GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Chevy C Cab/Chassis HD (GMT 400) 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Engine Controls Component Views
Figure 1:

Throttle Actuator Control (TAC) Module
Object Number: 696063 Size: MF
(1)Cowl
(2)TAC Module Connector C2
(3)Throttle Actuator Control (TAC) Module
(4)TAC Connector C1
(5)Left Side Inner Fender
(6)Fuse Block - Underhood
(7)Passthrough P100
(8)Engine Harness
Figure 2:

Fuse Block - Underhood, PCM, EBCM, and Aux Battery
Object Number: 696066 Size: MF
(1)Fuse Block - Underhood
(2)Connectors to PCM
(3)Powertrain Control Module (PCM)
(4)Left Side Fender
(5)EBCM Connector C1
(6)Auxiliary Battery, if equipped
(7)EBCM Connector C3
(8)Electronic Brake Control Module (EBCM)
(9)Engine Harness
Figure 3:

A/C Compressor Connectors, C105, and C148
Object Number: 716309 Size: MF
(1)A/C High Pressure Recirculation Switch
(2)A/C High Pressure Recirculation Switch Connector
(3)Engine Harness
(4)Connector C105 to Fuel Injector Harness
(5)Connector C148 to Ignition Coil Harness - Left Side
(6)A/C High Pressure Switch
(7)A/C Compressor Clutch Connector
Figure 4:

Throttle Body and EVAP Control
Object Number: 696068 Size: MF
(1)Engine Harness
(2)Intake Manifold
(3)Evaporative Emission (EVAP) Canister Purge Solenoid
(4)Throttle Position (TP) Sensor
(5)Throttle Position (TP) Sensor Connector
(6)Throttle Actuator Control Motor
(7)Throttle Actuator Control Motor Connector
(8)Evaporative Emission (EVAP) Canister Purge Solenoid Connector
Figure 5:

Camshaft Position (CMP) Sensor and Knock Sensor (KS) - Left Side
Object Number: 696070 Size: MF
(1)Camshaft Position (CMP) Sensor
(2)Knock Sensor (KS) - Left Side
Figure 6:

MAP Sensor, ECT Sensor, and Ignition Coils - Right Side
Object Number: 696072 Size: MF
(1)Manifold Absolute Pressure (MAP) Sensor
(2)Engine Harness
(3)Ignition Coil (IC) - Right Side - Typical
(4)Connector C149 - Engine Harness
(5)Engine Coolant Temperature (ECT) Sensor Connector
(6)ECT Sensor - Engine Harness
(7)C149 - Right Side Ignition Coil Harness
Figure 7:

Starter and Knock Sensor - Bank 2
Object Number: 712941 Size: MF
(1)Starter Solenoid Terminal
(2)Battery Positive Wire for Starter
(3)Knock Sensor - Bank 2
(4)Engine Harness
Figure 8:

MAF and IAT Sensor
Object Number: 696074 Size: MF
(1)Engine Coolant Reservoir
(2)Engine Harness
(3)Air Cleaner
(4)MAF and IAT Sensor Connector
(5)Battery
Figure 9:

P101, A/C Low Pressure Switch and G108
Object Number: 696075 Size: MF
(1)Right Fender
(2)Engine Coolant Reservoir
(3)A/C Low Pressure Switch
(4)A/C Refrigerant Accumulator
(5)Ground G108
(6)Connector for Underhood Lamp
(7)Refrigerant Suction Line
(8)Engine Harness
(9)Radiator Overflow Hose
(10)Passthrough P101
Figure 10:

EGR Valve, Engine Oil Pressure (EOP) Sensor, G104, and G105
Object Number: 696079 Size: MF
(1)Exhaust Gas Recirculation (EGR) Valve
(2)Engine Oil Pressure (EOP) Sensor
(3)Engine Oil Pressure (EOP) Sensor Connector
(4)Ground G104
(5)Ground G105
(6)Engine Harness
Figure 11:

Crankshaft Position (CKP) Sensor and Engine Oil Pressure (EOP) Sensor
Object Number: 696081 Size: MF
(1)Engine Oil Pressure (EOP) Sensor
(2)Crankshaft Position (CKP) Sensor
Figure 12:

Manual Transmission
Object Number: 675761 Size: MF
(1)Engine Wiring Harness
(2)Breakout to Heated Oxygen Sensor - Bank 2
(3)Vehicle Speed Sensor
(4)Backup Lamps Switch
(5)Heated Oxygen Sensor - Bank 1
Figure 13:

Automatic Transmission
Object Number: 675762 Size: MF
(1)Breakout to Heated Oxygen Sensor - Bank 2
(2)Vehicle Speed Sensor/Transmission Output Shaft Speed Sensor
(3)Connector C122
(4)Park/Neutral Position Switch C2
(5)Park/Neutral Position Switch C1
(6)Park/Neutral Position (PNP) Switch
(7)Transmission Input Shaft Speed Sensor
(8)Heated Oxygen Sensor - Bank 1
(9)Engine Wiring Harness
Figure 14:

Heated Oxygen Sensor (H02S) - Bank 2
Object Number: 696086 Size: MF
(1)Engine Harness
(2)Heated Oxygen Sensor - Bank 2
(3)Transmission - A/T shown, M/T similar
(4)Heated Oxygen Sensor Connector
Figure 15:

Fuel Tank and G404
Object Number: 705230 Size: MF
(1)Fuel Pump and Sender Assembly
(2)Ground G404
(3)Fuel Tank
(4)Fuel Pump and Sender Assembly Connector
(5)Tail Lamps Extension Harness
Figure 16:

Fuel Balance Module - Dual Tanks, and Fuel Filter
Object Number: 705233 Size: MF
(1)Frame Cross Member
(2)Fuel Balance Module Connector C1
(3)Left Rear Cab Mount
(4)Fuel Balance Pump Relay
(5)Fuel Filter
(6)Fuel Balance Module
(7)Fuel Balance Module Connector C2
Figure 17:

Auxiliary Fuel Tank and Fuel Pump - Secondary - Dual Tank Option
Object Number: 705239 Size: MF
(1)Left Tail Lamp Assembly
(2)Tail Lamp Extension Harness
(3)Fuel Pump - Secondary
(4)Fuel Pump - Secondary Connector
(5)Fuel Level Sensor - Secondary Assembly
(6)Fuel Level Sensor - Secondary Connector
(7)Auxiliary Fuel Tank
Figure 18:

Accelerator Pedal Position (APP) Sensor
Object Number: 696088 Size: MF
(1)IP Harness
(2)Accelerator Pedal Position (APP) Sensor
Figure 19:

Data Link Connector (DLC)
Object Number: 542437 Size: MF
(1)Data Link Connector (DLC)
Figure 20:

Theft Deterrent Control Module and DRL Diode
Object Number: 372215 Size: MF
(1)IP Harness
(2)Daytime Running Lamps (DRL) Diode Connector
(3)DRL Diode
(4)Theft Deterrent Control Module Connector
(5)Theft Deterrent Control Module