🏷️ Basic Information Identification Make: GMC Model: V1500 Suburban Year: 1991 Generation Generation: Third Generation (GMT400) Codes Platform Code: GMT400 👋 Introduction Market Position Market Segment: Full-size SUV market, aimed at families and individuals requiring substantial passenger and cargo capacity. Competitive Analysis Competitors: Ford Bronco, Chevrolet K1500 Blazer (in its then-SUV form), Dodge Ramcharger. Key Features Key Selling Points: Body-on-frame construction for durability, robust V8 engine options, substantial towing and hauling capability, spacious interior. Manual Advantage: Offers licensed, OE-derived information, providing accuracy and depth superior to generic repair guides. Convenient digital access replaces cumbersome printed manuals. 📋 Manual Details Coverage Areas Manual Type: Service and Repair Manual Format: Online Software / Digital Access Language: English Access Duration: 1 Year (with option for extension) Device Compatibility: PC, Laptop, Smartphone, Tablet (via web browser) 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, fuel system, cooling system, lubrication system, exhaust system, ignition system, emissions control Drivetrain: Automatic transmission, transfer case (4WD), drive shafts, axles, differentials Suspension Steering: Front suspension, rear suspension, steering system, power steering Brakes: Front disc brakes, rear drum brakes, anti-lock braking system (ABS) if equipped, hydraulic system, parking brake Electrical: Battery, charging system, starting system, lighting, instrumentation, interior/exterior electrical components, wiring diagrams HVAC: Heating, ventilation, and air conditioning (HVAC) system components and service Body: Body panels, doors, windows, interior trim, exterior trim, chassis components Procedures Included Maintenance: Scheduled maintenance tasks, fluid checks and changes, filter replacements, lubrication, tune-ups Troubleshooting: Diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides Repair: Step-by-step repair instructions for all major systems, component removal and installation Diagnostics: Diagnostic trouble codes (DTCs) and their meanings, diagnostic strategies, use of diagnostic tools Technical Depth Depth: Comprehensive; covers routine maintenance to complete engine and transmission overhauls. Includes detailed torque specifications, clearances, and assembly procedures. 📊 Manual Specifications File Format File Format Details: Proprietary web-based software, licensed content derived from OE (Original Equipment) materials. Print Quality Print Quality Notes: Digital format, optimized for screen viewing. Printable pages are available. Binding Type Binding Type Notes: Not applicable (digital format). Paper Type Paper Type Notes: Not applicable (digital format). ⚙️ Engine Specifications Primary Engine Engine Code: L05 Engine Description: 5.7L (350 ci) V8 OHV Tuned Port Injection (TPI) Performance Horsepower L05: 210 HP @ 4000 RPM Torque L05: 300 lb-ft @ 2400 RPM Fuel System Fuel Delivery: Tuned Port Injection (TPI) Fuel Type: Unleaded gasoline Other Engine Options Optional Engine Code: L03 Optional Engine Description: 5.0L (305 ci) V8 Throttle Body Injection (TBI) Optional Engine Horsepower: 178 HP @ 4000 RPM Optional Engine Torque: 245 lb-ft @ 2400 RPM 🔧 Transmission Standard Transmission Transmission Type: 4-speed Automatic (4L60E) Optional Transmission Transmission Type: None offered for V1500 4WD models in 1991 Features Drive System: Full-time 4WD (V1500 designation) 📐 Dimensions Exterior Wheelbase: 131.5 inches (3338 mm) Length: 211.9 inches (5382 mm) Width: 79.5 inches (2019 mm) Height: 73.7 inches (1872 mm) Weights Curb Weight Approx: 4,800 - 5,100 lbs (2177 - 2313 kg) Gross Vehicle Weight Rating Gvw: 6,400 - 7,000 lbs (2903 - 3175 kg) Cargo Cargo Volume Behind 3Rd Seat: Approx. 46.1 cu ft Cargo Volume Behind 2Nd Seat: Approx. 89.7 cu ft Cargo Volume Behind 1St Seat: Approx. 131.4 cu ft 🛡️ Safety Features Ratings NHTSA Ratings: Information for this specific year and model is not readily available in a standardized format comparable to modern crash test ratings. Likely received ratings consistent with other large SUVs of the era. Active Features ABS: Optional Anti-lock Braking System (ABS) on rear wheels, later models offered 4-wheel ABS. Passive Features Seat Belts: Three-point seat belts for front occupants, lap belts for rear occupants. Rollover Protection: Body-on-frame construction provides inherent structural integrity in rollovers compared to unibody vehicles. 💡 Technology Features Infotainment Audio System: Factory AM/FM stereo with cassette player, optional CD player. Speaker configurations varied by trim. Driver Assistance Cruise Control: Available as an option or standard on higher trims. Connectivity None: No modern connectivity features like Bluetooth or USB ports; relies on analog systems. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000 miles or 3 months, whichever comes first (typical for the era). Transmission Fluid Change: Every 30,000 miles or 24 months (typical). Spark Plug Replacement: TBI: 30,000 miles; TPI: 60,000 miles (typical). Fluid Specifications Engine Oil Specification: API Service SG or SH, SAE 5W-30 or 10W-30 (depending on climate) Engine Oil Capacity: 5.0 quarts (4.7 liters) with filter for 5.0L/5.7L V8 (L03/L05) Transmission Fluid Specification: Dexron-III (or equivalent) Transmission Fluid Capacity: Approx. 4.0 quarts (3.8 liters) dry fill, 12.0 quarts (11.4 liters) total capacity for 4L60E. Coolant Specification: Ethylene glycol-based coolant, 50/50 mix with distilled water. Power Steering Fluid: GM Power Steering Fluid (or Dexron-III equivalent) Known Issues Common Wear Items: Ball joints, tie rod ends, wheel bearings, exhaust system components, radiator, water pump. Electrical gremlins can occur with...