Section 1 (Engine Control System - 4.2L - Introduction)
WARNING: This page is about a different variant/trim than selected.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Repair Instructions
- Powertrain Control Module (PCM) Replacement
- CKP System Variation Learn Procedure
- Engine Coolant Temperature (ECT) Sensor Replacement
- Intake Air Temperature (IAT) Sensor Replacement
- Manifold Absolute Pressure (MAP) Sensor Replacement
- Heated Oxygen Sensor Replacement - Position 1
- Heated Oxygen Sensor Replacement - Position 2
- Accelerator Pedal Position (APP) Sensor Replacement
- Throttle Body Assembly Replacement
- Fuel Pressure Relief Procedure
- Fuel Pressure Gage Installation and Removal
- Quick Connect Fitting(s) Service (Metal Collar)
- Quick Connect Fitting(s) Service (Plastic Collar)
- Fuel Tank Draining Procedure
- Fuel Tank Replacement (TrailBlazer EXT, Envoy XL, Envoy XUV)
- Fuel Tank Replacement (TrailBlazer, Envoy, Rainier)
- Fuel Tank Pressure Sensor Replacement
- Fuel Level Sensor Replacement
- Fuel Sender Assembly Replacement
- Fuel Hose/Pipes Replacement - Chassis
- Fuel Hose/Pipe Replacement - Tank (TrailBlazer EXT, Envoy XL, Envoy XUV)
- Fuel Hose/Pipe Replacement - Tank (TrailBlazer, Envoy, Rainier)
- Fuel Tank Filler Pipe Replacement (TrailBlazer EXT, Envoy XL, Envoy XUV)
- Fuel Tank Filler Pipe Replacement (TrailBlazer, Envoy, Rainier)
- Fuel System Cleaning
- Fuel Rail Assembly Replacement
- Fuel Injector Cleaning Procedure
- Fuel Injector Replacement
- Evaporative Emission (EVAP) Canister Purge Solenoid Valve Replacement
- Evaporative Emission (EVAP) Canister Vent Solenoid Valve Replacement
- Evaporative Emission (EVAP) Hoses/Pipes Replacement - Canister Vent
- Evaporative Emission (EVAP) Hoses/Pipes Replacement - Canister/Fuel Tank (TrailBlazer, Envoy, Rainier)
- Evaporative Emission (EVAP) Hoses/Pipes Replacement - Canister/Fuel Tank (TrailBlazer EXT, Envoy XL, Envoy XUV)
- Evaporative Emission (EVAP) Hoses/Pipes Replacement - Engine/Chassis
- Evaporative Emission (EVAP) Canister Replacement (TrailBlazer, Envoy, Rainier)
- Evaporative Emission (EVAP) Canister Replacement (Trailblazer EXT, Envoy XL, Envoy XUV)
- Evaporative Emission (EVAP) System Cleaning
- Ignition Coil(s) Replacement
- Spark Plug Inspection
- Spark Plug Replacement
- Crankshaft Position (CKP) Sensor Replacement
- Camshaft Position (CMP) Sensor Replacement
- Camshaft Position (CMP) Actuator Solenoid Valve Replacement
- Knock Sensor (KS) Replacement
- Secondary Air Injection (AIR) Pump Replacement
- Secondary Air Injection (AIR) Solenoid Valve Replacement
- Secondary Air Injection (AIR) Pipe Replacement
- Air Cleaner Element Replacement
- Air Cleaner Assembly Replacement
- Air Cleaner Outlet Resonator Replacement
- Air Cleaner Resonator Outlet Duct Replacement
- Description and Operation
- Powertrain Control Module (PCM) Description
- Throttle Actuator Control (TAC) System Description
- Camshaft Actuator System Description
- Fuel System Description
- Fuel System Overview
- Fuel Tank
- Fuel Fill Pipe
- Fuel Filler Cap
- Fuel Sender Assembly
- Fuel Level Sensor
- Fuel Pump
- Fuel Filter
- Fuel Pressure Regulator Assembly
- Fuel Feed Pipes
- Nylon Fuel Pipes
- Quick-Connect Fittings
- Fuel Rail Assembly
- Fuel Injectors
- Fuel Metering Modes of Operation
- Starting Mode
- Clear Flood Mode
- Run Mode
- Acceleration Mode
- Deceleration Mode
- Battery Voltage Correction Mode
- Fuel Cutoff Mode
- Fuel Trim
- Evaporative Emission (EVAP) Control System Description
- Electronic Ignition (EI) System Description
- Knock Sensor (KS) System Description
- Secondary Air Injection System Description
- Air Intake System Description
- Special Tools & Equipment