🏷️ Basic Information Identification Make: GMC Model: Sierra Year: 2004 Generation Generation Code: GMT800 (Second Generation) Codes Platform Code: GMT800 👋 Introduction Market Position Market Position: Full-size pickup truck designed for work, towing, and personal use. Competed with Ford F-150, Dodge Ram, and Toyota Tundra. Competitive Analysis Competitive Analysis: The 2004 Sierra, as part of the GMT800 platform, was known for its comfortable ride (especially for a truck of its era), powerful V8 engine options, and relatively modern interior for its time. GMC positioned itself as the 'Professional Grade' truck. Key Features Key Features: Robust GMT800 platform, wide range of engine and drivetrain configurations, available Denali trim with enhanced luxury and performance, spacious cabin, and proven durability. 📋 Manual Details Coverage Areas Coverage Areas: Introduction, Instrument Cluster, Entertainment Systems, Climate Controls, Lights, Driver Controls, Locks and Security, Seating and Safety Restraints, Driving, Customer Assistance, Reporting Safety Defects (U.S. only), Cleaning, Maintenance and Specifications, Engine Compartment, Engine Oil, Battery, Fuel Information, Air Filter(s), Part Numbers, Refill Capacities, Lubricant Specifications, Accessories Page Count Page Count: Unknown (PDF download, actual page count varies by specific factory manual revision) Manual Type Manual Type: Owner's Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Systems Covered: Instrument Panel and Gauges, Audio System Operation, Climate Control Systems (HVAC), Exterior and Interior Lighting Functions, Power Windows and Mirrors, Door Locks and Remote Keyless Entry, Seat Adjustments, Airbag Systems, Seatbelt Operation and Care, Starting and Operating the Vehicle, Towing Information, Routine Inspections, Fluid Levels and Types, Battery Maintenance, Fuel System Basics, Air Intake System, Lubrication Requirements, Accessory Installation Guidelines Procedures Included Procedures Included: Locating and identifying dashboard indicators, Operating the radio and sound system, Adjusting temperature and fan speed, Using headlights, taillights, and interior lights, Adjusting power seats and mirrors, Using the keyless entry system, Fastening and adjusting seatbelts, Understanding airbag deployment, Proper starting and driving techniques, Checking and topping off engine oil, coolant, brake fluid, and windshield washer fluid, Battery jump-starting and maintenance, Identifying correct fuel grade, Replacing the engine air filter, Understanding refill capacities for all fluids, Identifying recommended lubricants Technical Depth Technical Depth: Owner-level information for operation, basic maintenance, fluid checks, and safety features. Does not include detailed diagnostic procedures or component-level repair instructions typically found in a Service Manual. 📊 Manual Specifications File Format File Format: PDF Print Quality Print Quality: Digital Replica of Original Factory Manual (quality dependent on original scan/source) Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Primary Engine: 4.8L Vortec 5000 V8 Performance 4.8L V8 Horsepower: Approximately 285 hp @ 5200 rpm 4.8L V8 Torque: Approximately 295 lb-ft @ 4000 rpm Fuel System Fuel System: Sequential Fuel Injection (SFI) Engine Options Engine Options: 4.8L Vortec V8, 5.3L Vortec 5300 V8, 6.0L Vortec 6000 V8 (Denali) Engine Codes Engine Codes: LM7 (5.3L), LQ4 (6.0L), LV3 (4.8L) 🔧 Transmission Standard Transmission Standard: 4-Speed Automatic (4L60-E) Optional Transmission Optional: 4-Speed Automatic (4L80-E for heavy-duty applications or specific trims) Features Transmission Features: Electronically controlled overdrive, Tow/Haul mode 📐 Dimensions Exterior Wheelbase Std: 143.5 inches (Standard Cab 8ft Bed) Wheelbase Ext: 153.0 inches (Extended Cab 6.5ft Bed) Bed Length Short: 6.5 feet Bed Length Long: 8.0 feet Weights Curb Weight Approx: 4,600 - 5,200 lbs (Varies by configuration) Towing Capacity Max: Up to 10,000+ lbs (with proper equipment and configuration) 🛡️ Safety Features Ratings NHTSA Driver Front Test Result 2004: 5-Star NHTSA Passenger Front Test Result 2004: 5-Star IIHS Frontal Offset Test Rating 2004: Good Active Features Active Safety Features: Anti-lock Braking System (ABS), Available Traction Control Passive Features Passive Safety Features: Driver and front passenger airbags, Available side-impact airbags (on certain models/trims), Seatbelt pretensioners 💡 Technology Features Infotainment Infotainment System: Standard AM/FM stereo with CD player and cassette tape. Available Bose premium audio system. OnStar telematics system available on certain trims/packages. Driver Assistance Driver Assistance Features: Limited by modern standards. Primarily ABS, with available traction control on some models. No advanced driver-assistance systems (ADAS). Connectivity Connectivity Features: Basic connectivity via audio system. OnStar provides emergency and vehicle assistance services through cellular and GPS technology. Instrument Cluster Instrument Cluster Details: Includes speedometer, tachometer, fuel gauge, engine temperature gauge, oil pressure gauge, voltmeter, and various warning lights for critical systems (e.g., check engine, ABS, airbag). 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000-7,500 miles or 6 months, depending on driving conditions and oil type specified in the manual. Tire Rotation Interval: Every 5,000-7,500 miles Engine Air Filter Replacement: 15,000-30,000 miles or as needed based on inspection Fluid Specifications Engine Oil Specification: API Certified SAE 5W-30 Synthetic (or as specified for specific engine variant, e.g., Dexos is not applicable for this year) Coolant Specification: GM Engine Coolant (Green) or equivalent, typically a 50/50 mix of antifreeze and distilled water. Transmission Fluid...