Vehicle Category:
High-mobility, off-road, military-derived civilian vehicle
Target Audience:
Enthusiasts, off-roaders, military surplus collectors, and owners seeking in-depth repair knowledge.
Segment Competitors:
Limited direct competitors in civilian market; shares traits with highly specialized off-road vehicles.
Vehicle Design Philosophy:
Ruggedness, durability, and extreme off-road capability inherited from military origins.
Manual Advantage:
Provides dealership-level technical information typically unavailable to the general public, enabling extensive DIY maintenance and repair.
Engine Service And Repair:
Detailed procedures for all engine variants, including disassembly, inspection, assembly, and tuning.
Transmission Service And Repair:
Complete overhaul procedures for automatic and manual transmissions, including torque converter, clutch packs, and gearsets.
Drivetrain And Axles:
Front and rear axle service, differentials, CV joints, driveshafts, and transfer case.
Suspension System:
Independent front and rear suspension, shock absorbers, springs, control arms, and alignment procedures.
Braking System:
Front and rear disc brake systems, hydraulic lines, master cylinder, brake boosters, and ABS diagnostics.
Steering System:
Power steering system, steering gear, steering column, and linkage components.
Electrical System:
Comprehensive wiring schematics, electrical diagrams, component locations, and diagnostic procedures.
Lighting System:
Headlights, taillights, interior lighting, and auxiliary lighting circuits.
Instrumentation And Gauges:
Dashboard instruments, warning lights, and sensor diagnostics.
Climate Control System:
Air conditioning, heating, ventilation, blower motor, and refrigerant system service.
Safety Systems:
Airbag system diagnostics and service, seatbelt mechanisms.
Body And Frame:
Body panel removal and installation, structural repair, door and window mechanisms.
Interior Trim:
Seat removal, dashboard disassembly, trim panel replacement.
Diagnostic Troubleshooting:
Component testing, fault code interpretation, and systematic diagnostic approaches.
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, tire rotations.
Major Repairs:
Engine rebuilds, transmission overhauls, suspension component replacement, brake system overhauls.
Troubleshooting Guides:
Step-by-step troubleshooting for common and uncommon issues.
Wiring Diagrams:
Detailed and color-coded wiring schematics for all electrical systems.
Diagnostic Codes:
OBD-II codes, specific Hummer DTCs, and troubleshooting strategies.
Component Replacement:
Instructions for replacing virtually every component on the vehicle.
Specifications And Tolerances:
All necessary torque specifications, clearances, and tolerances for assembly and repair.
Special Tools:
Identification and usage instructions for specialized tools required for certain procedures.
Depth Of Coverage:
Comprehensive, covering everything from minor adjustments to complete vehicle teardown and rebuild.
Diagnostic Capabilities:
Advanced diagnostic procedures for identifying and resolving complex mechanical and electrical faults.
Repair Complexity:
Suitable for both DIY enthusiasts and professional technicians, with clear, illustrated instructions.
Transmission Type:
4-speed Automatic (4L80-E)
Transmission Type Optional:
5-speed Manual (New Venture NV4500HD - less common in civilian models)
Transfer Case:
2-speed, permanent 4-wheel drive with locking differentials (front, center, rear)
Gear Ratios 4L80E:
2.482 (1st), 1.480 (2nd), 1.000 (3rd), 0.750 (4th)
Automatic Transmission Fluid:
Dexron III (or compatible)
Overall Length:
Approx. 184.5 inches (4686 mm) - varies slightly by body style
Overall Width:
Approx. 86.5 inches (2197 mm)
Overall Height:
Approx. 77.4 inches (1966 mm) - varies by body style
Curb Weight:
Approx. 6,700 - 7,500 lbs (3039 - 3402 kg)
Gross Vehicle Weight Rating Gvwr:
Approx. 9,700 lbs (4400 kg)
Towing Capacity:
Up to 12,000 lbs (5443 kg)
Engine Oil Change:
Every 5,000 miles or 6 months, whichever comes first (diesel).
Transmission Fluid Change:
Every 30,000 - 60,000 miles, or as per manual recommendations, depending on usage.
Fuel Filter Replacement:
Every 15,000 - 30,000 miles (diesel).
Coolant Flush:
Every 30,000 - 60,000 miles or 2-3 years.
Engine Oil Type:
API CI-4 or CH-4 rated 15W-40 Diesel Engine Oil.
Engine Oil Capacity:
9 quarts (8.5 liters) with filter change for 6.5L Diesel.
Coolant Type:
Ethylene Glycol based antifreeze (e.g., Dex-Cool compatible or equivalent)
Common Problems:
Glow plug issues (diesel), alternator failures, vacuum pump leaks, potential overheating under heavy load (ensure cooling system is maintained).
