October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
Engine Control System - 4.2L (Introduction) Expand All (for easy ctrl-f) Collapse All 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 Filter Replacement Fuel Tank Draining Procedure Fuel Tank Replacement (TrailBlazer, Envoy, Bravada, Rainier) Fuel Tank Replacement (TrailBlazer EXT, Envoy XL, Envoy XUV) Fuel Tank Pressure Sensor Replacement Fuel Level Sensor Replacement Fuel Sender Assembly Replacement Fuel Hose/Pipes Replacement - Filter to Engine Fuel Hoses/Pipes Replacement - Filter to Tank Fuel Filler Hose Replacement Fuel System Cleaning Fuel Rail Assembly Replacement Fuel Pressure Regulator Replacement Fuel Injector Replacement Fuel Injector Cleaning Procedure Evaporative Emission (EVAP) Canister Purge Solenoid Valve Replacement Evaporative Emission (EVAP) Canister Vent Solenoid Valve Replacement Evaporative Emission (EVAP) Hoses/Pipes Replacement - Canister/Fuel Tank (Vent Pipe) Evaporative Emission (EVAP) Hoses/Pipes Replacement - Canister/Fuel Tank (Vapor Pipe) Evaporative Emission (EVAP) Hoses/Pipes Replacement - Engine/Chassis Evaporative Emission (EVAP) Canister Replacement (TrailBlazer EXT, Envoy XL, Envoy XUV) Evaporative Emission (EVAP) Canister Replacement (TrailBlazer, Envoy, Bravada, Rainier) 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 Special Tools and Equipment