GM Transponder Key (chip ID13) – B106 Blade, Megamos Chip
Fitments for the GM Transponder Key (chip ID13) include the 2005–2010 Buick Allure, a mid-size sedan marketed under the General Motors umbrella exclusively in Canada. Across this platform, the unit handles engine immobilizer authentication through a passive anti-theft system (PASS) handshake between the key’s embedded chip and the vehicle’s body control module. Each GM Transponder Key (chip ID13) carries a Megamos-manufactured ID13 transponder pellet seated inside the bow, which must be recognized by the vehicle before the powertrain control module permits fuel injection and ignition. Owners replacing the key should expect a programming procedure that pairs the new transponder’s unique serial code with the vehicle’s immobilizer memory. When ordering a GM Transponder Key (chip ID13), confirm the B106 keyway profile to ensure correct mechanical fitment with the ignition cylinder and door locks.
Transponder Technology Inside the GM Transponder Key (chip ID13)
The ID13 transponder chip belongs to the Megamos product family, a fixed-code transponder architecture that General Motors deployed widely across its PK3 (Passlock 3) and PASS-Key III+ immobilizer systems during the mid-2000s. When the key is inserted into the ignition barrel and rotated, the immobilizer antenna ring energizes the chip through electromagnetic induction. The chip responds with its factory-programmed identification code, which the body control module cross-references against its stored key table. If the code matches a valid entry, the BCM authorizes the powertrain control module to enable fuel and spark. If it does not, the vehicle enters a security lockout, typically indicated by the theft-deterrent lamp illuminating on the instrument cluster.
Unlike rolling-code or crypto-transponder architectures found on newer GM platforms, the ID13 uses a static identification code. This means each transponder transmits the same serial number every time it is queried. While simpler in design, the system still provides effective theft deterrence because the code space is large enough to make brute-force attacks impractical within a real-world time window. Locksmiths working with this transponder should note that the Megamos ID13 is a read-only chip — once programmed at the factory, its code cannot be overwritten. Cloning is performed by reading the original chip and writing the same code to a compatible blank.
B106 Keyway and Mechanical Considerations
The B106 keyway is a standard General Motors sidebar profile used across a broad range of GM vehicles from the late 1990s through the late 2000s. It features a ten-cut sidebar design with depth and spacing values specific to the GM high-security cylinder. Cutting a replacement requires either a code card or decoding the existing lock wafers. Most automotive locksmiths stock B106 key blanks with a transponder cavity molded into the bow, ready to accept the ID13 chip.
When duplicating this key mechanically, the sidebar cuts are the primary security feature — standard pin tumbler depths are secondary. A correctly cut B106 blade will rotate the ignition cylinder to the RUN position, but without a properly programmed transponder, the engine will crank momentarily and then stall or refuse to start entirely. This two-layer security approach — mechanical sidebar plus electronic transponder — is characteristic of GM’s anti-theft strategy from this era.
Programming and Locksmith Procedures
Adding a new transponder to the 2005–2010 Buick Allure’s immobilizer memory can be accomplished through several methods depending on the tools available. Professional-grade diagnostic platforms from manufacturers such as Autel, Smart Pro, or the OEM Tech2 scanner support direct key learning through the vehicle’s OBD-II port. The procedure typically involves entering a security access mode, selecting the key learn function, and cycling the ignition with each new key to register its ID13 code.
A 10-minute relearn procedure is also documented for certain GM PK3 systems. This on-board method does not require a scan tool: the technician inserts the new key, turns the ignition to ON (without starting), and waits for the security indicator lamp to stop flashing — a process that takes approximately 10 minutes per cycle and must be repeated three times. After the third cycle, the new key should start the vehicle. However, this method requires at least one previously programmed working key in some configurations, so locksmiths should verify the specific calibration before committing to this approach.
For all-keys-lost situations on this platform, a diagnostic tool with security bypass capability is typically required. The tool must authenticate with the BCM’s security gateway, clear the existing key table, and then learn new keys from scratch. The ID13 chip’s fixed-code architecture simplifies the electronic side of this process compared to later crypto-transponder systems, but gaining security access to the BCM remains the critical step.
OEM vs. Aftermarket Key Blanks
Original-equipment key blanks for GM vehicles with the B106 profile and ID13 chip are available through dealership parts departments, though aftermarket alternatives from companies like Ilco, JMA, and Keyline offer cost-effective substitutes. When sourcing an aftermarket blank, the critical specification is compatibility with the Megamos ID13 transponder — some generic “GM transponder blanks” ship with different chip types that will not communicate with PK3-era immobilizer systems. Verifying the chip type printed on the blank’s packaging or cross-referencing the supplier’s catalog against the ID13 specification avoids wasted programming attempts.
Build quality between OEM and aftermarket blanks varies primarily in the plastic bow material and the precision of the brass blade. Higher-quality aftermarket blanks mirror the OEM’s dimensional tolerances closely, while budget options may require minor adjustment after cutting. For the transponder electronics, the chip itself is functionally identical across reputable suppliers since the Megamos ID13 is a standardized component.
Applicable Vehicles
Based on confirmed fitment data, this key is validated for the following General Motors vehicle:
- Buick Allure — model years 2005, 2006, 2007, 2008, 2009, and 2010
The Buick Allure was the Canadian-market designation for the vehicle sold as the Buick LaCrosse in the United States. Owners and locksmiths cross-referencing parts catalogs should be aware of this naming difference, as some suppliers list parts under the LaCrosse name even when the vehicle’s registration reads Allure. The mechanical and electronic key specifications are identical between the two nameplates for the same model years.
Specifications and fitment
| Key type | Transponder Key |
|---|---|
| Transponder chip | ID13 |
| Chip manufacturer | Megamos |
| Keyway | B106 |
| Region(s) | USA |
| Product type | Transponder |
| Compatible makes | Buick |
Listed vehicle fitment
| Make | Model | Years |
|---|---|---|
| Buick | Allure | 2005–2010 |
Fitment must be confirmed against the existing key’s FCC ID family and the vehicle’s exact configuration before cutting or programming. VIN or photo verification may be required.
Questions and answers
Which vehicles does GM Transponder Key (chip ID13) fit?
GM Transponder Key (chip ID13) is listed to fit Buick applications such as Buick Allure. Confirm the exact year range and the existing key’s FCC ID family before ordering, since fitment can vary by trim and region.
Does GM Transponder Key (chip ID13) need programming?
Yes. Because it carries a transponder/remote function (chip ID13), it must be programmed (paired) to the vehicle’s immobilizer and, for remote functions, to the keyless-entry system. Many vehicles also require at least one working key to add a new one.
Does the blade need to be cut?
Most GM Transponder Key (chip ID13) units ship uncut and require automotive key cutting before they will turn the ignition or door lock. Cutting establishes the mechanical match; programming establishes the electronic match — both are needed.
Is GM Transponder Key (chip ID13) OEM or aftermarket?
This listing is an aftermarket-grade replacement intended to match the original key’s electronic and mechanical specification. It is not required to carry a vehicle-brand logo and should be matched by FCC ID family and chip type rather than by appearance.
Check Fitment and Key Help
Low Rate Locksmith, a mobile automotive locksmith, can confirm whether GM Transponder Key (chip ID13) matches an existing FCC ID family and coordinate cutting and programming when the vehicle configuration requires professional service. For dispatch and support, call (833) 439-8636 or email info@lowratelocksmith.com.
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