Engine Controls Component Views. GMC Truck GMC C Sierra

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Engine Controls Component Views

Figure 1:

VCM


(1)	VCM Cover
(2)	Vehicle Control Module (VCM)
(3)	Battery

Figure 2:

Underhood Electrical Center


(1)	Underhood Electrical Center
(2)	Forward Lamp Harness
(3)	Chassis Harness
(4)	Underhood Electrical Center Mounting Bracket
(5)	Left Front Wheel House
(6)	Left Front Inner Fender
(7)	Instrument Panel Harness
(8)	Engine Harness

Figure 3:

RF of the Engine Compartment Components (4.3L)


(1)	Air Cleaner Assembly
(2)	Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Assembly
(3)	Air Inlet Tube
(4)	Generator

Figure 4:

Crankshaft Position (CKP) Sensor


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

Figure 5:

Crankshaft Position (CKP) Reluctor Wheel


(1)	Crankshaft Position (CKP) Reluctor Wheel
(2)	Crankshaft
(3)	Engine Block

Figure 6:

Top of the Engine Components (4.3L)


(1)	Throttle Position (TP) Sensor
(2)	Idle Air Control (IAC) Valve
(3)	Ignition Coil
(4)	Evaporative (EVAP) Canister Purge Solenoid
(5)	Oil Pressure Switch
(6)	Knock Sensor (KS)
(7)	Fuel Pressure Connection Valve
(8)	Positive Crankcase Ventilation Valve (PCV)

Figure 7:

MAP, EGR, Purge Solenoid, and Throttle Body


(1)	Throttle Body
(2)	Exhaust Gas Recirculation (EGR) Valve
(3)	Generator
(4)	Evaporative Emission (EVAP) Canister Purge Valve
(5)	Manifold Absolute Pressure (MAP) Sensor

Figure 8:

Left Side of the Engine Components (4.3L)


(1)	Bank 1 Cylinder Head
(2)	Engine Coolant Temperature (ECT) Sensor

Figure 9:

Ignition Coil, Ignition Control (IC) Module, MAP, Throttle Body, and Evaporative (EVAP) Canister Purge Valve


(1)	EVAP Pipe
(2)	Injector Assembly Electrical Connector
(3)	Throttle Body
(4)	Manifold Absolute Pressure (MAP) Sensor
(5)	Ignition Control (IC) Module
(6)	Ignition Coil
(7)	Evaporative (EVAP) Canister Purge Valve

Figure 10:

Top Rear of the Engine Components (4.3L)


(1)	Camshaft Position (CMP) sensor
(2)	Oil Pressure Switch
(3)	Knock Sensor (KS)

Figure 11:

Oxygen Sensors (4.3L)


(1)	HO2S Bank 2 Sensor 2
(2)	HO2S Bank 1 Sensor 2
(3)	HO2S Bank 1 Sensor 1
(4)	HO2S Bank 2 Sensor 1

Figure 12:

Automatic Transmission (4.3L w/2WD)


(1)	Vehicle Speed Sensor (VSS)

Figure 13:

Manual Transmission (4.3L w/2WD)


(1)	Vehicle Speed Sensor (VSS)

Figure 14:

Transfer Case (4.3L A/T w/4WD)


(1)	Vehicle Speed Sensor (VSS)

Figure 15:

Transfer Case (4.3L M/T w/4WD)


(1)	Manual Transmission
(2)	Vehicle Speed Sensor (VSS)
(3)	Transfer Case (4WD)

Figure 16:

EVAP Canister and Vent Valve


(1)	Left Frame Rail
(2)	EVAP Vent Valve
(3)	Fuel Tank
(4)	EVAP Canister

Figure 17:

Fuel Tank Pressure Sensor and Fuel Level Sender Assembly


(1)	Fuel Tank
(2)	Fuel Tank Pressure Sensor Connector
(3)	Fuel Level Sender Connector
(4)	Fuel Tank Sender Assembly

Figure 18:

AIR System (RPO NC1 only), AC Accumulator


(1)	AIR Pump
(2)	Vacuum Hose to AIR Solenoid
(3)	A/C Compressor Cycling Switch
(4)	A/C Accumulator
(5)	AIR Hose to AIR Pipes
(6)	AIR Solenoid
(7)	AIR Pump Shut Off Valve
(8)	Fender to Cowl Brace