Strattec Transponder Key (chip ID13) — B107 Blade Profile Guide
Built around a B107 blade profile and an ID13 transponder chip, the Strattec Transponder Key (chip ID13) serves as the immobilizer-authenticated ignition key for select General Motors vehicles from the mid-2000s. This unit is identifiable by its uncut or factory-cut B107 keyway and a molded head housing the embedded transponder glass capsule. Inside the key head sits the ID13 chip responsible for handshaking with the vehicle’s anti-theft module during each start cycle. Compatible vehicles share GM’s Passlock-era immobilizer architecture, meaning the body control module must recognize the transponder signal before fuel delivery is authorized. A correctly enrolled Strattec Transponder Key (chip ID13) will allow seamless ignition, while an unregistered or incompatible unit will crank but fail to start. The Strattec Transponder Key (chip ID13) remains a staple SKU in locksmith inventories serving this generation of GM platforms.
Vehicle Fitments for the Strattec Transponder Key (chip ID13)
This transponder key has been validated for the following vehicles:
- Buick LaCrosse — model years 2005 through 2009
- Pontiac Grand Prix — model years 2004 through 2008
Both platforms use the B107 keyway, which is a double-sided, ten-cut key blade common across many GM passenger cars of this era. The blade’s cut depths correspond to GM’s standard spacing and depth specifications, so any automotive key machine equipped with a GM cutter wheel and the correct space-and-depth chart can originate or duplicate the mechanical portion. However, cutting alone is insufficient — the ID13 chip inside the key must be programmed to the target vehicle before the engine will start.
ID13 Transponder Chip Technical Overview
The ID13 designation refers to a fixed-code transponder chip that communicates with the vehicle’s immobilizer antenna ring mounted around the ignition cylinder. When the key is inserted and rotated, the antenna ring energizes the glass capsule through inductive coupling. The chip then transmits its stored identification code back to the immobilizer module. If the returned code matches one of the codes stored in the module’s memory, the vehicle permits engine start. Fixed-code transponders like the ID13 differ from rolling-code or crypto-based chips in that the transmitted value does not change between ignition cycles. This characteristic simplifies the cloning process for locksmiths equipped with the appropriate transponder programmer.
Because the chip operates passively — powered entirely by the antenna ring’s electromagnetic field — there is no battery inside the key head. This means the transponder function does not degrade over time in the way that a remote-entry fob battery would. The key will continue to authenticate with the vehicle’s immobilizer for the life of the glass capsule, barring physical damage to the chip itself.
B107 Keyway and Mechanical Specifications
The B107 keyway is one of the most widely used GM key profiles from the early 2000s through the late 2000s. It is a standard double-sided key with ten cut positions. Each position can be cut to one of several depth increments defined by GM’s published depth-and-space tables. Locksmiths working with this blade typically use an HPC or Ilco code machine, or a manual flat-jaw duplicator with the appropriate GM cutter.
Key origination — cutting from a key code rather than duplicating an existing key — requires the locksmith to obtain the bitting code from the vehicle’s door or ignition lock, or to decode the existing wafers. For the Buick LaCrosse and Pontiac Grand Prix, the door lock is often the easiest decode point because the sidebar wafers in the ignition cylinder can complicate direct reads.
The Strattec Transponder Key (chip ID13) is supplied as a key blank with the transponder already embedded. The locksmith cuts the blade to the correct bitting and then programs the ID13 chip to the vehicle using a diagnostic tool or dedicated transponder programmer.
Programming Procedures
Enrolling a new transponder key to the Buick LaCrosse or Pontiac Grand Prix typically involves one of two methods, depending on the locksmith’s available equipment and whether existing working keys are present.
On-Board Programming (Key Learn Procedure)
Many GM vehicles from this generation support an on-board programming sequence that does not require a scan tool. The general procedure involves:
- Inserting an existing, already-programmed key and turning the ignition to the ON position.
- Waiting for the security indicator light to turn off (approximately ten minutes).
- Turning the ignition OFF, then inserting the new key within a specified time window.
- Repeating the ten-minute learn cycle with the new key.
- The vehicle’s body control module stores the new transponder ID alongside existing keys.
This method requires at least one working key. The exact number of learn cycles and timing intervals can vary by model year, so consulting a vehicle-specific service manual or programming guide is recommended.
Scan-Tool Programming
When no working key exists — an all-keys-lost scenario — a diagnostic scan tool capable of communicating with the GM body control module is necessary. The technician connects to the OBD-II port, accesses the immobilizer module, and follows the tool’s prompts to register the new ID13 chip. Tools from manufacturers such as Autel, Drew Technologies, or the GM Tech2 platform support this procedure. PIN or security access codes may be required depending on the vehicle and the tool used.
OEM vs. Aftermarket Considerations
Strattec Security Corporation is the original equipment manufacturer for many GM key blanks, meaning this product aligns with factory specifications for blade dimensions, keyway tolerances, and transponder placement within the key head. Aftermarket alternatives carrying an ID13 chip and B107 profile exist from multiple suppliers, but blade quality and chip reliability can vary. Locksmiths who prioritize first-try compatibility often prefer Strattec blanks to avoid issues with inconsistent blade thickness or transponder alignment that can arise with lower-cost substitutes.
For vehicle owners, the distinction matters primarily in terms of long-term durability. A properly specified aftermarket key will function identically once programmed, but the physical blade may wear differently if tolerances are looser. Given that the B107 keyway interacts with GM sidebar ignition cylinders — which are sensitive to blade dimension variations — using the correct manufacturer blank reduces the risk of premature cylinder wear or intermittent no-start conditions caused by marginal mechanical engagement.
When to Contact a Locksmith
Vehicle owners driving a 2005–2009 Buick LaCrosse or 2004–2008 Pontiac Grand Prix who need a replacement transponder key should seek an automotive locksmith experienced with GM immobilizer systems. Dealership key replacement is also an option, though independent locksmiths typically offer faster turnaround and competitive pricing. The critical requirement is that the replacement key carries the correct ID13 transponder and is cut to the B107 profile — both of which are standard stock items for most mobile automotive locksmiths.
Specifications and fitment
| Key type | Transponder Key |
|---|---|
| Transponder chip | ID13 |
| Keyway | B107 |
| Region(s) | USA |
| Product type | Transponder |
| Compatible makes | Buick, Pontiac |
Listed vehicle fitment
| Make | Model | Years |
|---|---|---|
| Buick | LaCrosse | 2005–2009 |
| Pontiac | Grand Prix | 2004–2008 |
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 Strattec Transponder Key (chip ID13) fit?
Strattec Transponder Key (chip ID13) is listed to fit Buick, Pontiac applications such as Buick LaCrosse, Pontiac Grand Prix. Confirm the exact year range and the existing key’s FCC ID family before ordering, since fitment can vary by trim and region.
Does Strattec 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 Strattec 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 Strattec 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 Strattec 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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