2021 Cadillac XT4
Expert Key Replacement Service in Ventura County
Licensed & Insured | Mobile Key Experts
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2021 Cadillac XT4
Key Options
Licensed, insured, and backed by 1,000+ five-star reviews
All Cadillac XT4 Keys Lost? Compare Options
Lost all your keys? Compare your options
2021 Cadillac XT4 Smart key Replacement - Fast, Affordable & Professional
A customer at the Elks lodge in Ventura told me he'd already paid another locksmith for a 2021 Cadillac XT4 key that never started the car. The engine cranked but the immobilizer killed fuel after two seconds every time. The other locksmith said the body control module was bad and left.
The BCM was fine. The locksmith hadn't completed GM's full key learning procedure. Cadillac's immobilizer requires a specific security sequence that includes a timed learn cycle. If you skip steps or lose power mid-sequence, the key writes temporarily but doesn't commit to the module's permanent memory.
I used my GM Z Lishi to verify the blade cut was at least correct, then connected through OBD. I cleared the failed key data, ran a clean learn with the full security timer, and confirmed the new key was permanently stored. His key, FCC ID HYQ2ES, started the engine clean with no fuel cutoff on three consecutive tests. I showed him the IM608 confirmation screen proving the key was permanently registered.
He paid me 319. Dealer charges 582 for the same work. He'd already paid the first locksmith too, which I couldn't help with. But I could make sure the job was actually done right.
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“A+ service at an even better price. Tim was a lifesaver. I lost my original and only key for my Audi and he was willing to come to my location at 8pm the same day. He worked fast, communicated clearly, and made sure everything worked before leaving.”
“My Sprinter van key broke and I was stranded. Marco was very friendly and helped me get three new keys quickly. I will definitely be using them again.”
“Niv showed up, did his thing, and just like that I had two new keys for a fraction of what the dealership quoted. I have zero reservations recommending him to anyone who needs car keys replaced.”
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