Vehicle Segment:
Heavy-Duty Pickup Truck
Target Audience:
Commercial users, fleet operators, individuals requiring heavy towing and hauling capability.
Key Competitors:
Ford F-250 Super Duty, Ram 2500 (Dodge Ram).
Vehicle Strengths:
Robust chassis, powerful engine options, high towing and payload capacity, durability.
Manual Value Proposition:
Provides access to official factory repair procedures and specifications, crucial for accurate maintenance and repair.
Engine:
Detailed diagnostics, repair procedures, component testing for all gasoline and diesel engines.
Transmission:
Repair and overhaul for automatic and manual transmissions, including fluid service and torque converter.
Drivetrain:
Front axle, rear axle, driveshafts, differentials, hub assemblies, 4WD system.
Suspension:
Front and rear suspension systems, steering components, alignment procedures.
Brakes:
Front and rear brake systems (disc/drum), ABS, traction control, parking brake.
Electrical:
Complete wiring diagrams, fuse box layouts, component testing, starter, alternator, battery.
HVAC:
Heating, ventilation, and air conditioning system diagnosis and repair.
Fuel System:
Fuel pump, injectors, lines, evaporative emissions control (EVAP).
Cooling System:
Radiator, water pump, thermostat, cooling fan, coolant specifications.
Exhaust System:
Catalytic converter, mufflers, pipes, oxygen sensors.
Body And Frame:
Exterior and interior trim, doors, windows, seats, chassis components, corrosion protection.
Interior:
Dashboard, instrument panel, upholstery, comfort controls.
Lighting:
Headlights, taillights, interior lighting, bulb types.
Safety Systems:
Airbag system, seat belts, child seat anchors.
Preventive Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks.
Troubleshooting:
Diagnostic charts, symptom-based troubleshooting guides, common fault codes.
Repair Procedures:
Step-by-step instructions for component removal, installation, and adjustment.
Diagnostic Procedures:
ECM diagnosis, sensor testing, actuator control, using scan tools.
Specifications:
Torque specifications, clearances, fluid capacities, electrical values.
Component Replacement:
Detailed guides for replacing major and minor components.
Rebuilding Procedures:
Where applicable, instructions for rebuilding components like engines or transmissions.
Depth Of Coverage:
Factory-level detail, suitable for professional technicians and advanced DIY enthusiasts.
Diagnostic Tools:
References diagnostic trouble codes (DTCs) and recommends appropriate diagnostic equipment.
Wiring Diagrams:
Comprehensive, sectioned wiring diagrams with component locations and circuit descriptions.
Gasoline Engine:
6.0L V8 Vortec (RPO L96)
Gasoline Engine Details:
Displacement: 6.0L (366 ci); Bore x Stroke: 4.00 in x 3.62 in; Compression Ratio: 9.1:1; Horsepower: 360 hp @ 5400 rpm; Torque: 380 lb-ft @ 4200 rpm.
Diesel Engine:
6.6L V8 Duramax Turbo-Diesel (RPO LMM)
Diesel Engine Details:
Displacement: 6.6L (403 ci); Bore x Stroke: 4.02 in x 3.89 in; Compression Ratio: 16.0:1; Horsepower: 365 hp @ 3200 rpm; Torque: 725 lb-ft @ 1600 rpm.
Engine Management:
GM Electronic Throttle Control (ETC), sophisticated ECU.
Gasoline Fuel System:
Multi-port Fuel Injection (MPFI).
Diesel Fuel System:
Common Rail Direct Injection (CRDI), high-pressure fuel pump, Denso injectors.
Cooling Capacity:
Approximately 20-22 quarts for gasoline, 24-26 quarts for diesel, depending on configuration.
Wheelbase Regular Cab:
133.6 inches
Wheelbase Extended Cab:
143.5 inches
Wheelbase Crew Cab:
153.0 inches
Bed Length:
6.5 ft (Standard Bed), 8.0 ft (Long Bed)
Curb Weight:
Varies significantly by configuration, typically 6,000 - 7,500 lbs.
Gvwr:
9,000 - 11,000 lbs depending on configuration.
Max Towing Capacity:
Up to 16,700 lbs (with appropriate hitch and configuration).
Max Payload Capacity:
Up to 4,500 lbs (depending on configuration).
NHTSA Frontal Crash Test Driver:
5 Stars (for applicable configurations)
NHTSA Frontal Crash Test Passenger:
5 Stars (for applicable configurations)
NHTSA Side Impact Crash Test Front Seat Passenger:
5 Stars (for applicable configurations)
NHTSA Side Impact Crash Test Rear Seat Passenger:
4 Stars (for applicable configurations)
ABS:
Standard Anti-lock Braking System (ABS).
Traction Control:
Available StabiliTrak stability control with integrated trailer sway control.
Airbags:
Front airbags for driver and passenger; available side-curtain airbags.
Seat Belts:
Front seat pretensioners, three-point rear seat belts.
Oil Change Interval Gasoline:
Every 7,500 miles or 6 months, whichever comes first (using synthetic blend oil).
Oil Change Interval Diesel:
Every 5,000 - 7,500 miles or 6 months, depending on usage and oil quality (refer to manual for specific LMM recommendations).
Transmission Fluid Change:
Every 45,000 - 60,000 miles under normal use; more frequent for heavy towing/hauling.
Coolant Flush:
Every 100,000 miles or 5 years for Dex-Cool coolant (for gasoline engines).
Engine Oil Gasoline:
SAE 5W-30 (API SN or higher, GM dexos1 approved is recommended for later models but check for 2008 spec).
Engine Oil Diesel:
API CJ-4 or CK-4, SAE 15W-40 (conventional or synthetic).
Brake Fluid:
DOT 3 (GM P/N 12378310 or equivalent).
Power Steering Fluid:
GM P/N 89021184 or equivalent, Dexron VI compatible.
Duramax Lmm Common Problems:
Potential for injector issues, EGR system concerns, glow plug problems, DPF regeneration issues (though DPF was less common in 2008 compared to later years).
Vortec 6.0L Common Problems:
Intake manifold gasket leaks, AFM lifter issues (less common in 2008 HD models compared to 1500 series), occasional transmission solenoid issues.
Durability Concerns:
Regular maintenance is critical for longevity, especially for the diesel engine components and exhaust aftertreatment systems.