🏷️ Basic Information Identification Make: Chevrolet Model: Silverado 3500 HD Year: 2012 Codes Platform Code: GMT900 👋 Introduction Market Position Segment: Heavy-Duty Pickup Truck Target Audience: Commercial users, fleet managers, heavy trailer towers, DIY mechanics Competitive Analysis Key Competitors: Ford F-350 Super Duty, Ram 3500 Key Features Vehicle Strengths: Robust construction, powerful engine options (especially Duramax diesel), strong towing and payload capacities, reliable heavy-duty platform 📋 Manual Details Coverage Areas Engine Coverage: 6.0L V8 Vortec L96, 6.6L V8 Duramax Diesel LML Transmission Coverage: 6-speed Allison 1000 automatic (RWD & 4WD) Chassis Coverage: Frame, Suspension (Front Independent Torsion Bar, Rear Solid Axle with Leaf Springs), Steering (Hydraulic Power), Brakes (Front Disc/Rear Disc with ABS) Electrical Coverage: Wiring Diagrams, Fuses, Relays, Lighting, Powertrain Control Modules (PCM), Body Control Modules (BCM), Instrument Cluster, HVAC Controls, Infotainment System Body Coverage: Body Panels, Doors, Interior Trim, Glass, Bumpers, Towing Preparation Tire Pressure Monitoring System Tpms: TPMS sensor location, relearn procedures, and diagnostic information. Page Count Approximate Pages: Over 2000 (Comprehensive Guide) Manual Type Type: Factory Service Manual (FSM) Content Source: Derived from official factory service information. Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine Management: Engine diagnostics, fuel injection, ignition system, cooling system, lubrication system, emissions control Drivetrain: Transmission removal/installation, torque converter, transfer case (4WD models), driveshafts, axles Suspension Steering: Front torsion bar adjustment, rear leaf spring service, wheel bearing replacement, steering gear, power steering system Brakes: Brake system bleeding, caliper replacement, rotor replacement, ABS module diagnostics, parking brake Electrical Powertrain: ECM/PCM diagnostics, sensor testing, actuator testing, wiring harness repair Climate Control: HVAC system diagnosis, refrigerant handling, blower motor, A/C compressor, heater core Instrumentation Gauges: Operation, diagnostics, and repair of the instrument cluster and various gauges. Lighting Systems: Headlights, taillights, interior lighting, fog lamps, and their wiring. Procedures Included Routine Maintenance: Oil and filter change, air filter replacement, fuel filter replacement, spark plug replacement (gasoline), glow plug inspection/replacement (diesel), fluid level checks Troubleshooting: Diagnostic Trouble Codes (DTCs), symptom-based diagnostics, electrical circuit testing Component Replacement: Detailed step-by-step instructions for replacing major and minor components Rebuilding Procedures: Engine and transmission rebuilding procedures with specifications Alignment Specifications: Front and rear suspension alignment specifications and procedures. Technical Depth Depth: Comprehensive, from basic maintenance to complete engine and transmission overhauls Diagnostic Tools Required: Covers procedures requiring GM's Tech 2 or equivalent diagnostic scan tool for advanced diagnostics. 📊 Manual Specifications File Format Digital Format: PDF (Searchable, Printable) Indexing: Hyperlinked table of contents and index for easy navigation. Print Quality Image Quality: High-resolution images, diagrams, and schematics Binding Type Binding: N/A (Digital) Paper Type Paper Quality: N/A (Digital) ⚙️ Engine Specifications Primary Engine Gasoline Engine: 6.0L V8 Vortec L96 Diesel Engine: 6.6L V8 Duramax Diesel LML Performance L96 Horsepower L96: 360 hp @ 5400 rpm Torque L96: 380 lb-ft @ 4200 rpm Performance Lml Horsepower Lml: 397 hp @ 3000 rpm Torque Lml: 765 lb-ft @ 1600 rpm Fuel System L96 Fuel System Type L96: Electronic Fuel Injection (EFI) Fuel System Lml Fuel System Type Lml: Common Rail Direct Injection (CRDI) Emission Controls Lml Emission System Lml: Diesel Particulate Filter (DPF), Selective Catalytic Reduction (SCR) with Diesel Exhaust Fluid (DEF) injection 🔧 Transmission Standard Transmission Type: 6-speed automatic Transmission Model: Allison 1000 Features Powertrain Grade Braking: Integrated exhaust brake (Duramax models) Fluid Specifications Transmission Fluid Type: Dexron VI (for Allison 1000) 📐 Dimensions Exterior Wheelbase Options: 143.5 inches (Regular Cab), 157.5 inches (Extended Cab), 173.5 inches (Crew Cab) Bed Length Options: 6.5 ft (Standard Bed), 8.0 ft (Long Bed) Weights Gvwr Range: 10,000 lbs to 13,025 lbs Curb Weight Range: 6,000 lbs to 7,500 lbs (approximate) 🛡️ Safety Features Ratings NHTSA Rollover Resistance: Typically 3 Stars (for 2WD) or 4 Stars (for 4WD) depending on configuration Active Features ABS: Standard Anti-lock Braking System Stability Control: Standard StabiliTrak with Trailer Sway Control Passive Features Airbags: Front airbags for driver and passenger 💡 Technology Features Infotainment Infotainment System: Available Chevrolet MyLink system with touchscreen interface, Bluetooth connectivity, USB ports. Driver Assistance Towing Features: Integrated trailer brake controller, tow/haul mode, optional rearview camera. Connectivity Onstar: Available OnStar services with vehicle diagnostics and communication capabilities. 🔧 Maintenance Service Intervals Gasoline Oil Change Interval Gasoline: Every 7,500 miles or 6 months (synthetic blend recommended) Service Intervals Diesel Oil Change Interval Diesel: Every 5,000 miles or 6 months (severe duty/towing may require more frequent changes) Diesel Particulate Filter Regeneration: Automatic regeneration cycles, manual regeneration capability via scan tool Fluid Specifications Engine Oil Spec Gasoline: SAE 5W-30 Synthetic Blend (API SN) Engine Oil Spec Diesel: SAE 15W-40 Synthetic (API CJ-4 or CK-4) Coolant Type: Dex-Cool (Orange) 50/50 mix Brake Fluid Type: DOT 3 Known Issues Duramax Emissions System: Potential issues with DPF clogging or SCR system faults requiring specific diagnostic procedures detailed in the manual. Suspension Wear: Front end component wear (ball joints,...