🏷️ Basic Information Identification Make: GMC Model: Sierra 3500 Year: 2005 Codes Platform: GMT880 👋 Introduction Market Position Target Audience: DIY Enthusiasts, Professional Technicians, Fleet Maintenance Competitive Analysis Advantage: Licensed OE data, instant online access, comprehensive coverage, cost-effective compared to printed manuals. Key Features Feature 1: Factory-licensed information ensures accuracy and completeness. Feature 2: Intuitive navigation and search functionality for quick information retrieval. Feature 3: Compatible with PCs, laptops, smartphones, and tablets. Feature 4: Annual subscription provides continuous access to updated information. 📋 Manual Details Coverage Areas Primary Coverage: Full Service and Repair Secondary Coverage: Maintenance, Diagnostics, Troubleshooting, Wiring Diagrams, Component Specifications Page Count Estimated Pages: 1500+ Manual Type Type: Service and Repair Manual Software Language Language: English Format Format: Online Access (Web Browser Compatible) 📖 Manual Coverage Systems Covered Engine: All Gasoline and Diesel Engines Transmission: Automatic and Manual Transmissions Drivetrain: Front Axle, Rear Axle, Transfer Case, Drive Shafts Suspension: Front and Rear Suspension Components, Steering Components Brakes: Front and Rear Brakes, ABS System Electrical: Charging System, Starting System, Ignition System, Lighting, Instrumentation, Body Control Modules, Power Accessories HVAC: Heating, Ventilation, and Air Conditioning Systems Body: Exterior and Interior Body Panels, Doors, Glass, Seats Chassis: Frame, Body Mounts, Fuel System, Exhaust System Procedures Included Maintenance: Oil Change, Filter Replacement, Fluid Checks and Top-offs, Tire Rotation, Brake Inspections Repair: Engine Component Replacement, Transmission Overhaul, Brake System Repair, Suspension Component Replacement, Electrical Component Diagnosis and Replacement Diagnostics: Troubleshooting Guides, Diagnostic Trouble Codes (DTCs), Symptom-Based Diagnostics Wiring Diagrams: Complete Electrical Schematics for All Systems Technical Depth Depth: Factory-Level Diagnostic and Repair Procedures, Component Specifications, Torque Values, Special Tool Requirements 📊 Manual Specifications File Format Access Method: Web-based, accessible via any modern web browser Print Quality Printability: Information is generally not designed for extensive printing; focus is on digital access. Binding Type Binding: N/A (Software) Paper Type Paper Quality: N/A (Software) ⚙️ Engine Specifications Primary Engine Engine 1 Description: 6.0L Vortec V8 (LQ4/LQ7) Engine 1 Horsepower: 300-325 hp (approx.) Engine 1 Torque: 360-370 lb-ft (approx.) Engine 1 Fuel System: Sequential Electronic Fuel Injection (SFI) Engine 2 Description: 8.1L Vortec V8 (L18) Engine 2 Horsepower: 325 hp (approx.) Engine 2 Torque: 450-455 lb-ft (approx.) Engine 2 Fuel System: Sequential Electronic Fuel Injection (SFI) Engine 3 Description: 6.6L Duramax Diesel V8 (LLY) Engine 3 Horsepower: 310 hp (approx.) Engine 3 Torque: 590 lb-ft (approx.) Engine 3 Fuel System: Direct Injection (Common Rail) Performance Engine Cooling System: Pressurized, coolant-filled, with electric cooling fan(s) Emission Controls: Catalytic Converter, EGR (Diesel), Secondary Air Injection (some gasoline) 🔧 Transmission Standard Transmission Std Type: Allison 1000 5-Speed Automatic (Diesel) Optional Transmission Opt Type Gas: 4L80-E 4-Speed Automatic (Gasoline) Transmission Opt Type Diesel: NV4500 5-Speed Manual (Rare on 3500) Features Transmission Fluid Diesel: Dexron VI (Allison 1000) Transmission Fluid Gas: Dexron III (4L80-E) 📐 Dimensions Exterior Wheelbase Regular Cab: 133.0 inches Wheelbase Extended Cab: 143.5 inches Wheelbase Crew Cab: 153.0 inches Weights Gvwr Max: Up to 11,400 lbs (depending on configuration) Curb Weight Estimate: 5,500 - 7,000 lbs (depending on configuration) Cargo Bed Lengths: 6.5 ft (Standard Box), 8.0 ft (Long Box) 🛡️ Safety Features Ratings NHTSA Front Impact: 5 Star (Driver & Passenger) NHTSA Side Impact: 5 Star (Front), 4 Star (Rear) Active Features ABS: Standard Four-Wheel Anti-lock Braking System (ABS) Traction Control: Available (StabiliTrak on some models) Passive Features Airbags: Driver and Passenger Frontal Airbags Seatbelts: Height-adjustable front shoulder belts, pretensioners 💡 Technology Features Infotainment Infotainment System: Basic AM/FM Stereo with CD Player, Optional Bose Premium Audio System, Optional CD/MP3 Player. Driver Assistance Driver Assistance Features: ABS, available StabiliTrak electronic stability control. Connectivity Connectivity Options: Limited by modern standards; primarily focused on basic audio and optional OnStar integration. 🔧 Maintenance Service Intervals Oil Change Interval Gas: Every 3,000-5,000 miles or 6 months (severe use) / 7,500 miles or 12 months (normal use) Oil Change Interval Diesel: Every 5,000-7,500 miles or 6 months (severe use) / 10,000-15,000 miles or 12 months (normal use, synthetic oil recommended) Transmission Fluid Change Diesel: Every 45,000-100,000 miles (Allison 1000, depending on usage) Fluid Specifications Engine Oil Gas Spec: API SN/SP, SAE 5W-30 (or 10W-30 depending on temperature) Engine Oil Diesel Spec: API CJ-4 or CK-4, SAE 15W-40 (conventional) or 5W-40 (synthetic, recommended for cold weather) Coolant Spec: GM P/N 12346340 (Dex-Cool® Extended Life Coolant) or equivalent Orange silicate-free, phosphate-free, borate-free, nitrite-free, organic acid technology (OAT) based coolant. Known Issues Common Issue 1: Duramax Diesel Injector Issues (LB7 and LLY engines): Fuel leaks from injectors or injector harnesses can occur. Common Issue 2: Allison Transmission Longevity: While robust, regular fluid and filter changes are crucial, especially under heavy load. Common Issue 3: Front End Component Wear: Ball joints, tie rods, and wheel bearings can experience wear due to the heavy nature of the vehicle. Common Issue 4: Gauges and IPC Malfunctions: Some models may experience...