Dorman 99423ST Keyless Entry Transmitter

Keyless Entry Remote for GM SUVs

Dorman 99423ST is a black keyless entry transmitter that matches the appearance and function of the original key fob on specified GM vehicles. It is built as a premium replacement or spare remote for Chevrolet Tahoe, Chevrolet Suburban 3500 HD, GMC Yukon, and GMC Yukon XL applications with OE FCC ID HYQ1AA.

Key Features

• Black key fob with 6 buttons
• Remote start function included
• Batteries included
• Requires programming with a compatible scan tool
• Electronic chip type: 46 Philips Hitag 2
• OE FCC ID: HYQ1AA
• Length: 4.625 in., width: 2.875 in., height: 2.125 in.

Detailed Description

This Dorman keyless entry transmitter is engineered to mirror the original remote’s look and operation for select Chevrolet and GMC models. Part number 99423ST is a direct-fit style replacement for vehicles that use OE FCC ID HYQ1AA, including 2015-2020 Chevrolet Tahoe, 2015-2020 GMC Yukon, 2015-2020 GMC Yukon XL, and 2016-2019 Chevrolet Suburban 3500 HD. This part cross-references GM 1066 SMARTKEY and HYQ1AA for the same application.

The remote uses a 46 Philips Hitag 2 electronic chip and includes remote start capability. Because programming is required, pairing must be completed with a compatible scan tool by a qualified professional with the proper equipment. Dorman 99423ST is a practical choice when replacing a worn, damaged, or missing key fob on GM full-size SUVs.

What It Helps Solve

• Lost or misplaced keyless entry remote
• Cracked or worn key fob housing
• Buttons that no longer respond consistently
• Need for a spare remote for a Chevrolet Tahoe or GMC Yukon
• Remote start or lock/unlock function loss on HYQ1AA-equipped vehicles

Installation Notes and Tips

Programming is required before use. Pair the transmitter with a compatible scan tool and follow the vehicle-specific procedure for the listed Chevrolet Tahoe, GMC Yukon, GMC Yukon XL, and Chevrolet Suburban 3500 HD applications. Verify the OE FCC ID and chip type before ordering to confirm match-up with the original remote.

Quality Assurance

Dorman supplies this transmitter as a premium-grade replacement built to match the original remote’s form and function for the specified applications. Professional setup is recommended to ensure proper pairing and operation.