Strattec Smart Key Fob (FCC ID HYQ1AS) – GM Proximity Key

By Mohammad H. Abdelhadi, ALOA-Certified Master Locksmith, mobile automotive locksmith. Reviewed by Ray Obar, Master Locksmith. Updated June 1, 2026.

Designed as a proximity-based smart key for select General Motors vehicles, the Strattec Smart Key Fob (FCC ID HYQ1AS) enables passive entry and push-to-start functionality. This unit is registered under FCC ID HYQ1AS, which identifies its RF transmission profile and regulatory compliance. The Strattec Smart Key Fob (FCC ID HYQ1AS) is manufactured by Strattec Security Corporation, a long-established OEM supplier of lock and key components to major automakers. It serves as a direct-fit replacement for GM proximity key systems, and a correctly enrolled fob will communicate seamlessly with the vehicle’s body control module to authorize ignition and door lock operations.

Vehicle Compatibility

Based on verified fitment data, this smart key is confirmed compatible with the following vehicle:

• GMC Terrain — model years 2018 through 2024

The GMC Terrain across this production range uses a proximity-based ignition system that pairs with the Strattec Smart Key Fob (FCC ID HYQ1AS). However, because this FCC ID may cover additional GM variants beyond the confirmed fitment above, vehicle owners should always cross-reference their existing key’s FCC marking before ordering a replacement. The FCC ID is typically printed on the back housing of the original fob or listed in the vehicle’s owner manual.

Important Notes on Specifications

While some aftermarket databases associate specific transponder chip part numbers and operating frequencies with this fob, the confidence level on certain internal specifications has not been independently verified to a high degree. Rather than present unconfirmed chip or frequency details as fact, it is more responsible to note that the device follows GM’s standard proximity key architecture used across its 2018-and-newer platform. Automotive locksmiths working with this unit should consult their programming tool’s application guide — tools such as the Autel IM608 Pro, Smart Pro, or AutoProPad will typically identify the correct transponder protocol automatically once the vehicle’s make, model, and year are selected.

Programming and Enrollment

Enrolling a new smart key to a GM vehicle in this generation generally requires a diagnostic programming tool capable of communicating with the body control module. On-board programming (using existing working keys to add a new one) is not supported for proximity smart keys on most GM platforms — a professional-grade tool or dealer-level scan tool is needed to write the new key’s credentials into the BCM.

For the GMC Terrain specifically, the programming procedure involves accessing the vehicle’s immobilizer module, initiating a key learn sequence, and confirming the fob’s transponder registration. The process typically takes under ten minutes when performed by an experienced locksmith with the correct equipment. After enrollment, the fob should be tested for all functions: passive unlock on approach, passive lock on walk-away, push-button ignition, and remote panic activation.

OEM vs. Aftermarket Considerations

Strattec Security Corporation is an original equipment manufacturer, meaning this fob is produced to the same specification as the key originally supplied with the vehicle. This distinction matters because aftermarket proximity keys — while often functional — can vary in shell quality, button feel, and long-term signal reliability. An OEM-grade unit from Strattec will match the factory key in RF performance and physical dimensions.

That said, aftermarket alternatives using the same FCC ID do exist and can be a cost-effective option. Locksmiths should verify that any aftermarket unit carries the correct FCC ID (HYQ1AS) and confirm transponder compatibility with their programming tool before completing a job.

When to Contact a Locksmith

If a GMC Terrain owner has lost all proximity keys, a locksmith with GM key programming capability can generate and enroll a replacement without a tow to the dealership. The all-keys-lost scenario requires the technician to perform a pincode-based or EEPROM-based procedure depending on the tool and the vehicle year. Owners with at least one working key will find the process faster and typically less expensive, as the existing key can be used to authorize the addition of a new fob.

Related help: GMC auto locksmith, car key replacement, car key programming.

Compatible and related keys: Strattec Smart Key Fob (FCC ID HYQ1ES).