Cadillac XT6 Key Fob Programming

Updated 2026 2020 1 model year

Programming steps, the battery it takes, and the exact replacement fob for every Cadillac XT6 model year we cover (2020). Find your year in the table, then jump to the details for that generation.

Shop Cadillac XT6 key fobs on Amazon Match the FCC ID for your year (table below) before you buy.

Every Cadillac XT6 model year

Key fob programming method, fob type and battery for each Cadillac XT6 model year
Year	Programming	Key fob	Battery
2020	GM Smart Key Programming for Push-Button Start	Proximity Key · 5-button	CR2032 battery on Amazon

2020 Cadillac XT6

How to program your key fob

If your GM vehicle (Cadillac, Chevrolet, Buick) has push-button start, you can program smart keys yourself. Use Method A if you have two working smart keys; use Method B if you have one or none. Up to 8 smart keys — read the steps through first.

Full steps: GM Smart Key Programming for Push-Button Start

Replacement key fobs

Find your key type below, then match the FCC ID printed on the back of your existing fob — or, for a plain transponder key, the blank code — to be sure of the right part.

Proximity Key

2 versions

Stays in your pocket — the car unlocks and starts without inserting a key.

5-button Proximity Key

Find on Amazon

FCC ID: HYQ2EB
OE part #: 13510245, 13544041, 13580799, 13598516, 13598527, 5942489
Frequency: 433 MHz
Chip: PHILIPS ID 46

5-button Proximity Key

Find on Amazon

FCC ID: HYQ2ES
OE part #: 13522879, 13544052, 13547851, 13564995
Frequency: 433 MHz
Chip: PHILIPS ID 46

Photos show the OEM part for each number listed. Aftermarket replacements sold online are often slightly different in appearance — the FCC ID, not the shape, is what determines whether a fob will work with your car.

Cadillac XT6 key fob battery

Your Cadillac XT6 key fob uses a CR2032 3V lithium coin cell. A fresh one typically lasts 3–5 years.

Buy Energizer CR2032 Lithium Coin Batteries (4-pack) on Amazon

How to replace the battery

1 Slide the release latch and pull the metal emergency key out of the fob.
2 Use that key (or a coin) to pry the two halves apart at the seam.
3 Lift out the old coin cell — note which side faces up.
4 Drop in the new battery the same way (printed + side usually faces the back cover).
5 Press the case back together until it clicks, then test lock/unlock and push-to-start.

Battery tips

Use a fresh, name-brand 3V lithium cell — bargain cells drain quickly.
Even with a dead fob battery you can usually still start the car by holding the fob against the start button — check your owner's manual.
If the fob still won't work after a new battery, it may need re-syncing or programming.

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