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

IP, Center View
Object Number: 740177 Size: LF
(1)Engine Hour Meter
(2)Air Brake Pressure Gauge Lamp
(3)Air Brake Pressure Gage
(4)Ammeter (w/Ammeter Lamp)
(5)C236 (4 cavities) (LG5 w/o KPJ)
(6)Hazard Indicator Lamp (part of the HAZARD Name Plate)
(7)Right IP Trim Bezel
(8)Hazard Switch
(9)Center IP Trim Bezel
(10)Automatic Transmission (A/T) Selector Control
(11)Left IP Trim Bezel
(12)Low Air Pressure Switch
Figure 2:

Engine Harness, Left Front (LG5)
Object Number: 235946 Size: LF
(1)Engine Speed Governor Control Module
(2)Air Intake Heater Engine Coolant Temperature (ECT) Switch
(3)Engine Coolant Temperature (ECT) Gauge Sensor
Figure 3:

Left Side of IP (Components), Forward
Object Number: 220291 Size: MF
(1)IP Lamps Dimmer Switch
(2)Instrument Cluster
(3)Exhaust Brake Clutch Switch Jumper Plug
(4)Exhaust Brake Clutch Switch
(5)Upfitter Connector (23 cavities)
(6)Upfitter Connector Jumper (23 cavities)
(7)Upfitter IP (+) Junction Block
(8)Daytime Running Lamp (DRL) Control Module
(9)Driver Information Center
(10)Headlamps Switch
Figure 4:

Engine Harness (LP4/L21), Upper Right Front View
Object Number: 235950 Size: LF
(1)Throttle Body Fuel Injector 1
(2)Throttle Body Fuel Injector 2
(3)Engine Speed Governor Motor
(3)Engine Speed Governor Module
(4)Engine Coolant Temperature (ECT) Gauge Sensor
(5)Engine Speed Governor Module
(6)Knock Sensor (KS) Module
(6)Knock Sensor (KS) Module
(7)Exhaust Gas Recirculation (EGR) Electronic Vacuum Regulator Solenoid Valve
(8)Throttle Position (TP) Sensor
(9)Idle Air Control (IAC) Valve
(10)Manifold Absolute Pressure (MAP)
Figure 5:

Engine Harness (LG5), Left Forward
Object Number: 228996 Size: LF
(1)Air Intake Heater Control Module
(2)Air Intake Heater Engine Oil Pressure Indicator Switch
(3)Engine Oil Pressure Gauge Sensor
(4)Low Engine Oil Pressure Indicator Switch
(5)Fuel Shutoff Solenoid Valve
(6)Exhaust Brake Accelerator Switch
Figure 6:

Engine Harness Components (LP4/L21), Upper Left Rear
Object Number: 216233 Size: LF
(1)Distributor Ignition (DI) Control Module C2 (2 cavities)
(2)Distributor Ignition (DI) Control Module C1 (4 cavities)
(3)Distributor
(4)Oxygen (O2) Sensor
(5)Engine Oil Pressure Gauge Sensor and Fuel Pump Switch
(6)Ignition Coil C2 (2 cavities)
(7)Ignition Coil C1 (2 cavities)
Figure 7:

Engine Harness to Generator (LP4/L21), Upper Right Forward
Object Number: 216265 Size: LF
(1)Generator Fuse
(2)Generator C2 (ring terminal)
(3)Generator C3 (2 cavities)
(4)Generator R Terminal
(5)Generator
(6)Generator BATT Terminal
(7)Generator C1 (ring terminal)
Figure 8:

Radiator Surge Tank, Right Forward View
Object Number: 228302 Size: LF
(1)Coolant Level Switch (LG5 shown, L18 similar)
Figure 9:

IP Harness to Dash Panel, Right Forward
Object Number: 230863 Size: LF
(1)Relay Center
(2)Vehicle Speed Sensor (VSS) Buffer
(3)Fuse Block 2
(4)Fuse Block 1
(5)IP Fuse Block/Mini-Relay Center
(6)Relay Block 3
(7)Relay Block 2
(8)Flasher/Relay Center
(9)Relay Block 1
Figure 10:

Manual Transmission Harness, Left Forward View
Object Number: 228367 Size: LF
(1)Backup Lamp Switch
(2)Vehicle Speed Sensor (VSS) (JE4)
(3)Vehicle Speed Sensor (VSS) (JE3)
Figure 11:

Engine Harness to Radiator, Right Forward View
Object Number: 239919 Size: LF
(1)Transmission Fluid Temperature (TFT) Sensor