Cadillac CT4 Key Replacement | S.A. Locksmith San Antonio

Cadillac CT4 Locksmith San Antonio

S.A. Locksmith & Security provides professional Cadillac CT4 key and key fob replacement in San Antonio, Texas and surrounding areas including Alamo Heights, Stone Oak, The Dominion, Helotes, Converse, Schertz, Cibolo, New Braunfels, and Boerne. As a licensed and insured mobile locksmith, we come directly to your location — home, work, or roadside — for fast, same-day service. Our technicians use GM Tech2, SPS, and CTS/ATS smart key programming tools to cut and program your Cadillac CT4 key at a fraction of dealership pricing. Available 24/7 for emergencies. Call (210) 348-3677 for a free quote.

Licensed (LIC# B18010), insured, and BBB A+ rated, S.A. Locksmith & Security has been serving San Antonio since 2009. We back all work with a 90-day warranty on parts and labor plus manufacturer warranty on all hardware. Our no-damage guarantee means your vehicle is always safe in our hands. With response times under 20 minutes throughout San Antonio, we’re your fastest alternative to the dealership — at a fraction of the cost.

Cadillac CT4 Key & Key Fob Replacement San Antonio

S.A. Locksmith & Security provides professional Cadillac CT4 key and key fob replacement and programming services in San Antonio, Texas. Our certified automotive locksmiths specialize in GM GM Proximity Smart Key (Hitag 3 AES) systems, offering complete key cutting, transponder programming, and smart key fob replacement for all CT4 model years (2020-Present). We serve San Antonio, New Braunfels, Schertz, Cibolo, and surrounding areas with mobile locksmith service.

Cadillac CT4 Technical Specifications & Key Information

Year Range: 2020-Present
Engine: 2.0L Turbo I4 (LSY) / 2.7L Turbo I4 (L3B CT4-V) / 3.6L Twin-Turbo V6 (LF4 CT4-V Blackwing)
Fuel Type: Petrol
ECU / Computer: AC Delco E80 (LSY/L3B Turbo) / AC Delco E92 (LF4 Twin-Turbo V6)
Immobilizer System: GM Proximity Smart Key (Hitag 3 AES)
Key Type: Smart Key Proximity Fob with HU100 Emergency Blade
Key Blank / ILCO: HU100 — ILCO: EK3P-HU100/EK3LB-HU100 / OEM# 13538860
Transponder Chip: Hitag 3 AES
Start Method: Push-Button Start

Cadillac CT4 Key & Fob Services

Cadillac CT4 Key Cutting — Professional key cutting for all CT4 key blanks
Cadillac CT4 Key Programming — Full transponder and smart key programming
Cadillac CT4 Key Fob Replacement — OEM-quality remote key fob replacement and programming
All Keys Lost — Emergency key replacement when you have no working key
Emergency Lockout Service — 24/7 Cadillac CT4 lockout assistance in San Antonio
Ignition Repair & Replacement — Fix stuck or worn ignition cylinders
GM Passlock / Passkey / VATS Reset — Bypass and reprogram GM anti-theft systems
Duplicate Key Service — Get spare keys made while you wait
Mobile Service — We come to your location anywhere in the San Antonio area

Cadillac CT4 ECU & Module Services

The Cadillac CT4 uses the AC Delco E80 (LSY/L3B Turbo) / AC Delco E92 (LF4 Twin-Turbo V6) engine control unit. S.A. Locksmith & Security offers comprehensive ECU and electronic module services for the CT4, including cloning, programming, and repair of all GM control modules.

Why Choose S.A. Locksmith for Your Cadillac CT4?

S.A. Locksmith & Security has been serving San Antonio and surrounding areas for over 15 years. Our GM-certified technicians understand every generation of Cadillac CT4 security systems — from classic VATS resistor keys to modern proximity smart key technology. We carry a complete inventory of GM key blanks and transponder chips, allowing us to provide same-day service for most Cadillac models.

Unlike dealerships that require towing and long wait times, we come to you with our fully-equipped mobile locksmith units. Our competitive pricing, fast service, and expertise in GM anti-theft systems make us the preferred choice for Cadillac key replacement in San Antonio.

Our No-Damage Guarantee: Unlike towing your vehicle to a dealership, our mobile locksmiths use professional-grade, non-destructive tools and techniques to service your vehicle on-site. We guarantee no damage to your vehicle during any lockout, key replacement, or programming service. With response times under 20 minutes throughout the San Antonio area and 24/7 emergency availability, we get you back on the road fast — backed by our 90-day warranty on parts and labor.

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Cadillac CT4 Key & Key Fob Replacement FAQ

How much does a Cadillac CT4 key replacement cost?

The cost of a Cadillac CT4 key replacement varies depending on the key type and year model. Standard transponder keys typically range from $150-$220, while smart key fobs with proximity can range from $250-$400. VATS resistor keys for older models are typically $80-$120. S.A. Locksmith & Security offers competitive pricing — call (210) 348-3677 for an exact quote.

Can you program a new key for my Cadillac CT4 if I lost all keys?

Yes! S.A. Locksmith & Security specializes in all-keys-lost situations for the Cadillac CT4. Our technicians can program new keys from scratch using advanced diagnostic equipment, bypassing the need for a dealer visit. We handle VATS, Passkey III, PK3+, and GM proximity systems used in Cadillac vehicles.

How long does it take to replace a Cadillac CT4 key?

Most Cadillac CT4 key replacements take 30-60 minutes depending on the key system. Standard VATS and transponder keys are typically faster, while proximity smart key fobs may take slightly longer due to programming requirements. We offer mobile service throughout San Antonio.

Do I need to go to the Cadillac dealer for a key replacement?

No! S.A. Locksmith & Security can handle all Cadillac CT4 key services — often at 30-50% lower cost than the dealership with faster turnaround. We have the same GM programming capabilities as the dealer for VATS, Passkey III, PK3+, and proximity smart key systems.

What immobilizer system does my Cadillac CT4 use?

Cadillac CT4 vehicles use GM anti-theft systems depending on the year model. These include VATS (resistor pellet key), Passkey III/PK3+ (transponder-based with Philips 46/Megamos 48 chips), and GM Proximity (smart key with Hitag 2/3 transponders). Our technicians can identify your exact system and provide the correct key solution.

Request a Locksmith

S.A. Locksmith & Security is a full-service, 24/7 locksmith located in San Antonio serving the greater SA area. No project is too big or too small.

📞 (210) 348-3677

We Accept All Major Credit Cards

Note: Pricing and availability may vary. Smart key programming requires professional equipment. Some services may require vehicle VIN verification. All work is backed by our 90-day warranty on parts and labor and manufacturer warranty on hardware. S.A. Locksmith & Security — Licensed (LIC# B18010), Insured, BBB Accredited (A+ Rating). 11401 West Ave, San Antonio, TX 78213. All brand names, logos, and trademarks are the property of their respective owners. S.A. Locksmith & Security is an independent locksmith service provider and is not affiliated with any automobile manufacturer or dealership. 10% Military & Veteran Discount — show valid military ID at time of service.

Need Cadillac CT4 Key & Key Fob Replacement in San Antonio?

Contact S.A. Locksmith & Security today for professional Cadillac key and key fob replacement services. We serve San Antonio, New Braunfels, Schertz, Cibolo and surrounding areas with 24/7 emergency locksmith service.