GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra - 4WD 🢒 Engine 🢒 Engine Electrical 🢒 Power and Grounding Component Views
Figure 1:

Engine Harness Jumper to Engine POA Harness Diesel
Object Number: 1870628 Size: LF
(1)Battery - Right
(2)Fuse Holder - Underhood
(3)X127
(4)X108
(5)X107
(6)X123 (PTO)
(7)Fuse Block - Underhood
(8)X109
(9)Battery - Left (6A6/TP2)
(10)Engine Control Module (ECM)
(11)Transmission Control Module (TCM)
Figure 2:

Left Side of the Engine Compartment
Object Number: 1714226 Size: LF
(1)Windshield Wiper Motor
(2)Power Brake Booster (JL4)
(3)Windshield Washer Solvent Heater (XA7)
(4)Fuse Block - Underhood
(5)Engine Control Module (ECM)
(6)Transmission Control Module (TCM) (- MYC)
(7)Brake Booster Vacuum Sensor (JL4)/Brake Master Cylinder Pressure Sensor (JL1)
(8)Brake Fluid Level Switch
Figure 3:

Auxiliary Battery Harness (TP2)
Object Number: 1934393 Size: LF
(1)Fuse Holder - Underhood
(2)Run Relay
(3)Auxiliary Battery Harness
(4)Auxiliary Battery Relay
(5)X122
Figure 4:

Steering Column Components
Object Number: 1739403 Size: LF
(1)Turn Signal Multifunction Switch
(2)Ignition Lock Cylinder
(3)Tow/Haul Switch
(4)Steering Angle Sensor
(5)A/T Shift Lock Control Solenoid
(6)Theft Deterrent Control Module
(7)Ignition Switch
(8)Inflatable Restraint Steering Wheel Module Coil
Figure 5:

Overhead Console Harness
Object Number: 1890108 Size: LF
(1)X304
(2)Inflatable Restraint Passenger Air Bag ON/OFF Indicator (AL0/C99)
(3)Cellular Microphone (UE1/U3U/UVB)
(4)Roof Beacon Switch (TRW)
(5)Sliding Rear Window Switch (A48)
(6)Courtesy/Reading Lamps-Front
(7)J322
(8)J323
(9)X313 (CF5/TRW/5X7/5Y0)
(10)Roof Mounted Beacon Blunt Cuts (TRW)
(11)Roof Beacon Relay (TRW)
Figure 6:

Headliner and Overhead Console (U42/5Y0)
Object Number: 1934348 Size: LF
(1)Roof Beacon Switch (5Y0)
(2)Video Display (U42)
(3)Infared Module (U42)
(4)Emergency Vehicle Wiring Blunt Cuts (5Y0)
(5)Emergency Vehicle Roof Lamp Relay (5Y0)
Figure 7:

Below the I/P
Object Number: 1714212 Size: LF
(1)I/P Trim
(2)I/P Cluster Trim
(3)Floor Panel
(4)Junction Block - Left I/P
(5)Body Control Module (BCM)
(6)Transfer Case Shift Control Module
(7)Fuse Block - I/P
Figure 8:

Right Side of the I/P
Object Number: 1755824 Size: LF
(1)I/P Trim
(2)Junction Block - Right I/P
Figure 9:

Fuse Block Jumper Harness (9L4)
Object Number: 1890152 Size: LF
(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)Mobile Radio Blunt Cuts
(11)X226
(12)Instrument Panel
Figure 10:

Left Rear of the Chassis Frame
Object Number: 1858054 Size: LF
(1)Rear Bumper
(2)Junction Block - Rear Lamps
(3)Terminator Resistor
(4)Trailer Connector (UY7)
Figure 11:

Camper/Trailer Harness and Chassis Rear Harness
Object Number: 1890102 Size: LF
(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)Camper / Trailer Harness Blunt Cuts (UY2)
(12)G401 (except LY6/LMM)
(13)Trailer Connector (UY7)
Figure 12:

G100 and G101
Object Number: 1714196 Size: LF
(1)Radiator
(2)G100
(3)Chassis
(4)G101
Figure 13:

G102
Object Number: 1714197 Size: LF
(1)Crankshaft Pulley
(2)Exhaust Manifold
(3)G102
Figure 14:

Right Side of Engine (4.3L)
Object Number: 1887852 Size: LF
(1)Evaporative Emission (EVAP) Canister Purge Solenoid Valve
(2)Throttle Body
(3)Mass Air Flow (MAF) / Intake Air Temperature (IAT) Sensor
(4)X112
(5)G103
(6)Crankshaft Position (CKP) Sensor
(7)Knock Sensor (KS) - 2
(8)Starter
(9)Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
(10)Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
(11)Vehicle Speed Sensor (VSS)
Figure 15:

Left Side of Engine (Diesel)
Object Number: 1870630 Size: LF
(1)Fuel Injector 2
(2)Turbocharger Vane Position Sensor
(3)Fuel Injector 4
(4)Fuel Rail Pressure Sensor
(5)Fuel Injector 6
(6)Fuel Injector 8
(7)Glow Plug 8
(8)Glow Plug 6
(9)Engine Oil Pressure (EOP) Sensor
(10)Engine Oil Level Switch
(11)Glow Plug 4
(12)G106
(13)G102
(14)Glow Plug 2
Figure 16:

G103 (4.8L/5.3L/6.0L/6.2L)
Object Number: 1714198 Size: LF
(1)G103
(2)Throttle Body
(3)Engine Front Cover
Figure 17:

Right Side of Engine (Diesel)
Object Number: 1870626 Size: LF
(1)Fuel Injector 7
(2)Fuel Injector 5
(3)Fuel Injector 3
(4)Exhaust Gas Recirculation (EGR) Valve
(5)Fuel Injector 1
(6)Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor
(7)Intake Air Valve
(8)Crankshaft Position (CKP) Sensor
(9)Glow Plug 1
(10)G103
(11)G105
(12)Block Heater
(13)Glow Plug 3
(14)Glow Plug 5
(15)Water In Fuel Sensor
(16)Starter
(17)Glow Plug 7
Figure 18:

Rear of the Engine (4.3L)
Object Number: 1887857 Size: LF
(1)Central Sequential Fuel Injection (SFI) Module
(2)Manifold Absolute Pressure (MAP) Sensor
(3)G106
(4)Engine Oil Pressure (EOP) Sensor
(5)Ignition Control Module (ICM)
(6)G107
Figure 19:

G108, G110, G111, and G104
Object Number: 1979784 Size: LF
(1)G111 (XA7)
(2)G108
(3)G110 (XA7)
(4)Brake Booster Assembly
(5)Fuse Block - Underhood
(6)G104 (6A6)
Figure 20:

G200
Object Number: 1714193 Size: LF
(1)Floor Panel
(2)G200
Figure 21:

G201
Object Number: 1714231 Size: LF
(1)G201
(2)I/P Trim
(3)Left Front Fender
Figure 22:

G300
Object Number: 1714209 Size: LF
(1)Chassis
(2)G300
Figure 23:

G301, G302, G303, and G304
Object Number: 1796173 Size: LF
(1)G303 (Extended Cab/Crew Cab)
(2)G302
(3)G304
(4)G301
Figure 24:

G305
Object Number: 1796163 Size: LF
(1)Fuel Tank
(2)Frame
(3)G305
Figure 25:

G307 (Crew Cab)
Object Number: 1890103 Size: LF
(1)C-Pillar
(2)G307
(3)Seats-2nd Row