What year ranges does this guide cover?

This Cadillac CT6 Key Fob guide covers the source-backed year clusters 2016 and 2017u20132020 only.

Does this guide program the remote only or also the transponder?

This page is limited to in-vehicle learning steps confirmed by DIC prompts and does not attempt to cover immobilizer diagnosis or broader security programming beyond the on-screen learning workflow.

What if the programming steps do not work?

If the expected DIC message checkpoint does not appear for the step being performed, stop and restart from the beginning with attention to timing, or switch to professional help.

When should I switch from DIY to locksmith help?

Switch when the required DIC prompts do not appear after careful attempts, when the erase risk is unacceptable, or when the no-recognized-transmitter method is needed in Canada (where that feature is not available).

Can I use a replacement key or fob and still need programming?

Yes. A replacement Cadillac CT6 Key Fob transmitter typically still needs to be learned by the vehicle using the supported in-vehicle steps (when prerequisites are met) or by a professional workflow when those steps are not supported.

Cadillac CT6 Key Fob Programming by Year

Can you program a CT6 fob without the dealer? For most years, yes. Pick your year for the route and best next step.

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Find your year

Year	DIY onboard?	How it programs	Working fob?	Erase risk	Confidence	Best next step
2016	Yes	Yes - onboard relearn	No (all-keys-lost OK)	Possible	Med	Follow the steps below
2017–2020	Yes	Yes - onboard relearn	Varies	Yes	High	Follow the steps below

Cadillac CT6 key types & programming facts

All 2016-2020 Cadillac CT6 models in the U.S. and Canada use a smart proximity push-to-start key fob with an emergency mechanical key blade for door access. Replacement fobs can be added by onboard programming procedures when at least two working fobs are available, or by a professional using diagnostic equipment if fewer are present. The new fob must be compatible with the CT6 (correct FCC ID and part reference) and then synchronized to the vehicle’s immobilizer and keyless entry system.

Key types used on the CT6:

smart/proximity push-to-start key fob with emergency insert key (2016-2020)

Common fob FCC IDs: HYQ2EB — check the back of your fob; we confirm the exact variant on site.

2016 Cadillac CT6

Route verified — exact steps vary by trim/equipment

Route verified as onboard programming (no dealer needed). The sequences below are general route guidance — use them only if your vehicle shows the same prompts and controls. If the prompts don’t match, stop and call us.

Show the programming methods (20 steps)

Vehicle and Materials Prep

Programming step

1 Vehicle must be off and all transmitters (recognized and new) present.

Programming step

2 Vehicle key to be removed from the recognized transmitter or transmitter before procedure.

Programming step

3 Center console storage area opened and rubber mat removed to access transmitter pocket.

Programming step

4 Key lock cylinder cap on driver door handle removed to access key cylinder.

Programming step

5 Procedure without a recognized transmitter takes approximately 30 minutes and not available in Canada.

Programming with a Recognized Transmitter

Programming step

1 Place recognized transmitter(s) in the cupholder before programming.

Insert the key

2 Insert vehicle key into driver door key lock cylinder and turn counterclockwise to unlock five times within 10 seconds.

Programming step

3 DIC displays "READY FOR REMOTE #2, 3, 4, ETC" when ready to learn additional transmitters.

Press / hold a fob button

4 Place new transmitter into transmitter pocket, then press ENGINE START/STOP to learn it; DIC confirms when learned.

Press LOCK + UNLOCK

5 Remove transmitter and press unlock or lock to complete; repeat for additional transmitters and hold ENGINE START/STOP ~12 seconds to exit programming mode.

Programming without a Recognized Transmitter

Remove the key

1 Remove vehicle key from transmitter and remove driver door key lock cylinder cap.

Insert the key

2 Insert key and turn counterclockwise to unlock five times within 10 seconds; DIC displays "REMOTE LEARN PENDING, PLEASE WAIT."

Hold fob to START button

3 Wait 10 minutes until DIC displays "PRESS ENGINE START BUTTON TO LEARN," then press ENGINE START/STOP; repeat this press-wait sequence three times.

Programming step

4 After third sequence, all previously known transmitters no longer work; DIC displays "READY FOR REMOTE # 1."

Press LOCK + UNLOCK

5 Place new transmitter into transmitter pocket, press ENGINE START/STOP to learn, remove and press unlock/lock; repeat for additional transmitters and hold ENGINE START/STOP ~12 seconds to exit.

Post-Programming Steps and Limits

Programming step

1 To program additional transmitters, repeat the learn steps for each transmitter as prompted by the DIC.

Press / hold a fob button

2 Press and hold ENGINE START/STOP for approximately 12 seconds to exit programming mode after all transmitters programmed.

Programming step

3 Up to eight transmitters can be programmed when no recognized transmitter is available.

Turn ignition to ON

4 Return the vehicle key back into the transmitter after programming completion.

Programming step

5 Previously known transmitters will be erased during the three-step learn sequence when starting without a recognized transmitter.

Keys & fobs that fit the 2016 CT6

Strattec Smart Key Fob (FCC ID HYQ2EB)Smart KeyView fob →

For the 2016 CT6: CT6 key replacement & all compatible fobs →

2017–2020 Cadillac CT6

Route verified — exact steps vary by trim/equipment

Show the programming methods (15 steps)

Programming with Recognized Transmitters (steps summary)

Programming step

1 Requirement: two recognized transmitters present and new transmitter(s) with user

Remove the key

2 Remove vehicle key from recognized transmitter, place two recognized transmitters in cupholder

Remove the key

3 Remove driver door key lock cylinder cap and turn vehicle key counterclockwise to unlock position five times within 10 seconds to prompt DIC

Programming step

4 Place new transmitter in center console transmitter pocket after removing rubber mat

Press / hold a fob button

5 Press ENGINE START/STOP to learn transmitter; DIC indicates readiness for additional transmitters; press and hold ENGINE START/STOP ~12 seconds to exit

Programming without Recognized Transmitters (steps summary)

Programming step

1 Procedure allows programming up to eight transmitters; approximate duration 30 minutes

Remove the key

2 Remove vehicle key from transmitter and remove driver door key lock cylinder cap

Insert the key

3 Insert vehicle key and turn counterclockwise to unlock position five times within 10 seconds; DIC displays REMOTE LEARN PENDING, PLEASE WAIT

Hold fob to START button

4 Wait 10 minutes until DIC displays PRESS ENGINE START BUTTON TO LEARN, then press ENGINE START/STOP; repeat this press sequence three times to erase previous transmitters and display READY FOR REMOTE #1

Press LOCK + UNLOCK

5 Place new transmitter in center console transmitter pocket, press ENGINE START/STOP to learn each transmitter, press unlock/lock on transmitter after removal; press and hold ENGINE START/STOP ~12 seconds to exit when finished

Additional operational details and notes

Hold fob to START button

1 DIC messages used: READY FOR REMOTE #2, 3, 4, ETC.; REMOTE LEARN PENDING, PLEASE WAIT; PRESS ENGINE START BUTTON TO LEARN; READY FOR REMOTE #1

Programming step

2 After learning, DIC displays readiness to program next transmitter

Programming step

3 When programming additional transmitters, repeat learning steps as indicated (Steps 4–6 or Steps 5–7 depending on method)

Press / hold a fob button

4 After third press in the no-recognized-transmitters procedure, all previously known transmitters will no longer work until relearned

Programming step

5 Final step for both methods: return vehicle key back into the transmitter

Keys & fobs that fit the 2017–2020 CT6

Strattec Smart Key Fob (FCC ID HYQ2EB)Smart KeyView fob →

For the 2017–2020 CT6: CT6 key replacement & all compatible fobs →

How we validate this guide

Year coverage comes from our consolidated vehicle programming dataset. Route-level programming status is reviewed against internal route sheets and available manufacturer, security-access, and professional tool references. Exact button sequences are marked source-verified only when we have year/equipment-specific support; where a year is labeled “route verified, steps vary,” we confirm the exact fob, trim, and prompts before programming. Reviewed for route and safety by Mohammad H. Abdelhadi, ALOA-Certified Master Locksmith.

Year	Route status	Exact steps
2016	Route verified	General guidance
2017–2020	Route verified	General guidance

Common questions

What type of key does my Cadillac CT6 use?

The 2016-2020 Cadillac CT6 uses a smart proximity push-to-start key fob that includes a removable emergency mechanical key blade for manual door unlocking.

Can I program a new CT6 key fob myself?

Some 2016-2020 CT6 proximity fobs can be programmed by onboard procedures when you already have two working fobs; otherwise, programming typically requires professional locksmith or dealer equipment.

Does a replacement CT6 key fob include the metal key?

Many replacement CT6 smart fobs are sold with an emergency key blade included, but you must confirm this when purchasing, as suppliers specify whether an emergency key is included.

Can you program a CT6 key fob without going to the dealership?

For most years, yes - the route is onboard relearn or an OBD tool, both of which a mobile locksmith handles at your location.

Does this program the remote only, or the transponder key too?

It depends on your key type. Tell us your FCC ID and we will confirm.

What if my year says professional programming required?

Those years need a programmer or security access; we bring the tool to you and program it on site.

How much does it cost?

It depends on year, key type, and whether you have a working key. Call (833) 439-8636 for a firm price before we dispatch.

Need your CT6 fob programmed? We come to you, 24/7.

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