2008 Chevrolet Silverado 2500 HD Service and Repair Manual

This 2008 Chevrolet Silverado 2500HD Service & Repair Manual Covers

Engine & Drivetrain

• 6.0L Vortec LY6 V8 gasoline engine
• 6.0L Vortec L96 V8 (fleet applications where equipped)
• 6.6L Duramax LMM Turbo Diesel V8
• Common Rail diesel fuel injection system diagnostics
• Variable Geometry Turbocharger (VGT) servicing
• Diesel particulate filter (DPF) diagnostics and regeneration procedures
• Exhaust Gas Recirculation (EGR) system servicing
• Engine cooling and lubrication system repairs
• Fuel delivery and emissions system diagnostics
• 6L90 six-speed automatic transmission servicing
• Allison 1000 six-speed automatic transmission servicing
• ZF S6-650 six-speed manual transmission servicing
• NVG261 and NVG263 transfer case servicing
• Front and rear differential servicing
• Driveshaft, axle shaft, and universal joint repairs
• 2WD and 4WD drivetrain diagnostics

Suspension & Steering

• Independent front suspension servicing
• Heavy-duty rear leaf spring suspension
• Torsion bar front suspension adjustments
• Hydraulic power steering diagnostics
• Steering gear servicing
• Wheel hub and bearing replacement
• Wheel alignment specifications
• Heavy-duty chassis inspection procedures

Braking Systems

• Four-wheel disc brake servicing
• Anti-lock Braking System (ABS)
• StabiliTrak electronic stability control
• Traction Control System (TCS)
• Hydro-Boost braking system
• Integrated trailer brake controller diagnostics (where equipped)
• Brake hydraulic system repairs

Electrical & Wiring

• Complete factory wiring diagrams
• GM GMLAN communication network diagnostics
• Engine Control Module (ECM) diagnostics
• Transmission Control Module (TCM) diagnostics
• Body Control Module (BCM) diagnostics
• Glow plug control module diagnostics
• Charging and starting system repairs
• Dual battery system diagnostics (Duramax)
• Fuse, relay, and power distribution diagrams
• Instrument cluster servicing
• GM Tech 2 and GDS2 diagnostic procedures

Air Conditioning & HVAC

• Manual and automatic climate control systems
• Air conditioning compressor servicing
• Refrigerant recovery and recharge procedures
• HVAC control module diagnostics
• Heater core replacement
• Blend door actuator servicing
• Blower motor repairs

Body & Interior

• Power windows, locks, and mirrors
• Remote Keyless Entry (RKE)
• Tire Pressure Monitoring System (TPMS)
• Airbag (SIR) system diagnostics
• Driver Information Center servicing
• Seat adjustment and memory seat servicing (where equipped)
• Instrument panel removal and installation
• Interior trim repairs
• Pickup bed and tailgate servicing
• Exterior body repair procedures

Diagnostics & Troubleshooting

• GM Tech 2 and GDS2 diagnostic procedures
• Diagnostic Trouble Code (DTC) troubleshooting
• Allison transmission diagnostics
• Duramax injector balance rate testing
• Diesel particulate filter regeneration procedures
• Module programming and configuration
• Electrical troubleshooting procedures
• Factory preventive maintenance schedules
• Complete service specifications

Common Error Codes Covered

This manual provides diagnostic and repair procedures for common GM Diagnostic Trouble Codes (DTCs), including:

Engine Codes

• P0087 – Fuel Rail Pressure Too Low
• P0101 – Mass Air Flow Sensor Performance
• P0299 – Turbocharger Underboost Condition
• P0401 – Exhaust Gas Recirculation Flow Insufficient
• P0671 – Glow Plug Cylinder 1 Circuit
• P2463 – Diesel Particulate Filter Restriction – Soot Accumulation
• P2453 – Diesel Particulate Filter Pressure Sensor Performance
• P2563 – Turbocharger Boost Control Position Sensor Performance

Transmission & Drivetrain Codes

• P0700 – Transmission Control System Malfunction
• P0717 – Input Speed Sensor No Signal
• P0735 – Incorrect Fifth Gear Ratio
• P0842 – Transmission Fluid Pressure Sensor Circuit Low
• C0327 – Transfer Case Encoder Circuit Fault

ABS & Chassis Codes

• C0035 – Left Front Wheel Speed Sensor Circuit
• C0040 – Right Front Wheel Speed Sensor Circuit
• C0561 – System Disabled Information Stored
• C0710 – Steering Position Signal Fault

Body & Electrical Codes

• B1325 – Control Module System Voltage Low
• B1370 – Ignition Accessory Circuit Fault
• U0100 – Lost Communication With ECM/PCM
• U0140 – Lost Communication With Body Control Module

The manual also includes hundreds of additional GM-specific diagnostic trouble codes, electrical wiring diagrams, troubleshooting flowcharts, module programming procedures, Allison transmission diagnostics, Duramax diesel testing procedures, and factory repair specifications.

Who Is This Manual For?

• Chevrolet dealership technicians
• Independent repair workshops
• Fleet maintenance professionals
• Heavy-duty truck technicians
• Chevrolet Silverado 2500HD owners
• Experienced DIY mechanics

If you are servicing, maintaining, diagnosing, or repairing a 2008 Chevrolet Silverado 2500HD, this factory workshop manual provides the complete procedures and technical information required to perform repairs to GM factory standards.