GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Chevrolet C-Series Medium Duty Truck B7 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Engine Controls Component Views
Figure 1:

Left Side of Vehicle
Object Number: 418190 Size: LF
(1)Throttle Actuator Control (TAC) Module
(2)Evaporative Emission (EVAP) Cannister
(3)Fuel Pump and Sender Assembly
(4)Data Link Connector (DLC)
(5)Powertrain Control Module (PCM)
Figure 2:

Engine, Left Front View
Object Number: 746234 Size: LF
(1)Connector C127
(2)Engine Harness to the Fuel Rail Harness
(3)Ignition Coil - 7
(4)Ignition Coil Harness
(5)Connector C109
(6)Knock Sensor (KS) Bank 1
(7)Knock Sensor (KS) Connector
(8)Engine Harness to the Knock Sensor (KS)
(9)Camshaft Position (CMP) Sensor
(10)Throttle Position (TP) Sensor
(11)Throttle Body
(12)Evaporative Emission (EVAP) Canister Purge Solenoid
(13)Engine Harness
Figure 3:

Engine, Left Rear View
Object Number: 746233 Size: LF
(1)Evaporative Emission (EVAP) Canister Purge Solenoid
(2)Engine Harness Bracket
(3)Connector C409
(4)Engine Harness to Transmission (MX4/MTW)
(5)Engine Oil Pressure (EOP) Sensor Connector
(6)Engine Oil Pressure (EOP) Sensor
(7)Crankshaft Position (CKP) Sensor Connector
(8)Crankshaft Position (CKP) Sensor
(9)Ground G101
(10)Engine Harness to Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
(11)Ignition Coil - 7
(12)Engine Harness
Figure 4:

Powertrain Control Module (PCM)
Object Number: 746235 Size: LF
(1)Powertrain Control Module (PCM)
(2)PCM Connector C1
(3)PCM Connector C2
(4)Engine Harness
(5)Exterior Bulkhead
Figure 5:

Throttle Actuator Control (TAC) Module
Object Number: 419118 Size: MF
(1)Throttle Actuator Control (TAC) Module
(2)Interior Bulkhead
(3)TAC Module Bracket
Figure 6:

Air Cleaner Assembly
Object Number: 746236 Size: LF
(1)Air Cleaner
(2)Intake Air Temperature (IAT)/Mass Air Flow (MAF) Sensor Connector
(3)Engine Harness
(4)Intake Air Temperature (IAT)/Mass Air Flow (MAF) Sensor
Figure 7:

Accelerator Pedal
Object Number: 403894 Size: SH
(1)Interior Bulkhead
(2)Accelerator Pedal
Figure 8:

Fuel Pump Prime Connector
Object Number: 418191 Size: MF
(1)Dash Panel
(2)Data Link Connector (DLC)
(3)Fuel Pump Prime Connector
(4)Stoplamp Switch
Figure 9:

Relay Block #4
Object Number: 403873 Size: MF
(1)Instrument Panel
(2)Relay Block #4
Figure 10:

Engine Exhaust Manifold, Bank 1
Object Number: 403887 Size: MF
(1)Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
(2)Exhaust Pipe
(3)Engine Exhaust Manifold
Figure 11:

Engine Exhaust Manifold, Bank 2
Object Number: 746237 Size: LF
(1)Exhaust Pipe
(2)Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
(3)Catalytic Converter
(4)Engine Harness
(5)HO2S Connector
Figure 12:

Engine, Left Front View
Object Number: 397684 Size: LF
(1)Fuel Injector - 1
(2)Fuel Injector - 3
(3)Fuel Injector - 5
(4)Fuel Injector - 7
Figure 13:

Engine, Right Front View
Object Number: 746241 Size: LF
(1)Throttle Actuator Control (TAC) Motor Connector
(2)TAC Motor (part of Throttle Body)
(3)Engine Harness
(4)Ignition Coil - 2
(5)Ignition Coil - 4
(6)Engine Coolant Temperature (ECT) Sensor
(7)ECT Sensor Connector
(8)Connector C110
(9)Ignition Coil - 8
(10)Ignition Coil Harness
(11)Manifold Absolute Pressure (MAP) Sensor Connector
(12)Manifold Absolute Pressure (MAP) Sensor
Figure 14:

Engine, Right Rear View
Object Number: 746238 Size: LF
(1)Exhaust Gas Recirculation (EGR) Valve Connector (2 cavities)
(2)EGR Valve
(3)Connector C401 (2 cavities)
(4)Engine Harness
Figure 15:

Fuel Pump Harness to Frame Rail (NH9/NL9)
Object Number: 746264 Size: LF
(1)Fuel Pump Harness
(2)Left Frame Rail
(3)Fuel Tank
(4)Fuel Pump and Sender Assembly (NL9)
(5)Fuel Pump and Sender Assembly (NH9)
Figure 16:

Fuel Pump Harness to Frame Rails (NYB)
Object Number: 746243 Size: LF
(1)Fuel Pump Harness
(2)Right Frame Rail
(3)Fuel Pump and Sender Assembly
(4)Fuel Tank
(5)Left Frame Rail
Figure 17:

Engine Harness to the Right Side of the IP
Object Number: 746244 Size: LF
(1)Bulkhead
(2)I/P Harness Connector C200 (56 cavities)
(3)Engine Harness
(4)Throttle Actuator Control (TAC) Module Connector C2 (16 cavities)
(5)TAC Module Connector C1 (10 cavities)
(6)TAC Module
(7)I/P Harness
(8)Connector C210 (23 cavities)
(9)Engine Harness Connector C200 (56 cavities)
Figure 18:

Transmission Harness to Manual Transmission, Typical
Object Number: 746246 Size: LF
(1)Transmission
(1)Transmission
(1)Transmission
(2)Battery Cable
(2)Battery Cable
(2)Battery Cable
(3)Vehicle Speed Sensor (VSS) (JE5)
(3)Vehicle Speed Sensor (VSS) (JE5)
(3)Vehicle Speed Sensor (VSS) (JE5)
(4)VSS (JE3)
(5)Transmission Harness
(6)Connector C409 (8 cavities)
(7)Engine Harness
Figure 19:

Transmission Harness to Automatic Transmission (MF1)
Object Number: 746245 Size: LF
(1)Automatic Transmission
(2)Backup Lamp Switch Connector (2 cavities)
(3)Vehicle Speed Sensor Connector (2 cavities)
(4)Vehicle Speed Sensor
(5)Automatic Transmission Modulator
(6)Neutral Safety Switch
(7)Neutral Safety Switch Connector (2 cavities)
(8)Battery Cable
(9)Connector C408 (2 cavities)
(10)Engine Harness
(11)Connector C409 (8 cavities)