🏷️ Basic Information Identification Make: Chevrolet Model: Avalanche 2500 Year: 2004 Codes Platform: GMT820 (GMT800 platform derivative) 👋 Introduction Market Position Segment: Full-size pickup truck/SUV hybrid (Sport Utility Truck - SUT). Competitive Analysis Competitors: Ford F-150 SuperCrew, Dodge Ram 1500 Quad Cab, Toyota Tundra Double Cab, Cadillac Escalade EXT. Key Features Unique Selling Proposition: Innovative Midgate (pass-through between cabin and bed), versatile cargo bed, robust heavy-duty capability of the 2500 series, towing and hauling prowess. 📋 Manual Details Coverage Areas Primary Coverage: 2004 Chevrolet Avalanche 2500 Secondary Coverage: Mechanically similar components on other GMT800 platform vehicles (e.g., Silverado, Suburban, Tahoe) where applicable, though specific body and features may differ. Page Count Estimated Pages: Thousands (comprehensive digital format) Manual Type Type: Service and Repair Manual Software Language Language: English Format Format: PDF Download (digital access) 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, cooling, fuel delivery, ignition, emissions, exhaust, transmission (automatic), transfer case (4WD models), driveline components (axles, driveshafts, CV joints). Chassis: Suspension (front and rear), steering system, brake system (ABS, hydraulic, parking brake), wheels and tires. Electrical: Battery, charging system, starting system, lighting, instrumentation, power windows, power locks, mirrors, seats, wipers, horns, body control modules, chassis control modules, powertrain control modules (PCM). HVAC: Heating, ventilation, and air conditioning system components, operation, and repair. Body: Exterior body panels, interior trim, doors, tailgate, Midgate, bumpers, glass, seats, restraints (airbags, seatbelts). Procedures Included Maintenance: Scheduled maintenance, fluid changes, filter replacements, lubrication, inspection procedures. Repair: Step-by-step repair procedures for all major vehicle systems, including component removal, installation, and adjustment. Diagnostics: Diagnostic trouble codes (DTCs), troubleshooting flowcharts, symptom-based diagnostics, electrical testing procedures, component testing. Specifications: Torque specifications, clearances, fluid capacities, electrical specifications, pressure readings. Technical Depth Depth: Comprehensive: covers everything from basic maintenance to complete engine and transmission overhauls, complex electrical diagnostics, and body repairs. 📊 Manual Specifications File Format Digital Format: PDF Download Print Quality Printability: High-resolution, printable pages for offline use. Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: LM7 (common for 5.3L V8), L59 (for E85 compatible 5.3L V8), LQ4 (common for 6.0L V8), LQ9 (performance 6.0L V8) Displacement: Typically 5.3L (323 cu in) or 6.0L (366 cu in) V8 Vortec engines. Performance Horsepower 5 3L: Approx. 295 hp @ 5200 rpm (LM7/L59) Torque 5 3L: Approx. 335 lb-ft @ 4000 rpm (LM7/L59) Horsepower 6 0L: Approx. 300 hp @ 4400 rpm (LQ4), Approx. 325 hp @ 5200 rpm (LQ9) Torque 6 0L: Approx. 370 lb-ft @ 3200 rpm (LQ4), Approx. 370 lb-ft @ 4000 rpm (LQ9) Fuel System Fuel Injection: Sequential Fuel Injection (SFI), Returnless Fuel System. Engine Type Configuration: Vortec V8, Overhead Valve (OHV), Cast Iron Block, Aluminum Cylinder Heads. 🔧 Transmission Standard Transmission Type: 4-speed automatic (4L65E for 5.3L, 4L80E for 6.0L). Optional Optional Transmission: N/A (4-speed automatic was standard for 2500 model). Features Transmission Features: Electronic transmission control, Tow/Haul mode, Engine braking capability. Drivetrain Drivetrain Options: Rear-Wheel Drive (RWD) or Full-Time All-Wheel Drive (StabiliTrak, Autotrac 4WD). 📐 Dimensions Exterior Length: Approx. 227.5 inches Width: Approx. 79.7 inches Height: Approx. 75.9 inches Wheelbase: Approx. 143.5 inches Weights Curb Weight: Approx. 5,800 - 6,200 lbs (varies by configuration) Gross Vehicle Weight Rating Gvw: Approx. 8,600 lbs Cargo Bed Length With Midgate Closed: Approx. 50.6 inches Bed Length With Midgate Open: Approx. 97.1 inches 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star Driver, 5-Star Passenger (for model year 2004) NHTSA Side Impact: 4-Star Front Passenger, 4-Star Rear Passenger (for model year 2004) Active Features Traction Control: Available StabiliTrak (integrated with ABS/TCS) ABS: Standard Anti-lock Braking System (ABS) Passive Features Airbags: Driver and front passenger airbags, available side-impact airbags. Seatbelts: 3-point seat belts for all occupants, integrated head restraints. 💡 Technology Features Infotainment Audio System: Available AM/FM stereo with CD player, optional Bose premium sound system, steering wheel mounted audio controls. Navigation: Optional factory-installed navigation system. Driver Assistance Parking Assist: Optional rear parking assist sensors. Connectivity Onstar: Available OnStar in-vehicle safety and communication system. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000-7,500 miles or 6 months, depending on oil type and driving conditions (refer to owner's manual for precise recommendations). Tire Rotation: Recommended every 5,000-7,500 miles. Coolant Flush: Every 60,000 miles or 5 years for Dex-Cool coolant. Fluid Specifications Engine Oil Type: SAE 5W-30 (Synthetic recommended for better performance and protection). Engine Oil Capacity: Approx. 6 quarts (323 cu in 5.3L), Approx. 7 quarts (366 cu in 6.0L). Transmission Fluid Type: Dexron-III (or Dexron-VI if available and compatible) Automatic Transmission Fluid (ATF). Coolant Type: GM P/N 12346993 (Orange) or equivalent (Dex-Cool compatible Extended Life). Known Issues Common Wear Items: Ball joints, tie rod ends, wheel bearings, catalytic converters, fuel pump modules, ABS sensors, transmission cooler lines. Engine Oil Consumption: Some Vortec V8 engines can exhibit increased oil consumption...