Hummer H3 Key Fob Programming by Year
Your H3 needs a programmer or security access — but not the dealer. We come to you and program it on site. Find your year below.
Find your year
| Year | DIY onboard? | How it programs | Working fob? | Erase risk | Confidence | Best next step |
|---|---|---|---|---|---|---|
| 2007–2009 | No | No - professional only | Yes (1 working) | Yes | High | We program it on site |
Hummer H3 key types & programming facts
2007–2009 Hummer H3 models in the U.S. and Canada use a separate transponder ignition key and a separate 3‑button remote keyless entry fob. Programming of both the immobilizer key and keyless entry remotes requires a professional‑grade scan tool (e.g., GM Tech 2 or equivalent) connected to the vehicle’s BCM; there is no owner “button-sequence” or onboard self‑programming method for adding remotes or keys.
Key types used on the H3:
- separate metal transponder ignition key + separate keyless entry remote (3‑button fob) (2007-2009)
Common fob FCC IDs: L2C0007T — check the back of your fob; we confirm the exact variant on site.
About programming your Hummer H3 key
Across the 2007–2009 Hummer H3 model years we cover, key programming is manufacturer-controlled: every year listed above routes to a programmer or security-access procedure rather than an owner-followable onboard sequence. That is normal for this platform — the immobilizer pairs the key’s transponder to the vehicle through an encrypted handshake, so a blank or aftermarket fob will not start the engine until it is properly programmed.
What that means for you: you do not need the dealership. A mobile locksmith brings the programmer to your location, identifies your exact key type and FCC ID from the fob, cuts or sources the correct key if needed, and programs it on site — including all-keys-lost cases where no working key remains.
To program your H3, have ready: your model year and trim, whether you still have a working key, and the fob itself if you have one (the FCC ID printed on the back identifies the exact key variant). Call (833) 439-8636 and we confirm the route and a firm price before we dispatch.
2007–2009 Hummer H3
Professional programming required
Professional programming for the 2007–2009
This year requires professional programming (security access / tool). A mobile locksmith confirms your key type and FCC ID, then programs it on site.
For the 2007–2009 H3: H3 key replacement & all compatible fobs →
How we validate this guide
Year coverage comes from our consolidated vehicle programming dataset. Route-level programming status is reviewed against internal route sheets and available manufacturer, security-access, and professional tool references. Exact button sequences are marked source-verified only when we have year/equipment-specific support; where a year is labeled “route verified, steps vary,” we confirm the exact fob, trim, and prompts before programming. Reviewed for route and safety by Mohammad H. Abdelhadi, ALOA-Certified Master Locksmith.
| Year | Route status | Exact steps |
|---|---|---|
| 2007–2009 | Professional-only | Professional route |
Common questions
Can I program a new Hummer H3 key fob myself?
No. The H3 does not have a self‑programming button sequence; adding remotes requires a compatible scan tool such as GM Tech 2 or equivalent, typically done by a locksmith or dealer.
What remote fob is used on 2007–2009 Hummer H3 in the U.S. and Canada?
These H3 models use a 3‑button keyless entry remote, commonly listed under GM part number 10335583 with FCC ID L2C0007T for the U.S./Canada market.
What battery does the Hummer H3 key fob use?
The H3 keyless entry remote uses a CR2032 coin cell battery.
Can you program a H3 key fob without going to the dealership?
For most years, yes - the route is onboard relearn or an OBD tool, both of which a mobile locksmith handles at your location.
Does this program the remote only, or the transponder key too?
It depends on your key type. Tell us your FCC ID and we will confirm.
What if my year says professional programming required?
Those years need a programmer or security access; we bring the tool to you and program it on site.
How much does it cost?
It depends on year, key type, and whether you have a working key. Call (833) 439-8636 for a firm price before we dispatch.