Chevrolet Blazer Key Fob Programming
Updated 2026 2002–2005 4 model years
The Chevrolet Blazer key fob has to be programmed by an automotive locksmith or dealer — there is no at-home procedure. Below is the exact replacement fob you need for each model year (FCC ID and part number), the battery it takes, and what programming costs.
Every Chevrolet Blazer model year
| Year | Programming | Key fob | Battery |
|---|---|---|---|
| 2005 |
| Remote, Transponder Key · 4-button | CR2032 battery on Amazon |
| 2004 |
| Remote, Transponder Key · 4-button | CR2032 battery on Amazon |
| 2003 |
| Remote, Transponder Key · 4-button | CR2032 battery on Amazon |
| 2002 |
| Remote, Transponder Key · 4-button | CR2032 battery on Amazon |
2003–2005 Chevrolet Blazer
Remote / key fob programming
This remote can't be programmed with a do-it-yourself procedure. The vehicle needs a diagnostic tool connected to its OBD port to pair a new remote, so a replacement has to be set up by an automotive locksmith or a dealer.
Order the correct replacement remote below — match the FCC ID on your current fob first — then have a local automotive locksmith or the dealer program it to your vehicle.
Key programming
This key fob can't be programmed with a do-it-yourself procedure. The vehicle needs a diagnostic tool connected to its OBD port to pair a new fob, so a replacement has to be set up by an automotive locksmith or a dealer.
Order the correct replacement fob below — match the FCC ID on your current fob first — then have a local automotive locksmith or the dealer program it to your vehicle.
Replacement key fobs
Find your key type below, then match the FCC ID printed on the back of your existing fob — or, for a plain transponder key, the blank code — to be sure of the right part.
Remote
A separate key fob that only handles locking and unlocking.
4-button Remote
Find on Amazon- FCC ID
- KOBLEAR1XT
- OE part #
- 10443537, 15043458, 15184352, 15184353, 25695954, 25695955
- Frequency
- 315 MHz
Transponder Key
3 versionsA cut metal key with a chip in the head. No buttons.
Transponder Key
Find on Amazon- Key blank
- B102P, B91P
- OE part #
- 23372321, 5928818, B102-P, B102P
Transponder Key
Find on Amazon- Key blank
- GM-39
- OE part #
- B102, P1113
Transponder Key
Find on Amazon- Key blank
- B102
- OE part #
- B102
Photos show the OEM part for each number listed. Aftermarket replacements sold online are often slightly different in appearance — the FCC ID, not the shape, is what determines whether a fob will work with your car.
2002 Chevrolet Blazer
Remote / key fob programming
This remote can't be programmed with a do-it-yourself procedure. The vehicle needs a diagnostic tool connected to its OBD port to pair a new remote, so a replacement has to be set up by an automotive locksmith or a dealer.
Order the correct replacement remote below — match the FCC ID on your current fob first — then have a local automotive locksmith or the dealer program it to your vehicle.
Key programming
This key fob can't be programmed with a do-it-yourself procedure. The vehicle needs a diagnostic tool connected to its OBD port to pair a new fob, so a replacement has to be set up by an automotive locksmith or a dealer.
Order the correct replacement fob below — match the FCC ID on your current fob first — then have a local automotive locksmith or the dealer program it to your vehicle.
Replacement key fobs
Find your key type below, then match the FCC ID printed on the back of your existing fob — or, for a plain transponder key, the blank code — to be sure of the right part.
Remote
2 versionsA separate key fob that only handles locking and unlocking.
4-button Remote
Find on Amazon- FCC ID
- KOBLEAR1XT
- OE part #
- 10443537, 15043458, 15184352, 15184353, 25695954, 25695955
- Frequency
- 315 MHz
4-button Remote
Find on Amazon- FCC ID
- EZSOEMTX
- OE part #
- 12490829, 12490830, 12495653, 12495745
- Frequency
- 433 MHz
Transponder Key
3 versionsA cut metal key with a chip in the head. No buttons.
Transponder Key
Find on Amazon- Key blank
- B102P, B91P
- OE part #
- 23372321, 5928818, B102-P, B102P
Transponder Key
Find on Amazon- Key blank
- GM-39
- OE part #
- B102, P1113
Transponder Key
Find on Amazon- Key blank
- B102
- OE part #
- B102
Photos show the OEM part for each number listed. Aftermarket replacements sold online are often slightly different in appearance — the FCC ID, not the shape, is what determines whether a fob will work with your car.
Chevrolet Blazer key fob battery
Your Chevrolet Blazer key fob uses a CR2032 3V lithium coin cell. A fresh one typically lasts 3–5 years.
Buy Energizer CR2032 Lithium Coin Batteries (4-pack) on AmazonHow to replace the battery
- 1 Find the seam or small slot on the edge of the remote.
- 2 Twist a coin or small flathead in the slot to split the case open.
- 3 Remove the old coin cell and note the + side.
- 4 Fit the new battery with the + side matching, then close the case.
- 5 Press a button to confirm the LED lights, then test at the car.
Battery tips
- Use a fresh, name-brand 3V lithium cell — bargain cells drain quickly.
- Try not to touch both faces of the new battery; skin oils shorten its life.
- If the remote still doesn't work after a new battery, it may need re-syncing or programming.
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