Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 918 (ENGINE CONTROL SYSTEM & FUEL - 4.8L, 5.3L, 6.0L AND 6.2L - INTRODUCTION (2 OF 2))
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Section 918 (Engine Control System & Fuel - 4.8L, 5.3L, 6.0L And 6.2L - Introduction (2 Of 2))
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Section 918 (Engine Control System & Fuel - 4.8L, 5.3L, 6.0L And 6.2L - Introduction (2 Of 2))
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Engine Controls Component Views
- Engine Control Module Connectors
- Engine Controls Connectors
- Accelerator Pedal Position (APP) Sensor
- Camshaft Actuator Solenoid (LY6, L76, L92)
- Camshaft Position (CMP) Sensor (LY6, L76, L92)
- Crankshaft Position (CKP) Sensor
- Engine Coolant Temperature (ECT) Sensor
- Evaporative Emissions (EVAP) Canister Purge Solenoid Valve
- Evaporative Emissions (EVAP) Canister Purge Solenoid Valve (20 Series)
- Fuel Injector 1
- Fuel Injector 2
- Fuel Injector 3
- Fuel Injector 4
- Fuel Injector 5
- Fuel Injector 6
- Fuel Injector 7
- Fuel Injector 8
- Fuel Tank Pressure (FTP) Sensor
- Fuel Pump Relay - Secondary (Except NQZ)
- Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 (Except LY6 and L92)
- Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 (L92)
- Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 (LY6)
- Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 (Except LY6 and L92)
- Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 (L92)
- Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 (LY6)
- Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 (L92)
- Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 (LC9, LMG, LY5, LY2, L76)
- Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 (LY6)
- Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 (Except LY6)
- Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 (LY6)
- Ignition Coil 1
- Ignition Coil 2
- Ignition Coil 3
- Ignition Coil 4
- Ignition Coil 5
- Ignition Coil 6
- Ignition Coil 7
- Ignition Coil 8
- Knock Sensor (KS) - 1
- Knock Sensor (KS) - 2
- Manifold Absolute Pressure (MAP) Sensor
- Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor
- Throttle Body
- Valve Lifter Oil Manifold (VLOM) Assembly (AFM)
- Diagnostic Information and Procedures
- Repair Instructions
- Engine Control Module Replacement
- Crankshaft Position System Variation Learn
- Throttle Learn
- Engine Coolant Temperature Sensor Replacement
- Mass Airflow Sensor/Intake Air Temperature Sensor Replacement
- Manifold Absolute Pressure Sensor Replacement
- Power Brake Booster Vacuum Sensor Replacement
- Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (1500 Series)
- Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (2500 Series)
- Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (1500 Series)
- Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (2500 Series)
- Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (1500 Series)
- Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (2500 Series)
- Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (1500 Series)
- Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (2500 Series)
- Accelerator Pedal Position Sensor Replacement
- Throttle Body Assembly Replacement
- Throttle Body Cleaning
- Fuel Pressure Gage Installation and Removal
- Fuel Pressure Relief
- Quick Connect Fitting Service - Metal Collar
- Quick Connect Fitting Service - Plastic Collar
- Fuel Tank Draining (Dual Tanks - Front)
- Fuel Tank Draining (Dual Tanks - Rear)
- Fuel Tank Draining (Single Tank)
- Fuel Tank Filler Pipe Replacement (1500 Series)
- Fuel Tank Filler Pipe Replacement (2500 Series)
- Fuel Tank Replacement (1500 LWB - 117.3L (31 gal) Tank)
- Fuel Tank Replacement (1500 LWB - 117.3L (31 gal) Tank + E85)
- Fuel Tank Replacement (1500 SWB - 98.4L (26 gal) Tank)
- Fuel Tank Replacement (1500 SWB - 98.4L (26 gal) Tank + E85)
- Fuel Tank Replacement (2500 LWB - 43.5L (11.5 gal) Tank-Rear)
- Fuel Tank Replacement (2500 LWB - 98.4L (26 gal) Tank-Front)
- Fuel Tank Pressure Sensor Replacement (1500 LWB - 117.3L (31 gal) Tank + E85)
- Fuel Tank Pressure Sensor Replacement (1500 SWB - 98.4L (26 gal) Tank + E85)
- Fuel Tank Pressure Sensor Replacement (1500 Series)
- Fuel Tank Pressure Sensor Replacement (2500 Series)
- Fuel Tank Pump Module Replacement (1500 LWB - 117.3L (31 gal) Tank + E85)
- Fuel Tank Pump Module Replacement (1500 SWB - 98.4L (26 gal) Tank + E85)
- Fuel Tank Pump Module Replacement (1500 Series)
- Fuel Tank Pump Module Replacement (2500 LWB - 43.5L (11.5 gal) Tank-Rear)
- Fuel Tank Pump Module Replacement (2500 LWB - 98.4L (26 gal) Tank-Front)
- Fuel Level Sensor Replacement (1500 Series)
- Fuel Level Sensor Replacement (1500 Series w/E85)
- Fuel Level Sensor Replacement (2500 - 43.5L (11.5 gal) Tank - Rear)
- Fuel Level Sensor Replacement (2500 - 98.4L (26 gal) Tank - Front)
- Fuel Hose/Pipes Replacement - Chassis (1500 Series)
- Fuel Hose/Pipes Replacement - Chassis (2500 Series)
- Fuel Hose/Pipes Assembly Replacement (1500 LWB - 117.3L (31 gal) Tank )
- Fuel Hose/Pipes Assembly Replacement (1500 LWB - 117.3L (31 gal) Tank + E85)
- Fuel Hose/Pipes Assembly Replacement (1500 SWB - 98.4L (26 gal) Tank)
- Fuel Hose/Pipes Assembly Replacement (1500 SWB - 98.4L (26 gal) Tank + E85)
- Fuel System Cleaning
- Fuel Rail Assembly Replacement
- Fuel Rail Crossover Pipe Replacement
- Fuel Injector Replacement
- Fuel Injector Cleaning
- Evaporative Emission Canister Purge Solenoid Valve Replacement
- Evaporative Emission Canister Vent Solenoid Valve Replacement (1500 Series)
- Evaporative Emission Canister Vent Solenoid Valve Replacement (2500 Series)
- Evaporative Emission System Hoses/Pipes Replacement (2500 LWB - 98.4L (26 gal) Tank-Front)
- Evaporative Emission System Hoses/Pipes Replacement (2500 LWB - Intermediate)
- Evaporative Emission Hoses/Pipes Replacement - Engine
- Evaporative Emission Hoses/Pipes Replacement - Chassis (1500 Series)
- Evaporative Emission Hoses/Pipes Replacement - Chassis (2500 Series)
- Evaporative Emission Hoses/Pipes Replacement - Canister/Fuel Tank (1500 LWB - 117.3L (31 gal) Tank)
- Evaporative Emission Hoses/Pipes Replacement - Canister/Fuel Tank (1500 LWB - 117.3L (31 gal) Tank w/E85)
- Evaporative Emission Hoses/Pipes Replacement - Canister/Fuel Tank (1500 SWB - 98.4L (26 gal) Tank)
- Evaporative Emission Hoses/Pipes Replacement - Canister/Fuel Tank (1500 LWB - 98.4L (26 gal) Tank w/E85)
- Evaporative Emission Hoses/Pipes Replacement - Canister/Fuel Tank (2500 LWB - 43.5L (11.5 gal) Tank-Rear)
- Evaporative Emission Canister Replacement (1500 Series)
- Evaporative Emission Canister Replacement (2500 Series)
- Evaporative Emission System Cleaning
- Ignition Coil Replacement
- Spark Plug Wire Inspection
- Spark Plug Wire Replacement
- Spark Plug Inspection
- Spark Plug Replacement
- Crankshaft Position Sensor Replacement
- Camshaft Position Sensor Replacement (RPOs LY2/LC9/LY5/LMG)
- Camshaft Position Sensor Replacement (RPOs LY6/L76/L92)
- Knock Sensor 1 Replacement
- Knock Sensor 2 Replacement
- Air Cleaner Element Replacement
- Air Cleaner Assembly Replacement
- Air Cleaner Resonator Outlet Duct Replacement
- Description and Operation
- Engine Control Module Description
- Cylinder Deactivation (Active Fuel Management) System Description
- Throttle Actuator Control (TAC) System Description
- Camshaft Actuator System Description
- Fuel System Description
- Fuel System Overview
- E85 Flex Fuel Description
- Switching Between Gasoline and E85
- Fuel Tanks
- Fuel Fill Pipe
- Fuel Filler Cap
- Fuel Sender Assembly
- Fuel Level Sensor
- Fuel Pump
- Rear Fuel Pump (Dual Tank Applications Only)
- Fuel Strainer
- Fuel Filter
- Nylon Fuel Pipes
- Quick-Connect Fittings
- On-Board Refueling Vapor Recovery System (ORVR)
- Fuel Pipe O-Rings
- Fuel Rail Assembly
- Fuel Injectors
- Fuel Pressure Regulator
- Fuel Metering Modes of Operation
- Fuel Trim
- Evaporative Emission Control System Description
- Electronic Ignition (EI) System Description
- Knock Sensor (KS) System Description
- Special Tools and Equipment
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.