Segment:
Mid-size SUV, known for off-road capability and distinctive styling
Key Competitors:
Jeep Wrangler Unlimited, Toyota FJ Cruiser, Nissan Xterra, Ford Explorer Sport Trac (for H3T)
Design Philosophy:
Rugged, military-inspired styling, strong off-road performance
Manual Value Proposition:
Provides professional-level repair information for DIY enthusiasts and independent mechanics, enabling cost savings and proper vehicle maintenance.
Primary Coverage:
All Hummer H3 models
Engine Variants Covered:
3.7L Vortec I5 (LLR), 5.3L Vortec V8 (LH6)
Transmission Variants Covered:
4-speed 4L60-E automatic, 5-speed manual (H3T only)
Estimated Page Count:
Hundreds of pages (exact count not specified, but described as comprehensive)
Type:
Factory Service Repair Workshop Manual
Engine Management:
Engine diagnostics, fuel system, ignition system, emission controls, cooling system, lubrication system
Drivetrain:
Transmission (automatic and manual), transfer case, drivelines, axles, differentials, locking differentials
Suspension Steering:
Front and rear suspension components, steering gear, power steering system, steering column
Brakes:
Brake system diagnosis, hydraulic components, ABS (Anti-lock Braking System), parking brake
Electrical:
Battery, charging system, starting system, lighting system, instrument cluster, body control modules, power accessories
HVAC:
Heating, ventilation, and air conditioning system diagnosis and repair
Body Interior:
Body panels, doors, glass, interior trim, seats, airbags
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks and top-offs, tune-ups
Troubleshooting:
Diagnostic procedures for common and complex issues, symptom-based troubleshooting guides
Repair:
Component removal and installation, major and minor repairs, overhauls
Diagnostics:
Use of diagnostic tools, OBD-II (On-Board Diagnostics II) procedures, reading and interpreting fault codes
Depth:
Comprehensive, covering routine maintenance to complete engine and transmission rebuilds
Detail Level:
Detailed step-by-step instructions, exploded diagrams, high-resolution photographs
Compatibility:
Windows and MAC computers, tablets, and smartphones
Printability:
Printable: Single pages or the entire manual
Binding:
N/A (Digital Download)
Paper Type:
N/A (Digital Download)
Usage License:
Unlimited lifetime use on multiple devices, no expiry dates
Engine Type 1:
Inline 5-Cylinder (Vortec LLR)
Displacement 1:
3.7 Liters (226 cubic inches)
Horsepower 1:
242 hp @ 5600 rpm
Torque 1:
242 lb-ft @ 4600 rpm
Engine Type 2:
V8 (Vortec LH6)
Displacement 2:
5.3 Liters (325 cubic inches)
Horsepower 2:
300 hp @ 5200 rpm
Torque 2:
320 lb-ft @ 4000 rpm
Fuel Delivery System:
Sequential Electronic Fuel Injection (SFI)
Fuel Type:
Unleaded gasoline, Minimum 87 octane
Transmission Type:
4-speed automatic (4L60-E)
Transmission Type H3T:
5-speed manual (NV1500)
Transfer Case:
2-speed electronically controlled transfer case with 4WD Auto, 4WD Lock, and 4WD Low modes
Differential Lock:
Rear locking differential standard on many models, front optional
Wheelbase:
119.9 inches (3045 mm)
Length:
192.2 inches (4882 mm)
Width:
77.1 inches (1958 mm)
Height:
75.9 inches (1928 mm)
Curb Weight 3.7L:
Approximately 4,700 - 4,900 lbs (2132 - 2223 kg)
Curb Weight 5.3L:
Approximately 5,000 - 5,200 lbs (2268 - 2359 kg)
Towing Capacity:
Up to 5,000 lbs (2268 kg)
NHTSA Rollover Resistance:
4/5-star rating (indicating good rollover resistance for its class)
Traction Control:
StabiliTrak (Traction Control and Stability Control)
ABS:
4-wheel Anti-lock Braking System (ABS)
Airbags:
Front airbags, side curtain airbags (optional/standard depending on trim)
Seatbelts:
3-point safety belts with pretensioners
Audio System:
AM/FM stereo with CD player, optional navigation system, auxiliary input jack
Speaker Configuration:
Standard 6-speaker system, optional 7-speaker Bose premium audio
Parking Assist:
Rear parking assist sensors (optional)
Bluetooth:
Bluetooth for hands-free calling (optional, via specific infotainment packages)
Oil Change Interval:
Every 7,500 miles or 6 months (whichever comes first), or every 5,000 miles if operating in severe conditions.
Tire Rotation:
Every 7,500 miles
Spark Plug Replacement:
3.7L: 100,000 miles; 5.3L: 100,000 miles (iridium plugs)
Engine Oil Type:
SAE 5W-30 Synthetic Oil (API SN or newer)
Engine Oil Capacity:
3.7L: 5.5 quarts (5.2 L); 5.3L: 6 quarts (5.7 L)
Transmission Fluid Type Auto:
Dexron VI Automatic Transmission Fluid
Transmission Fluid Capacity Auto:
Approx. 5-6 quarts (dry fill for 4L60-E)
Transfer Case Fluid Type:
Dexron III/VI Automatic Transmission Fluid
Coolant Type:
GM P/N 12346794 (or equivalent), Orange/Pink colored Dex-Cool compatible coolant
Common Concern 1:
Torque converter shudder or slippage in automatic transmissions
Common Concern 2:
Front differential wear or noise, especially in off-road use
Common Concern 3:
Water pump leaks or bearing noise
Common Concern 4:
Electrical gremlins, particularly with body control modules or sensors
Brand Legacy:
Hummer was originally a brand of off-road vehicles derived from the military High Mobility Multipurpose Wheeled Vehicle (HMMWV).
H3 Introduction:
The H3 was introduced for the 2006 model year as a smaller, more affordable alternative to the H1 and H2.
2009 Updates:
For 2009, the H3 received a power increase for the 3.7L engine and various minor interior and exterior refinements.
Production Period:
2005-2010
Manufacturer:
General Motors (GM)
Off Road Capability Recognition:
Consistently praised for its off-road prowess, often compared favorably to dedicated off-road vehicles.
Fuel Economy Rating:
Generally considered poor to average for its class, a common criticism of the Hummer brand.
