Bosma 3-Button Remote Key Fob (FCC ID L2C0007T) – Specs & Fitments

Fitments for the Bosma 4-Button Remote Key Fob (FCC ID KOBGT04A) – Full Guide 3-Button Remote Key Fob (FCC ID L2C0007T) span a wide range of General Motors platforms from the late 1990s through 2012, including the Buick Century, Buick Regal, Chevrolet Colorado, GMC Canyon, Hummer H3, and several Pontiac and Oldsmobile models. Across these vehicles, the unit transmits lock, unlock, and panic commands on a 315 MHz radio frequency — a standard carrier used throughout GM’s keyless-entry architecture of that era. Each Bosma 3-Button Remote Key Fob (FCC ID L2C0007T) must be paired to the vehicle’s body control module (BCM) before it will operate the door locks or trigger the panic alarm. Owners replacing the fob should expect either a dealer-level or on-board programming procedure, depending on the specific vehicle year and platform. When ordering a Bosma 3-Button Remote Key Fob (FCC ID L2C0007T), confirm the FCC ID stamped on the back of the existing remote to ensure electrical and protocol compatibility.

Vehicle Compatibility for the Bosma 3-Button Remote Key Fob (FCC ID L2C0007T)

The following vehicles accept this remote as a direct replacement for the factory keyless-entry transmitter bearing FCC ID L2C0007T:

• Buick Century — 1997 through 2005 model years
• Buick Regal — 1997 through 2004
• Buick Rendezvous
• Chevrolet Colorado — 2004 through 2012
• Chevrolet Venture / Trans Sport
• GMC Canyon — 2004 through 2012
• Hummer H3 — 2005 through 2010
• Oldsmobile Intrigue — 1998 through 2002
• Oldsmobile Silhouette — 1997 through 2004
• Pontiac Aztek — 2001 through 2005
• Pontiac Grand Prix — 1997 through 2003
• Pontiac Montana — 1999 through 2005

All of these platforms share a common GM keyless-entry receiver that operates at 315 MHz. The three-button layout — lock, unlock, and panic — mirrors the OEM configuration used across these models, so the fob provides a drop-in functional match without any wiring or receiver modifications.

Frequency and Signal Characteristics

This Bosma remote broadcasts on the 315 MHz band, the dominant frequency for North American GM keyless-entry systems of the period. The signal is a short-burst, rolling-code transmission: each button press generates a unique encrypted data packet that the BCM validates before executing the requested function. Rolling-code technology prevents replay attacks, meaning a captured signal cannot be reused to unlock the vehicle.

Because the device relies on radio-frequency communication rather than a proximity-based smart-key protocol, it does not need to be inside the vehicle cabin to function. Effective range typically falls between 30 and 80 feet depending on battery condition, ambient RF interference, and whether the vehicle is parked in a structure that attenuates radio signals.

Three-Button Functionality Explained

The three buttons on this fob correspond to the standard GM keyless-entry command set:

1. Lock — Sends a single lock command to the BCM, which actuates all power-door-lock motors simultaneously. On many of the compatible vehicles, pressing lock twice within three seconds triggers a horn chirp confirmation if that feature is enabled in the BCM configuration.
2. Unlock — A single press unlocks the driver’s door only; a second press within five seconds unlocks the remaining doors. This two-stage unlock behavior is a BCM-level setting and can be toggled by a locksmith or dealer scan tool.
3. Panic / Alarm — Holding the panic button activates the horn and headlights for approximately 30 seconds or until the button is pressed again. This function operates independently of any aftermarket alarm installation.

No trunk-release button is present on this three-button variant. Vehicles that had a factory four-button remote with a dedicated trunk or hatch release will still accept the fob for lock, unlock, and panic duties — but that fourth function would require a four-button unit.

Programming Procedure Overview

Many GM vehicles from this era support an on-board programming sequence that does not require professional diagnostic hardware. The general steps for these platforms are:

1. Enter the vehicle, close all doors, and insert the ignition key (not this remote — the mechanical key).
2. Cycle the ignition from OFF to RUN (not start) and back to OFF a specified number of times within a defined interval. The exact count and timing vary by model — Buick Century models typically require a different cadence than GMC Canyon trucks.
3. When the BCM enters learn mode, the door locks will cycle (lock then unlock) as confirmation.
4. Within 30 seconds of the confirmation cycle, press and hold the lock and unlock buttons on the new remote simultaneously until the locks cycle again, confirming that the remote has been stored.
5. Repeat step 4 for any additional remotes. Most of these BCMs store up to four transmitter IDs.
6. Turn the ignition to RUN to exit learn mode.

If the on-board method is not available — for instance, if the BCM has been replaced or reprogrammed — a GM-compatible scan tool such as a Tech 2 or an aftermarket equivalent with BCM access is needed. Automotive locksmiths routinely carry the necessary equipment and can complete the pairing in a few minutes.

Battery and Maintenance

The Bosma remote uses a standard coin-cell battery, typically a CR2032 or equivalent, housed behind a snap-fit rear cover. Replacing the battery does not erase the programmed rolling-code pairing; the fob retains its learned identity through a non-volatile memory chip on the internal circuit board. Battery life under normal use — roughly 10 to 15 button presses per day — generally falls in the two- to three-year range.

Signs of a weakening battery include reduced operating range, inconsistent lock response, and the need to press buttons multiple times. Swapping in a fresh cell restores full range immediately. If the fob still fails after a battery change, inspect the contact springs inside the battery compartment for corrosion or misalignment before assuming a board-level failure.

OEM vs. Aftermarket Considerations

Bosma Enterprises manufactures this remote as an aftermarket alternative to the original GM part. The FCC ID L2C0007T is shared with the OEM transmitter, which means the radio module inside meets the same Federal Communications Commission certification for power output, frequency tolerance, and spurious-emission limits. From the BCM’s perspective, the handshake protocol is identical — the vehicle cannot distinguish between the original-equipment remote and this replacement unit.

Aftermarket pricing for the fob is typically a fraction of what a dealership parts counter charges for the OEM version. For vehicle owners maintaining older GM trucks and sedans, this cost difference is significant, especially when programming multiple remotes for family members.

When to Call a Locksmith

While the on-board programming method is accessible to many vehicle owners, a professional automotive locksmith adds value in several scenarios. If the vehicle only has one working key and that key is worn or unreliable, a locksmith can cut a replacement mechanical key at the same appointment. If the BCM does not respond to the self-programming sequence — a common issue on higher-mileage Oldsmobile Intrigue and Pontiac Grand Prix models with corroded ignition switches — scan-tool access is the fastest resolution. A locksmith can also verify that the correct FCC ID is being used, test the remote’s 315 MHz output with a frequency counter, and confirm that the BCM has not reached its maximum stored-transmitter limit.