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Engine Control System & Component Tests - 5.7L: Component Locations Chevrolet Tahoe I

Testing & Diagnostics 1 illustration

RELAY LOCATION

ApplicationLocation
"C" & "K" SeriesIn Underhood Fuse/Relay Center, Near Anti-Lock Brake Control Module

A/C COMPRESSOR CLUTCH RELAY LOCATION

WARNINGVehicles may be equipped with a PCM using an Electronically Erasable Programmable Read Only Memory (EEPROM). When replacing PCM, the new PCM must be programmed.

Note. To help save diagnostic time, ALWAYS check for blown fuses or fusible links before proceeding with any testing. If fuses are blown, locate and repair short circuit before replacing fuses. Ensure all related relay and wire harness connections are clean and tight. Repair as necessary.

COMPONENT LOCATIONS

ComponentLocation
A/C Compressor Clutch Cycling SwitchIn Low Pressure Refrigerant Line
A/C Compressor Clutch RelayIn Low Pressure Refrigerant Line
A/C High Pressure Cut-Out SwitchOn Rear Of A/C Compressor
Air Injection Reaction RelayIn Underhood Fuse/Relay Center At Left Rear Of Engine Compartment On Wheelwell
Auxiliary Cooling Fan RelayLeft Rear Side Of Engine Compartment
Camshaft Position (CMP) SensorIn Distributor
Crankshaft Position (CKP) SensorLower Right Front Of Engine Block, Near Crankshaft
Cruise Control ModuleLeft Rear Side Of Engine Compartment On Bulkhead
Data Link Connector (DLC)Under Left Side Of Instrument Panel
DistributorTop Of Engine, Near Bulkhead
EGR ValveFront Of Engine Near Thermostat Housing
Engine Coolant Temperature (ECT) SensorRight Front Of Engine Near Thermostat Housing
EVAP Canister Purge SolenoidRight Center On Intake Manifold Near MAP Sensor
EVAP Canister VentNear Master Cylinder, At Left Front Wheelwell
EVAP Purge Solenoid Vacuum SwitchRight Rear Top Of Engine, Right Of Purge Solenoid
Fuel InjectorsIn Intake Manifold
Fuel Pump Oil Pressure SwitchRear Center Of Engine, Behind Distributor
Fuel Pump Prime ConnectorAt Instrument Panel Harness, Near Fuse/Relay Center Breakout
Fuel Pump RelayIn Underhood Fuse/Relay Center
Fuel Tank Pressure SensorIn Fuel Tank
Heater & A/C Control ModuleCenter Of Instrument Panel At Heater Control
Idle Air Control (IAC) ValveRight Rear Of Throttle Body
Ignition CoilRight Rear Side Of Engine
Ignition Control ModuleRight Rear Side Of Engine
Intake Air Temperature (IAT) SensorOn Air Intake Duct
Knock SensorRight Side Of Engine, Below Exhaust Manifold, Forward Of Starter
Manifold Absolute Pressure (MAP) SensorTop Center Of Intake Manifold Near Fuel Injectors
Mass Airflow (MAF) SensorOn Air Intake Duct Near Air Filter
Oxygen SensorsIn Exhaust Pipe In Front & Rear Of Catalytic Converter
Power Steering Control ModuleUnder Center Of Instrument Panel
Throttle Position (TP) SensorOn Side Of Throttle Body
Transfer Case RelayRight Rear Of Engine Compartment, Near Center Of Cowl
Underhood Fuse/Relay CenterLeft Rear Of Engine Compartment On Wheelwell
Vehicle Control Module (VCM)In Engine Compartment, Near Master Cylinder At Left Front Wheelwell
Vehicle Speed SensorLeft Rear Side Of Transmission, (Left Side Of Transfer Case On Vehicles With 4WD)

COMPONENT LOCATIONS

Cooling Fan System Wiring Diagram. Scheme 24

Scheme 24: Cooling Fan System Wiring Diagram