Vehicle Segment:
Full-size luxury SUV, Off-road capable
Competitors 2004:
Cadillac Escalade, Lincoln Navigator, Toyota Land Cruiser, Land Rover Discovery Series
Manual Value Proposition:
Vehicle-specific, technician-level detail, comprehensive coverage, digital format benefits (print, zoom, storage)
Diy Empowerment:
Enables owners to perform maintenance, diagnostics, and repairs themselves, saving time and money
Engine Mechanical:
Complete overhaul, diagnostics, tuning, cooling system, lubrication
Engine Control:
ECM diagnostics, fuel injection, ignition system, emission control systems
Transmission:
Automatic Transmission (4L65-E) service, repair, diagnostics, fluid specifications
Drivetrain:
Transfer case operation and repair, drive shafts, differentials (front and rear), axle components
Suspension Steering:
Front and rear suspension components, power steering system, steering column, wheel alignment specifications
Brakes:
Hydraulic brake system, ABS, traction control, parking brake system, caliper and rotor service
Electrical Electronics:
Wiring schematics, multiplex communication (CAN bus), starter, charging system, lighting, battery, fuses, relays
HVAC:
Air conditioning system service, refrigerant handling, climate control diagnostics
Restraint Systems:
Supplemental Restraint System (SRS), airbag system diagnostics and service, seat belts
Body Interior:
Body panels, doors, hood, glass, mirrors, interior trim, seats, instrument panel, exterior trim
Maintenance:
Scheduled maintenance, fluid checks and changes, filter replacements, lubrication points
Diagnostics:
Troubleshooting guides, symptom-based diagnostics, OBD-II diagnostic trouble codes (DTCs)
Repair Rebuild:
Step-by-step repair procedures for all major vehicle components and systems
Wiring Schematics:
Detailed, system-specific wiring diagrams for electrical troubleshooting
Depth:
Factory-level detail, suitable for professional technicians and advanced DIYers
Diagnostic Tools:
Implicitly covers use of advanced diagnostic tools and scan equipment
Rebuild Procedures:
Comprehensive rebuild procedures for major mechanical components (engine, transmission, differentials)
Searchability:
Likely searchable text within PDF
Printability:
All pages printable, with option to enlarge images
Digital Binding:
Single, integrated PDF document
Digital Paper Emulation:
Emulates high-quality, durable paper for printouts
PDF Reader:
Adobe PDF Reader (free)
Unzipping Utility:
Winzip or similar (free)
Image Resolution:
High-resolution diagrams and illustrations for clarity
Engine Type:
Vortec 6.0L V8 SFI
Engine Code:
LQ4 (common for H2)
Horsepower:
325 hp @ 5200 rpm (approximate)
Torque:
370 lb-ft @ 4000 rpm (approximate)
Fuel Delivery:
Multi-port Electronic Fuel Injection (MPI)
Fuel Type:
Unleaded Gasoline, 87 Octane minimum recommended
Coolant Type:
Dex-Cool (GM's Orange Extended Life)
Oil Type:
SAE 5W-30 Synthetic Blend (per GM spec)
Oil Capacity:
7 Quarts (with filter) (approximate)
Transmission Type:
4-Speed Automatic Overdrive
Transmission Model:
4L65-E
Optional Transmission:
N/A for 2004 H2
Transfer Case:
2-Speed Electronic Transfer Case (with Low Range)
Transmission Fluid Type:
Dexron-III (or equivalent approved fluid)
Transmission Fluid Capacity:
9.5 Pints (approximate, dry fill)
Curb Weight:
6,600 - 6,900 lbs (depending on configuration)
Gross Vehicle Weight Rating Gvwr:
8,600 lbs
Towing Capacity:
Up to 9,000 lbs (with proper equipment)
Payload Capacity:
Approximately 1,400 - 1,700 lbs
NHTSA Front Driver Side:
5-Star
NHTSA Front Passenger Side:
5-Star
NHTSA Side Impact Front Passenger:
4-Star
NHTSA Side Impact Rear Passenger:
4-Star
Traction Control:
Standard
ABS:
4-Wheel Anti-lock Braking System (ABS)
Stabilitrak:
Available/Optional (Electronic Stability Control)
Airbags:
Frontal airbags for driver and passenger
Seat Belts:
3-point height-adjustable front seat belts with pretensioners, rear seat belts
Audio System:
Factory premium audio system, often with CD player and optional navigation
Cruise Control:
Standard cruise control system
Onstar:
Optional OnStar communication system available
Tire Pressure Monitoring:
Available/Optional Tire Pressure Monitoring System (TPMS)
Oil Change Interval:
Every 7,500 miles or 6 months (whichever comes first), using synthetic oil
Tire Rotation:
Every 7,500 miles
Transmission Fluid Change:
Every 50,000 - 100,000 miles, or as per manual recommendation for severe use
Coolant Flush Replace:
Every 5 years or 100,000 miles for Dex-Cool
Power Steering Fluid:
GM Power Steering Fluid or Dexron-III (check manual for specific type)
Common Complaints:
Potential for power steering leaks, occasional fuel pump issues, exhaust manifold leaks, HVAC blower motor resistor failures.
Break Job Procedures:
Front and rear brake pad and rotor replacement, caliper service
Brand Origin:
Hummer originated from AM General's development of the High Mobility Multipurpose Wheeled Vehicle (HMMWV).
H2 Introduction Year:
2003
H2 Platform:
Based on a modified GM 900 platform (shared with Chevrolet Tahoe/Suburban, GMC Yukon/Yukon XL).
Production Location:
Mishawaka, Indiana, USA (by AM General for GM)
H2 Production Span:
2003-2009
