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Home >> GMC >> 1997 >> C3500 HD 6.5 F, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Component Tests - 7.4L >> Component Locations
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Component Locations

COMPONENT LOCATIONS

Component Location
A/C Compressor Clutch Cycling Switch In Low Pressure Refrigerant Line
A/C Compressor Clutch Relay In Low Pressure Refrigerant Line
A/C High Pressure Cut-Out Switch On Rear Of A/C Compressor
Air Injection Reaction Relay In Underhood Fuse/Relay Center At Left Rear Of Engine Compartment On Wheelwell
Auxiliary Cooling Fan Relay Left Rear Side Of Engine Compartment
Camshaft Position (CMP) Sensor In Distributor
Crankshaft Position (CKP) Sensor Lower Right Front Of Engine Block, Near Crankshaft
Cruise Control Module Left Rear Side Of Engine Compartment On Bulkhead
Data Link Connector (DLC) Under Left Side Of Instrument Panel
Distributor Top Of Engine, Near Bulkhead
EGR Valve Front Of Engine Near Thermostat Housing
Engine Coolant Temperature (ECT) Sensor Right Front Of Engine Near Thermostat Housing
EVAP Canister Purge Solenoid Right Center On Intake Manifold Near MAP Sensor
EVAP Canister Vent Near Master Cylinder, At Left Front Wheelwell
EVAP Purge Solenoid Vacuum Switch Right Rear Top Of Engine, Right Of Purge Solenoid
Fuel Injectors In Intake Manifold
Fuel Pump Oil Pressure Switch Rear Center Of Engine, Behind Distributor
Fuel Pump Prime Connector At Instrument Panel Harness, Near Fuse/Relay Center Breakout
Fuel Pump Relay In Underhood Fuse/Relay Center
Fuel Tank Pressure Sensor In Fuel Tank
Heater & A/C Control Module Center Of Instrument Panel At Heater Control
Idle Air Control (IAC) Valve Right Rear Of Throttle Body
Ignition Coil Right Rear Side Of Engine
Ignition Control Module Right Rear Side Of Engine
Intake Air Temperature (IAT) Sensor On Air Intake Duct
Knock Sensor Right Side Of Engine, Below Exhaust Manifold, Forward Of Starter
Manifold Absolute Pressure (MAP) Sensor Top Center Of Intake Manifold Near Fuel Injectors
Mass Airflow (MAF) Sensor On Air Intake Duct Near Air Filter
Oxygen Sensors In Exhaust Pipe In Front & Rear Of Catalytic Converter
Power Steering Control Module Under Center Of Instrument Panel
Throttle Position (TP) Sensor On Side Of Throttle Body
Transfer Case Relay Right Rear Of Engine Compartment, Near Center Of Cowl
Underhood Fuse/Relay Center Left Rear Of Engine Compartment On Wheelwell
Vehicle Control Module (VCM) In Engine Compartment, Near Master Cylinder At Left Front Wheelwell
Vehicle Speed Sensor Left Rear Side Of Transmission, (Left Side Of Transfer Case On Vehicles With 4WD)