🏷️ Basic Information Identification Make: GMC Model: Sierra Model Years Covered: 2008, 2009, 2010 Generation Generation: Third Generation (GMT900) 👋 Introduction Market Position Vehicle Segment: Full-size Pickup Truck Gmc Positioning: GMC Sierra is positioned as a premium, professional-grade truck, often competing with Ford F-150 and Ram 1500 series. It emphasizes capability, durability, and refinement. Competitive Analysis Competitors 2008-2010: Ford F-150, Ram 1500, Chevrolet Silverado 1500 (shares platform with Silverado), Toyota Tundra, Nissan Titan Key Features Manual Features: Detailed substeps, notes/cautions/warnings, numbered instructions, bold figure numbers, detailed illustrations/drawings/photos, enlarged inset views, easy-to-use table of contents, combined troubleshooting/electrical service with wiring diagrams. Manual Purpose Target Audience: Do-it-yourselfers and experienced mechanics alike. 📋 Manual Details Coverage Areas Primary Coverage: Service and Repair Secondary Coverage: Maintenance, Diagnostics, Troubleshooting Page Count Estimated Page Count: Extensive (typical service manuals for this era are several thousand pages) Manual Type Type: Factory Service Manual (FSM) / Repair Manual Language Language: English Format Format: PDF (Downloadable) 📖 Manual Coverage Systems Covered Powertrain: Engine, Fuel System, Exhaust System, Cooling System, Lubrication System, Ignition System, Starting System, Charging System, Automatic Transmission, Manual Transmission, Transfer Case, Drivetrain Components (Propeller Shaft, Driveshaft, Differential, Axles) Chassis: Suspension System (Front and Rear), Steering System (Power Steering), Brake System (Hydraulic, Parking Brake), Wheels and Tires Electrical: Electrical System (Wiring Diagrams, Power Distribution), Lighting, Instrumentation, Audio/Visual Systems, Horn, Wiper/Washer System, Power Accessories (Windows, Locks), Cruise Control, Engine Immobilizer, Multiplex/CAN Communication Body: Body Exterior (Hood, Doors, Glass, Mirrors), Body Interior (Seats, Instrument Panel, Trim), Air Conditioning System, Supplemental Restraint System (SRS - Airbags), Seat Belts Procedures Included Maintenance: Scheduled Maintenance, Fluid Changes, Filter Replacements, Inspections Repair: Component Disassembly, Reassembly, Replacement, Adjustments, Torque Specifications Diagnostics: Troubleshooting Guides, Symptom-Based Diagnostics, Diagnostic Trouble Codes (DTCs) Electrical Service: Wiring Diagrams, Component Location, Circuit Testing, Power and Ground Distribution Technical Depth Depth: Comprehensive (covers everything from basic maintenance to complete engine and transmission rebuilds, including detailed diagnostic procedures and wiring schematics) 📊 Manual Specifications File Format Compatibility: All PC-based Windows, Mac, and Linux operating systems Portability: Can be saved to hard-drive, burned to CD-ROM Print Quality Printable: Yes (all pages are printable) Binding Type Binding Type: Digital (PDF format, no physical binding) Paper Type Paper Type: N/A (digital format) ⚙️ Engine Specifications Primary Engine Engine Options: Multiple V8 engines were available, including 4.8L, 5.3L, 6.0L, and 6.2L Vortec V8s. Some models also offered a 4.3L V6. Performance Torque Focus: Vortec V8s are known for strong low-end torque, beneficial for towing and hauling. Fuel System Fuel Delivery: Multi-port Fuel Injection (MPFI) Engine Management ECU: ECM (Engine Control Module) with diagnostic capabilities 🔧 Transmission Standard Transmission Automatic: 4-speed automatic (e.g., 4L60E) and 6-speed automatic (e.g., 6L80E, 6L90E) were common. Optional Transmission Manual: Manual transmissions were available on some configurations, though less common in higher trims. Features Towing Enhancements: Available tow/haul mode to optimize transmission shift points for towing. 📐 Dimensions Exterior Body Styles: Regular Cab, Extended Cab (Double Cab), Crew Cab Bed Lengths: Short Bed, Standard Bed, Long Bed (varies by cab configuration) Weights Gvw: Gross Vehicle Weight ratings varied significantly based on configuration, typically ranging from 7,000 lbs to over 9,000 lbs for heavy-duty variants. 🛡️ Safety Features Ratings NHTSA Front Impact: Typically 4 or 5 stars for front impact safety for the driver and passenger. NHTSA Side Impact: Generally good ratings for side impact, often 4 or 5 stars. Active Features ABS: Standard Anti-lock Braking System (ABS). Traction Control: Available StabiliTrak electronic stability control and traction control. Passive Features Airbags: Frontal airbags for driver and passenger, available side-impact airbags and curtain airbags. Seatbelts: Three-point seatbelts with pretensioners. 💡 Technology Features Infotainment Infotainment System: Available premium audio systems, navigation (optional), and integrated entertainment features depending on trim level. The manual covers the electrical systems related to these. Driver Assistance Driver Aids: Parking assist (rear park assist), backup camera (optional). Connectivity Bluetooth: Available Bluetooth hands-free phone system. Engine Tech Afm: Active Fuel Management (AFM) system in some V8 engines, designed to improve fuel economy by deactivating cylinders under light load. The manual details its operation and potential issues. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000 to 7,500 miles or 6 months, depending on driving conditions and oil type. GM's Oil Life Monitoring System (OLMS) provides more dynamic recommendations. Transmission Fluid Change: Recommended at approximately 50,000 to 100,000 miles, often specified as 'lifetime' but regular changes are advisable for longevity. Fluid Specifications Engine Oil: Typically SAE 5W-30 synthetic or synthetic blend, meeting GM dexos specification (though dexos was introduced later, the manual will specify appropriate GM standards for the era). Coolant: GM Dex-Cool (50/50 mix of P-OAT coolant and distilled water) or equivalent orange-colored extended-life coolant. Transmission Fluid: Dexron-VI for 6-speed automatics, Dexron-III or equivalent for 4-speed automatics. Known Issues Engine Lifter Tick: Some Vortec engines, particularly the 5.3L, have been known to...