Engine Controls Component Views. Chevrolet Chevy C Cab/Chassis HD (GMT 400) 2001

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:

C100, C103, and C104-Left Rear of Engine Compartment


(1)	Engine Harness
(2)	C100
(3)	C104
(4)	C103
(5)	Tail Lamps Extension Harness

Figure 2:

C100, C102, Underhood Fuse Block, EBCM, and Brake Pressure Differential Switch


(1)	Forward Lamps Harness
(2)	Underhood Fuse Block
(3)	Electric Brake Control Module (EBCM)
(4)	Brake Pressure Differential Switch
(5)	Wheel Speed Sensor Harness
(6)	Engine Harness
(7)	C100
(8)	Glow Plug Power Wire - L65
(9)	Battery Positive Wire
(10)	C102

Figure 3:

C106, C112, C113, C114, Fuel Filter Connectors, and Glow Plug Relay


(1)	Glow Plug Relay Connector
(2)	Water in fuel Sensor - 3-way
(3)	C114 - 3-way
(4)	C112 - 8-way
(5)	C113 - 15-way
(6)	Fuel Heater - 2-way
(7)	Engine Harness
(8)	C106 - 1-way
(9)	Glow Plug Relay
(10)	Glow Plug Harness - Left Side
(11)	Engine Harness to Front of Engine
(12)	Engine Harness

Figure 4:

Engine Oil Pressure (EOP) Sensor and Fuel Pump Switch


(1)	Engine Oil Pressure (EOP) Sensor and Fuel Pump Switch
(2)	Engine Block

Figure 5:

Glow Plug Relay and Turbocharger Wastegate Solenoid


(1)	Intake Manifold
(2)	Glow Plug Relay
(3)	Engine Wiring Harness
(4)	Glow Plug Harness - Left Side
(5)	Injector - Typical
(6)	Glow Plug - Typical
(7)	Turbocharger Wastegate Solenoid

Figure 6:

C115, A/C Compressor, and Engine Coolant Temperature (ECT) Gauge Sensor


(1)	Air Cleaner
(2)	C115
(3)	A/C High Pressure Recirculation Switch Connector
(4)	Turbocharger Wastegate Solenoid
(5)	Glow Plug Relay
(6)	Engine Harness
(7)	Glow Plug Harness - Left Side
(8)	Injector - Typical
(9)	Glow Plugs - Typical
(10)	Engine Coolant Temperature (ECT) Gage Sensor
(11)	A/C High Pressure Switch
(12)	A/C Compressor
(13)	A/C Compressor Clutch Connector

Figure 7:

Crankshaft Position (CKP) Sensor


(1)	Front Engine Cover
(2)	Crankshaft Position (CKP) Sensor
(3)	Mounting Bolt

Figure 8:

C115, Generator, and Engine Coolant Temperature Sensor - L65


(1)	C115
(2)	Engine Coolant Temperature (ECT) Sensor
(3)	Generator
(4)	Generator Connector
(5)	Generator Jumper Harness

Figure 9:

Overhead Engine View, IAT, MAP, ECT Sensors


(1)	Glow Plug Relay
(2)	Turbocharger Wastegate Solenoid
(3)	Intake Air Temperature (IAT) Sensor
(4)	Turbocharger Boost Sensor
(5)	Engine Coolant Temperature (ECT) Sensor
(6)	Wastegate Actuator
(7)	Turbocharger
(8)	Crankcase Depression Regulator (CDR) Valve
(9)	Fuel Filter, Heater, Water-in-Fuel Sensor

Figure 10:

Fuel Filter/Manager and Fuel Injection Pump


(1)	Fuel Filter/Manager Housing
(2)	Fuel Hose to Injection Pump
(3)	Fuel Injection Pump
(4)	Intake Manifold
(5)	Fuel/Water Separator Hose to Water Drain Valve
(6)	Water in fuel Indicator Sensor
(7)	Fuel Heater

Figure 11:

ECT Sensor, ITS Motor, and Fuel Temperature Sensor/Optical CMP Sensor


(1)	Engine Coolant Temperature (ECT) Sensor
(2)	Fuel Injection Pump
(3)	Injection Timing Stepper (ITS) Motor
(4)	Fuel Solenoid
(5)	Fuel Temperature Sensor and Optical Camshaft Position (CMP) Sensor

Figure 12:

Fuel Solenoid and Fuel Solenoid Driver, ESO Solenoid, and Fuel Temperature Sensor


(1)	Fuel Temperature Sensor and Optical Camshaft Position (CMP) Sensor
(2)	Fuel Injection Pump
(3)	Fuel Solenoid
(4)	Fuel Injector Lines
(5)	Fuel Solenoid Driver
(6)	Engine Shut Off (ESO) Solenoid

Figure 13:

G110 and Starter


(1)	Engine Harness
(2)	Glow Plug Wiring
(3)	Exhaust Manifold
(4)	Starter Solenoid Stud
(5)	Starter Wire
(6)	Battery Positive Cable
(7)	Starter
(8)	Frame
(9)	Ground Strap from Engine
(10)	G110
(11)	Ground from Body
(12)	Heat Shield

Figure 14:

Coolant Level Switch, P101, G108, and A/C Low Pressure Switch


(1)	Coolant Reservoir
(2)	A/C Low Pressure Switch
(3)	G108
(4)	Underhood Lamp Connector
(5)	Underhood Lamp Ground Strap
(6)	Engine Harness
(7)	Radiator Surge Hose
(8)	P101
(9)	Coolant Return Hose
(10)	Coolant Level Switch

Figure 15:

Vehicle Speed Sensor, C122, and Park/Neutral Position (PNP) Switch - Automatic Transmission


(1)	Engine Harness
(2)	Vehicle Speed Sensor (VSS) - Transmission Output Shaft Speed Sensor
(3)	C122
(4)	PNP C2
(5)	PNP C1
(6)	PNP Switch
(7)	Automatic Transmission Input Shaft Speed (ISS) Sensor

Figure 16:

Vehicle Speed Sensor and Backup Lamp Switch - Manual Transmission


(1)	Engine Harness
(2)	Vehicle Speed Sensor (VSS) - Transmission Output Shaft Speed Sensor
(3)	Connector to Backup Lamp Switch

Figure 17:

G404, Fuel Tank and Level Sensor Assembly


(1)	Frame Rail - Left
(2)	Fuel Lines
(3)	Ground G404
(4)	Fuel Tank
(5)	Fuel Level Sensor Assembly

Figure 18:

Fuel Balance Module, Balance Pump Relay, and Fuel Pump


(1)	Left Frame Rail
(2)	Left Rear Cab Mount
(3)	Fuel Balance Pump Relay
(4)	Fuel Pump
(5)	Tail Lamps Extension Harness
(6)	Fuel Pump Connector
(7)	Fuel Balance Module

Figure 19:

Auxiliary Fuel Tank and Fuel Pump - Secondary - Dual Tank Option


(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 20:

C200, C203, C204, PCM, and VSS Buffer


(1)	C200
(2)	C204
(3)	IP Harness
(4)	IP Compartment Opening
(5)	Powertrain Control Module (PCM) - L65
(6)	Vehicle Speed Sensor (VSS) Buffer
(7)	HVAC Module
(8)	C203

Figure 21:

VSS Buffer Mounting


(1)	PCM Mounting Tray
(2)	Blower Motor
(3)	VSS Buffer

Figure 22:

Theft Deterrent Control Module and DRL Diode


(1)	IP Harness
(2)	Daytime Running Lamps (DRL) Diode Connector
(3)	DRL Diode
(4)	Theft Deterrent Control Module Connector
(5)	Theft Deterrent Control Module

Figure 23:

Accelerator Pedal Position (APP) Sensor


(1)	IP Harness
(2)	Accelerator Pedal Position (APP) Sensor

Figure 24:

Data Link Connector (DLC)


(1)	Data Link Connector (DLC)