	X304
(2)	X318
(3)	J327
(4)	J328
(5)	X203 (UE1/U3U/UVB)

Figure 24:

Headliner Harness Routing (Crew Cab)


(1)	X304
(2)	X318
(3)	J327
(4)	J328
(5)	X208 (A48)
(6)	X203 (UE1/U3U/UVB)
(7)	X204 (U42)
(8)	I/P Trim

Figure 25:

Body Harness Routing (Regular Cab)


(1)	X200
(2)	G302
(3)	X319 (AZ3/D07 with UQ3)
(4)	JX339 (except MEX)
(5)	X305 (except MEX)
(6)	G304 (except MEX)
(7)	J304 (AG2)
(8)	J303
(9)	X303 (except MEX)
(10)	Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
(11)	X275
(12)	X202
(13)	X500 (YE9 without AN3/DL3)
(14)	X501 (YE9 without AN3/DL3)
(15)	X601 (ASF)
(16)	X600 (YE9 without AN3/DL3)

Figure 26:

Body Harness Routing (Extended Cab)


(1)	X700
(2)	G303
(3)	X303
(4)	Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
(5)	X501 (YE9 without AN3/DL3)
(6)	X275
(7)	X208 (A48)
(8)	X202
(9)	X500 (YE9 without AN3/DL3)
(10)	G301
(11)	J304
(12)	X200
(13)	X601 (ASF)
(14)	X600 (YE9 without AN3/DL3)
(15)	G302
(16)	JX339
(17)	X305
(18)	X319 (AZ3/D07 with UQ3)
(19)	X800
(20)	J302
(21)	G304
(22)	X320 (A48)
(23)	J303
(24)	X322 (UD7)
(25)	Floor Panel

Figure 27:

Body Harness Routing (Crew Cab)


(1)	X601 (ASF)
(2)	X309 (Y91)
(3)	G302
(4)	J302
(5)	JX339
(6)	G301
(7)	J304
(8)	X305
(9)	X800
(10)	G304
(11)	G307
(12)	X320 (A48)
(13)	J303
(14)	G303
(15)	X700
(16)	X303
(17)	Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
(18)	X501 (YE9 without AN3/DL3)
(19)	X502 (ASF without YE9 or with AN3)
(20)	J301 (excpet AN3/DL3)
(21)	X202
(22)	X500 (YE9 without AN3/DL3)
(23)	X208 (A48)
(24)	X600 (YE9 without AN3/DL3)

Figure 28:

Chassis Harness Routing (LY6/LMM except 31 Series)


(1)	X300
(2)	X408 (UD7)
(3)	Trailer Connector (UY7)
(4)	J411 (JL1)
(5)	G401
(6)	J331
(7)	Fuse Block - Underhood X3
(8)	X126 (except JL4)
(9)	X102 (JL1)
(10)	J300
(11)	G300

Figure 29:

Chassis Harness Routing (Except LY6/LMM)


(1)	X300
(2)	X408 (UD7)
(3)	G401
(4)	J423 (except LU3/LMG/LC9)
(5)	J331
(6)	Fuse Block - Underhood X3
(7)	X115 (JL4) or X126 (except JL4/MEX)
(8)	X102 (JL1)
(9)	J338 (except LU3/LMG)
(10)	J300
(11)	G300

Figure 30:

Chassis Harness - Front Engine Compartment (31 Series)


(1)	X102 (JL1)
(2)	Fuel Pump Relay - Secondary (LY6 without NQZ)
(3)	Fuse Block - Underhood
(4)	X126

Figure 31:

Chassis Harness (31 Series)


(1)	Trailer Brake Control Relay (JL1)
(2)	J422 (JL1)
(3)	Trailer Connector
(4)	J331 (Diesel without NQZ/LY6)
(5)	X300 (LY6)
(6)	X300 (Diesel)
(7)	J411 (JL1)
(8)	Junction Block-Rear Lamps
(9)	G401
(10)	J338 (JL1)
(11)	G300
(12)	J300 (LY6 without NQZ)

Figure 32:

Camper Harness Routing and Chassis Harness Routing - Rear


(1)	X414 (UY2/8S3)
(2)	J420 (UY2)
(3)	Camper/Trailer Harness
(4)	J415 (UY2)
(5)	Chassis Harness
(6)	J416 (UY2)
(7)	J417 (UY2)
(8)	J414 (UY2)
(9)	J421 (UY2)
(10)	J410 (UY2)
(11)	Blunt Cut - Camper Trailer Provision (UY2)
(12)	G401 (except LY6/LMM)
(13)	Trailer Connector (UY7)

Figure 33:

Driver Door Harness Routing


(1)	Door Frame
(2)	Fuse Block - I/P X4
(3)	J502 (YE9 without AN3)
(4)	X500 (YE9 without AN3/DL3)
(5)	X502 (ASF without YE9 or with AN3)

Figure 34:

Passenger Door Harness Routing


(1)	J604 (YE9 without AN3/DL3)
(2)	Junction Block - Right I/P X3
(3)	Door Frame
(4)	X601 (ASF)
(5)	X600 (YE9 without AN3/DL3)
(6)	J603 (YE9 without AN3/DL3)

Figure 35:

Left Rear Door Harness Routing (Extended Cab)


(1)	X700
(2)	Door Frame

Figure 36:

Left Rear Door Harness Routing (Crew Cab)


(1)	Door Frame
(2)	X700

Figure 37:

Right Rear Door Harness Routing (Extended Cab)


(1)	Door Frame
(2)	X800

Figure 38:

Right Rear Door Harness Routing (Crew Cab)


(1)	X800
(2)	Door Handle
(3)	Door Frame

Figure 39:

Driver Seat Harness Routing


(1)	Seat Recline Motor - Driver (AN3)
(2)	Seat Lumbar Vertical Motor Position Sensor - Driver (AN3)
(3)	Seat Lumbar Vertical Motor - Driver (AN3)
(4)	X324 (AN3)
(5)	Seat Lumbar Horizontal Motor - Driver (AN3)
(6)	Seat Lumbar Horizontal Motor Position Sensor - Driver (AN3)
(7)	Seat Recline Position Sensor - Driver (AN3)
(8)	Seat Lumbar Switch - Driver (AN3)
(9)	Seat Adjuster Switch - Driver (AG1)
(10)	Memory Seat Module (MSM) (AN3)
(11)	Inflatable Restraint Seat Position Sensor (SPS) - Driver (10 Series)
(12)	Seat Adjuster Motor Assembly - Driver (AG1)
(13)	Seat Belt Buckle - Driver

Figure 40:

Console Harness Routing (Y91/D07/UQA)


(1)	X319 (D07with UQ3)
(2)	X301
(3)	Console Bracket

Figure 41:

Passenger Seat Harness Routing


(1)	Seat Frame
(2)	X325 (AN3)
(3)	Seat Lumbar Vertical Motor - Passenger (AN3)
(4)	Seat Adjuster Switch - Passenger (AG2)
(5)	Seat Lumbar Switch - Passenger (AN3)
(6)	Seat Belt Buckle - Passenger
(7)	Inflatable Restraint Passenger Presence System (PPS) Module (AL0)
(8)	Seat Adjuster Motor Assembly - Passenger (AG2)
(9)	Inflatable Restraint Passenger Presence System (PPS) Sensor (AL0)
(10)	Seat Recline Motor - Passenger (AN3)
(11)	Seat Lumbar Horizontal Motor - Passenger (AN3)

Figure 42:

Sliding Rear Window Jumper Harness Routing (A48)


(1)	X320
(2)	Rear Window
(3)	J336 (except C49)
(4)	J335 (except C49)

Figure 43:

Left and Right Hip Lamp Harness Routing (R05)


(1)	X415
(2)	J412
(3)	J419
(4)	Right Hip Lamp Harness
(5)	Left Hip Lamp Harness
(6)	J418
(7)	J413
(8)	X416

Figure 44:

Rear Bumper Harness Routing


(1)	Rear Bumper
(2)	J403 (UD7)
(3)	J404 (UD7)
(4)	Junction Block - Rear Lamps Connector
(5)	X408 (UD7)