Model Generation:
GMT900 (2007-2013) and continuation of GMT800 platform for 2004-2006
Platform Code Early Years:
GMT800 (Silverado-based platform)
Platform Code Later Years:
GMT900 (new platform for 2007+)
Segment:
Full-size pickup truck
Target Audience:
Individuals and businesses requiring a robust and capable workhorse or personal transportation.
Key Competitors:
Ford F-150, Dodge Ram 1500, Toyota Tundra, Nissan Titan.
Vehicle Strengths:
Durability, towing capacity, available V8 engines, comfortable ride for a truck, extensive customization options.
Manual Benefits:
Empowers owners to perform basic maintenance, understand vehicle features, and potentially save on repair costs. Provides step-by-step instructions and diagrams.
Primary Coverage:
Complete Owner's Manual
Secondary Coverage:
Maintenance, Specifications, Driving, Safety, Climate, Entertainment, Locks, Security, Lights, Driver Controls
Estimated Page Count:
Varies by specific model year and configuration, typically 300-500 pages for comprehensive manuals.
Powertrain:
Engine oil, fuel information, air filter, refill capacities, lubricant specifications (engine, transmission, differential).
Chassis:
Brake system, steering system, suspension system (general operation and fluid checks).
Electrical:
Instrument cluster indicators, lighting controls, battery maintenance, basic fuse information.
Interior:
Climate controls, entertainment systems, seating adjustments, seatbelt operation, lock and security features.
Body:
Door locks, windows, mirrors, basic cleaning procedures.
Basic Maintenance:
Checking engine oil, coolant, windshield washer fluid, tire pressure. Air filter replacement guidance.
Owner Operations:
Starting and operating the vehicle, using climate control, operating infotainment system, adjusting seats and mirrors, using safety restraints.
Troubleshooting:
Interpretation of dashboard warning lights and messages.
Safety Information:
Seat belt usage, child seat installation, airbag system warnings, reporting safety defects (U.S. only).
Depth:
Owner-level information for operation, basic checks, and routine maintenance. Does not include detailed diagnostic procedures or complete repair instructions typical of a service manual.
Engine Options 2004-2006:
4.3L V6 (LU3), 4.8L V8 (LR4), 5.3L V8 (LM7), 6.0L V8 (LQ4 - Heavy Duty/SS)
Engine Options 2007-2009:
4.3L V6 (LU3), 4.8L V8 (L20), 5.3L V8 (LY5/LC9), 6.0L V8 (L76/LFA), 6.2L V8 (L92/L94)
Horsepower Range:
Approximately 195 hp (4.3L V6) to 403 hp (6.2L V8)
Torque Range:
Approximately 260 lb-ft (4.3L V6) to 417 lb-ft (6.2L V8)
Fuel Delivery:
Multi-port Fuel Injection (MPFI) or similar electronic fuel injection systems.
Fuel Type:
Unleaded gasoline, with some engines potentially supporting E85 FlexFuel (LC9).
Oil Type Recommendation:
Typically SAE 5W-30 synthetic blend or full synthetic, depending on engine and climate. Refer to manual for exact specification.
Air Filter Part Numbers:
Varies by engine and model year. Examples include ACDelco A1802C, Wix WA10114, Fram CA9970. Exact part number is crucial and found in manual/parts catalog.
Standard Transmission:
Most models came standard with automatic transmissions. Manual transmissions were less common, particularly in later years and higher trims.
Optional Transmission:
4-speed automatic (4L60E/4L65E, 4L70E), 6-speed automatic (6L80E, 6L90E for later models/HD).
Transmission Modes:
Driverselectable modes (e.g., Tow/Haul mode) often available to optimize shift points for heavy loads.
Transmission Fluid Type:
Dexron-VI (for 2006+ models with 6L80E/6L90E) or Dexron-III/VI compatible fluids for earlier 4-speed automatics. Always verify with manual/dealer.
Body Styles:
Regular Cab, Extended Cab (Double Cab), Crew Cab.
Bed Lengths:
Short Bed (approx. 69.3 inches), Standard Bed (approx. 78.9 inches), Long Bed (approx. 97.6 inches).
Wheelbase:
Varies by cab and bed configuration, ranging from approximately 119 inches to 167 inches.
Curb Weight:
Varies significantly based on configuration, generally from 4,500 lbs to 5,500+ lbs.
Towing Capacity:
Up to 10,500+ lbs depending on configuration, engine, rear axle ratio, and towing package.
Payload Capacity:
Varies, typically 1,500 lbs to 3,000+ lbs.
NHTSA Front Crash Test Rating:
Generally 4-star or 5-star for front impact protection (varies by year and specific test).
IIHS Crash Test Rating:
Good to Acceptable ratings in various categories, depending on year and specific test (e.g., frontal offset, side impact).
ABS:
Standard Anti-lock Braking System (ABS).
Traction Control:
Available Traction Control System (TCS) and StabiliTrak electronic stability control (especially on later models).
Airbags:
Frontal airbags for driver and passenger. Available side-impact airbags (curtain or seat-mounted) on certain trims/configurations.
Seat Belts:
Three-point seat belts for all occupants, with pretensioners and load limiters for front seats.
Audio Systems:
Base AM/FM radio, optional CD player, optional Bose premium audio systems. Availability of auxiliary input or satellite radio varies by trim and year.
Navigation:
Optional factory navigation systems were available on higher trims, typically integrated into a touchscreen display on 2007+ models.
Parking Assist:
Available rear parking assist sensors on some trims.
Cruise Control:
Standard cruise control.
Onstar:
Available OnStar telematics system (subscription-based) for emergency services, vehicle diagnostics, and turn-by-turn navigation.
Climate Control:
Manual climate control or available dual-zone automatic climate control.
Oil Change Interval:
Typically every 7,500 to 10,000 miles with synthetic oil, or as indicated by the vehicle's oil life monitoring system. Refer to manual for specific interval based on driving conditions.
Tire Rotation:
Recommended every 7,500 miles or with every oil change.
Transmission Fluid Change:
Variable. Recommended every 50,000-100,000 miles, or more frequently under severe towing conditions. Consult manual or service advisor.
Coolant Type:
Typically a silicate-free, extended-life engine coolant (e.g., Dex-Cool, G-05, or equivalent). Manual will specify exact type and color.
Brake Fluid Type:
DOT 3 or DOT 4 (check manual for specific type).
Differential Fluid Type:
Varies by rear axle type (e.g., Spicer, Eaton G80 locker). Typically SAE 75W-90 or 75W-140 synthetic gear oil. May require friction modifier for limited-slip differentials.
Common Wear Items:
Ball joints, tie rod ends, sway bar links, brake pads/rotors, exhaust components, fuel pump (especially on earlier models).
Engine Specific Concerns:
Possible intake manifold gasket leaks (4.8L/5.3L V8s), AFM/DOD lifter issues (on engines with this feature), oil pressure sensor failures.
Transmission Concerns:
Some 4-speed automatic transmissions (4L60E family) can experience torque converter shudder or solenoid issues. Later 6-speeds are generally more robust.
Gm Truck Legacy:
GMC has a long history of producing trucks, often positioned as a professional-grade brand by General Motors, focusing on capability and durability.
Platform Transition:
This period marks a significant transition. 2004-2006 models are based on the GMT800 platform (shared with Silverado), while 2007-2009 models are part of the redesigned GMT900 generation, offering a more refined exterior and interior.
Manufacturing Locations:
Primarily produced in North America (e.g., Fort Wayne, Indiana; Silao, Mexico).
Motor Trend Truck Of The Year:
The Chevrolet Silverado (platform sibling) won MotorTrend Truck of the Year in 2007, indicating the platform's strong capabilities.
Konsumen Reports Reliability:
Reliability ratings varied by year and powertrain. Some years/configurations received average to above-average ratings, while others faced common GM truck issues.
Emissions Certification:
Meets EPA and California Air Resources Board (CARB) emissions standards for the respective model years.
