🏷️ Basic Information Identification Make: Chevrolet Model: Silverado HD (Duramax Diesel) Model Year: 2012 Engine Type: Duramax Diesel Generation Truck Platform: GMT900 👋 Introduction Market Position Vehicle Segment: Heavy-Duty Pickup Truck Key Selling Point: Duramax diesel powertrain for towing, hauling, and robust performance. Competitive Analysis Direct Competitors: Ford Super Duty (Power Stroke diesel), Ram Heavy Duty (Cummins diesel). Key Features Powertrain Emphasis: Highlights the specific capabilities and maintenance needs of the Duramax diesel engine. Owner Focus: Aims to educate owners on the proper care and operation of their diesel truck. 📋 Manual Details Coverage Areas Manual Title: 2012 CHEVY/Chevrolet Duramax Diesel Supplement Owners Manual Primary Focus: Diesel-specific features and operation for the 2012 Chevrolet Duramax Diesel models Additional Topics: Instrument Cluster, Driver Controls, Driving Techniques, Customer Assistance, Safety Defect Reporting (US), Cleaning, Maintenance, Specifications, Engine Compartment, Engine Oil, Battery, Fuel System, Air Filter, Part Numbers, Refill Capacities, Lubricant Specifications, Accessories Page Count Estimated Page Count: Varies by specific supplement, typically 50-100 pages for a supplement. Manual Type Type: Supplement Owner's Manual Language Language: English Format Format: Digital PDF 📖 Manual Coverage Systems Covered Engine Systems: Duramax diesel engine operation, diesel fuel system, exhaust system considerations, glow plug system, EGR system (if applicable), engine cooling system specific to diesel. Instrumentation: Diesel-specific gauges (e.g., diesel particulate filter status, DEF gauge if applicable for other models, glow plug indicator), warning lights specific to diesel powertrains. Driver Controls: Diesel exhaust brake operation (if equipped), trailer brake controller integration, exhaust brake activation. Procedures Included Maintenance: Diesel-specific maintenance schedules, recommended service intervals for diesel components, diesel engine oil and filter change procedures, fuel filter replacement, air filter replacement specific to diesel intake, battery maintenance for diesel applications. Fluid Management: Engine oil viscosity and capacity specifications for Duramax diesel, diesel fuel quality recommendations, coolant specifications for diesel engines, DEF (Diesel Exhaust Fluid) refill procedures (if applicable to 2012 model variant). Technical Depth Depth: Designed for the owner, focusing on operational understanding, basic maintenance, and awareness of diesel-specific features and troubleshooting. It's a supplement, not a full service manual, so it won't cover in-depth internal engine repairs. 📊 Manual Specifications File Format Compatibility: Requires a PDF reader (e.g., Adobe Acrobat Reader, Foxit Reader). Searchability: Typically searchable text within the PDF format. Print Quality Quality: Factory original quality, as it's compiled from factory documentation. Binding Type Type: N/A (Digital PDF format) Paper Type Type: N/A (Digital PDF format) ⚙️ Engine Specifications Primary Engine Engine Code: LLY, LBZ, LMM, or LML variants of the 6.6L Duramax depending on exact Silverado HD trim for 2012. LML is most probable for newest models. Engine Description: 6.6L V8 Turbocharged Duramax Diesel Performance Horsepower Est: Approximately 397-400 hp (for LML engine, common in 2012 HD models) Torque Est: Approximately 765 lb-ft (for LML engine, common in 2012 HD models) Fuel System Injection Type: Common Rail Direct Injection Fuel Type: Diesel Fuel Emission Control System: Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) with Diesel Exhaust Fluid (DEF) injection is highly likely for the 2012 model year LML Duramax, requiring specific owner knowledge. 🔧 Transmission Standard Type: Allison 1000 6-speed automatic transmission Optional Type: Not typically applicable for diesel models, Allison is standard. Features Towing Mode: Tow/Haul mode for optimized shifting under load. 📐 Dimensions Exterior Body Styles: 2500HD, 3500HD; Regular Cab, Extended Cab, Crew Cab; 6.5' box, 8' box Weights Curb Weight Range Est: 6,000 - 7,500 lbs (depending on configuration) Gvwr Range Est: 9,200 lbs (2500HD) to 14,200 lbs (3500HD DRW) 🛡️ Safety Features Ratings NHTSA Overall Est: Generally high for heavy-duty trucks, often 4 or 5 star depending on configuration and testing year. Active Features Standard: ABS, Traction Control, Stability Control (StabiliTrak), Daytime Running Lights. Passive Features Standard: Front airbags, front side-impact airbags (may be optional on some trims), passenger sensing system. 💡 Technology Features Infotainment Available Systems: Chevrolet MyLink infotainment system (available on higher trims), AM/FM stereo, CD player, auxiliary input, USB port, Bluetooth connectivity. Driver Assistance Available Features: Rearview camera, park assist sensors (rear), integrated trailer brake controller. Connectivity Options: OnStar telematics system (subscription-based). 🔧 Maintenance Service Intervals Oil Change: Typically every 5,000 to 7,500 miles or 6 months, or based on oil life monitoring system. Consult manual for specific recommendations. Fuel Filter: Recommended replacement every 15,000 to 30,000 miles, crucial for diesel health. Consult manual for exact interval. Air Filter: Inspection at every oil change, replacement based on driving conditions or manufacturer recommendation (e.g., 20,000-30,000 miles). Fluid Specifications Engine Oil: API CK-4 or CJ-4 certified diesel engine oil, SAE 5W-40 viscosity recommended. Capacity: approx. 10 quarts (9.5 liters). Specific part numbers for filters (e.g., ACDelco PF2232 for oil filter). Coolant: Dex-Cool 50/50 mix (GM P/N 12346515 or equivalent extended life coolant). Capacity varies by model but is substantial for HD trucks. Transmission Fluid: Dexron VI ATF (for Allison...