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2023 Cadillac CT4
Key Replacement - Save vs Dealer in San Diego

Trusted by 100+ Drivers

Available
2023 Cadillac CT4 Key
Key

Not all locksmiths are created equal. EZ Car Keyz is BBB A+ rated, fully licensed and insured, and trusted by thousands of customers across the area. Your vehicle is in good hands.

CA BSIS LICENSE LCO#6792
Background Checked BBB Accredited 100+ Customers
Fast Response15-25
min arrival
100+reviews
See why they skip the dealer113KSubscribers
Same-day 2023 Cadillac CT4 car key info from EZ Car Keyz Rancho Santa Fe CA
Marco Levy • EZ Car Keyz 🔥
Licensed Mobile Locksmith • San Diego, CA
15+
Yrs Exp
Same-day 2023 Cadillac CT4 car key info from EZ Car Keyz Rancho Santa Fe CA
Key specialists
Google Guaranteed
Passed Google's screening and verification process
Fixed pricing
Fully Insured
Liability coverage and background-checked technicians
Fast mobile service
8+ Years in Business
Over 10,000 keys made across the region
619 Special
10% OFFCODE:EZ-619-2026

🔥 Certified service, better price 🔥

Certified work, guaranteed discount
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2023 Cadillac CT4
Key Options

Dealer-grade key for a fair, honest price

Key
Most popular Cadillac key typeMost Popular
2023 Cadillac CT4 Key YGOG20TB1
FCC IDYGOG20TB1Part #13538860Buttons5BatteryCR2450Frequency434 MHzRemote StartYes
✓ In Stock · Programmed On-Site
Quick 2023 Cadillac CT4 transponder key cut by EZ Car Keyz Rancho Santa Fe CA
Skip the Dealer Markup
Professional key, honest rate
Quick 2023 Cadillac CT4 transponder key cut by EZ Car Keyz Rancho Santa Fe CA
🔧 PRO TIP
The 2023 CT4 runs a GM push-to-start key system that requires diagnostic access to register a new fob. No ignition-turn trick, no onboard add-a-key sequence. The process involves entering security access through the OBD port, sitting through a timed security learn, and then placing the fob in the key pocket to complete enrollment. The part that catches people is the timed wait built into the security access step. Skip it or interrupt it and the module throws a fault and you start over. Also worth knowing: the fob takes a CR2450, which is a thicker coin cell than most people keep on hand. If the push-to-start is sluggish or the range has dropped, that battery is the first thing to check before assuming anything else is wrong.
Related services: Ignition Repair · Smart Key

Verified Pro vs Dealer Process

Licensed pro vs dealer process - you choose

EZ Car Keyz
EZ Car Keyz
Dealership
Average Cost
✓ $$
✕ $$$$
Location
✓ We come to you
✕ You drive there
Wait Time
✓ 20-45 min
✕ 2-5 days
Same-Day
✓ Yes
✕ Rarely
All Keys Lost
✓ No problem
✕ Tow required
OEM Quality
✓ Yes
✓ Yes
EZ Car Keyz wins 5 out of 6
BSIS licensed with OEM quality guaranteed
Book Service (619) 876-1271

2023 Cadillac CT4 Key Replacement - Fast, Affordable & Professional

I got a call from a paint shop out in Rancho Santa Fe, over at The Crosby. A CT4 had come in for a respray, and somewhere in the process the key situation fell apart. Another locksmith had already taken a run at programming a replacement fob, hit an immobilizer fault mid-process, and left the car in a state where the push-to-start was completely dead and the module was rejecting everything.

The paint shop was apologetic when they called. That kind of call is always a little awkward because I'm walking into someone else's incomplete work, and the car is already in a fault state before I touch anything.

When I got there, the CT4 was sitting in the back of the shop looking fine on the outside. The problem was invisible. The previous attempt had locked the body control module into a fault state, and it was not going to cooperate with a standard programming sequence until that fault was cleared.

I pulled the module and worked it on my bench tool, reading the memory directly. Cleared the fault condition, rebuilt the key registration table cleanly, and then went back to the standard enrollment sequence. First clean attempt after the reset, the fob registered without complaint.

The paint shop owner watched most of it. He asked good questions and I walked him through what had gone wrong the first time, because that kind of thing can happen to a customer's car again, and now he knows what to look for before handing off to whoever gets called next.

Total time was around 90 minutes. Longer than a clean first-attempt job, but not bad considering the state the car was in when I arrived. He saved a meaningful amount compared to the dealer route, which would have also meant a flatbed and a multi-day wait.

Save vs the Dealer on Your Cadillac CT4 Key

Get your key for hundreds less than the dealer. Same quality, same result, better price.

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BSIS Licensed Locksmith - California License LCO#6792
BSIS Licensed
CA Bureau of Security & Investigative Services
NASTF Certified Automotive Locksmith - Vehicle Security Professional
NASTF Certified
National Automotive Service Task Force
Fully Insured Locksmith - Hiscox Liability and Vehicle Damage Coverage
Fully Insured
Liability & vehicle damage coverage
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Also serving: Fairbanks Ranch · Rancho Santa Fe Village · The Bridges · The Crosby

Cadillac CT4 Rapid Response, Done Right

Rapid response in the field

Emergency 2023 Cadillac CT4 car key service in Rancho Santa Fe CA
Key | Rapid On-Site Service
2023 Cadillac CT4 | San Diego
Emergency 2023 Cadillac CT4 car key service in Rancho Santa Fe CA
2023 Cadillac CT4 Key
2023 Cadillac CT4
Key | Pro Grade Service
Estimated arrival time to Rancho Santa Fe
Proven Timing
Rapid Arrival
Available Today
Service location Rancho Santa Fe
Rancho Santa Fe
Insured Service
619 Area
Same-Day Keys (619) 876-1271

Certified and Five-Star Rated

Credentials confirmed by real drivers

E
Ezra M.
Oct 2025
★★★★★

“I needed a new key for my car and Marco gave me the best quote by far. He showed up, made the new key on the spot, and everything works perfectly. Fast service and great value.”

Google Review
F
Felipe P.
Oct 2025
★★★★★

“Quick, affordable, and professional service. Marco made a new key for my motorcycle after I lost it and had me back on the road fast. Clean work, great price, and super friendly.”

Google Review
A
Alexx C.
Dec 2025
★★★★★

“I needed a car key replacement in Hillcrest and EZ Car Keyz helped me immediately. The technician programmed a new smart key right next to my car and tested every function before leaving. Fast, friendly, and very professional.”

Google Review
Watch real savings, real jobs62KFollowers
Same-day 2023 Cadillac CT4 key service review - EZ Car Keyz Rancho Santa Fe CA
“Real savings, real reviews.”
Same-day 2023 Cadillac CT4 key service review - EZ Car Keyz Rancho Santa Fe CA
5.0 out of 5 - Based on Over 100 five-star Google reviews
Best Price (619) 876-1271

Cadillac CT4 Mobile Service FAQ

Real costs, no dealer surprises

Do you use OEM or aftermarket fobs on the CT4?
We match OEM-specification fobs to your vehicle before leaving for the job. On the 2023 CT4, the fob has to be compatible with the current GM key communication protocol, and not every aftermarket blank on the market actually is. Some of the cheap ones look right on the outside but fail enrollment or drop out after a few weeks. We verify compatibility first, then program it. If you already bought a fob somewhere else, we can tell you quickly whether it will work before we attempt anything.
How long will a replacement fob last on this car?
What if the new fob stops working a few weeks after you program it?
The fob works fine for starting the car but the remote lock and unlock range has dropped noticeably. What is going on?
I bought a replacement fob online. Can you just program it for me?
Questions? Call (619) 876-1271

Cadillac CT4 Key Service Areas

Proven service in your area

📍San Diego County
San Diego County service area map
619 LOCAL LOCKSMITH
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San DiegoChula VistaOceansideEscondidoCarlsbadEl CajonVistaSan MarcosEncinitasNational CityLa MesaSanteePowayCoronado
Fast response 2023 Cadillac CT4 locksmith coverage in San Diego County CA
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2023 Cadillac CT4 Key by Licensed Pros

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Rush 2023 Cadillac CT4 key replacement by EZ Car Keyz Rancho Santa Fe CA
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