2004 Hummer H2 Parts
The 2004 Hummer H2 shipped with one engine — the 6.0L V8 — and 2,446 matched parts listed for it. Pick a parts category below to see every part matched to it.
Every part carries its brand and manufacturer part number, so you can compare OEM-grade and aftermarket options for the same fitment and cross-reference the number against the part you're replacing before anything goes in the cart.
Browse by Engine
Not sure which engine you have? Check the emissions label under the hood, your registration, or decode the VIN — the 8th character usually identifies the engine.
Parts by Category
Belt Drive Parts
90 parts · 4 subcategories · 17 brands Verified fitment Spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys.Body & Lamp Assembly Parts
136 parts · 42 subcategories · 24 brands Verified fitment Covers the exterior panels, bumpers, mirrors, lamps and the trim that keeps weather and road debris out.Brake & Wheel Hub Parts
573 parts · 44 subcategories · 54 brands Verified fitment Handles stopping power and keeps each wheel turning true on its bearing and hub assembly.Cooling System Parts
171 parts · 24 subcategories · 49 brands Verified fitment Keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.Drivetrain Parts
398 parts · 74 subcategories · 36 brands Verified fitment Moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.Electrical Parts
95 parts · 19 subcategories · 24 brands Verified fitment Covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.Electrical Bulb & Socket Parts
171 parts · 23 subcategories · 17 brands Verified fitment Covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination.Electrical Connector Parts
484 parts · 128 subcategories · 20 brands Verified fitment Supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.Electrical Switch & Relay Parts
251 parts · 47 subcategories · 20 brands Verified fitment Covers the switches, relays and flashers that route power to everything the driver touches.Engine Parts
77 parts · 1 subcategory · 2 brands Verified fitment Covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components.Confirm your configuration
Other Hummer H2 Years
Getting Fitment Right on the 2004 Hummer H2
The 2004 Hummer H2 shipped with a single engine — the 6.0L V8 — which keeps fitment straightforward: all 2,446 parts listed for this model year are matched to that configuration. What still deserves attention is the notes column on each part, where position (front/rear, left/right), trim and production-date qualifiers live.
Every part across the 10 categories shows its brand and manufacturer part number. Use the number to cross-reference: match it to the part coming off the vehicle, compare an OEM-supplier part against its aftermarket equivalent, or verify a shop's estimate line by line. When a number is discontinued, the same-fitment parts around it are the fastest path to a current replacement.
Frequently Asked Questions
How many parts fit the 2004 Hummer H2?
We list 2,446 parts for the 2004 Hummer H2, organized into 10 categories. Every part includes the brand, manufacturer part number and fitment notes.
Which engine does the 2004 Hummer H2 have?
A single engine is listed for this model year: the 6.0L V8. Every part listed for the 2004 Hummer H2 is matched to it, so there's no engine ambiguity — just check the notes column for position and trim qualifiers.
Are OEM and aftermarket parts both available for the 2004 Hummer H2?
Yes — parts come from original-equipment suppliers and established aftermarket brands, shown side by side with their part numbers where both cover the same fitment. Cross-referencing those numbers is how you confirm an aftermarket part genuinely replaces the OEM one.
How do I verify a part number fits my 2004 Hummer H2?
Search the number on this site: the result shows the part, its brand and every configuration with published fitment. If your exact year, model appear in that list, the number is a match. The notes column carries any remaining qualifiers — position, trim or production date.
Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.