How to Program a GM:Chevy Anti Theft Key After PCM Swap

If you’ve swapped the PCM in your GM or Chevy vehicle, you may need to reprogram the anti-theft key to start the engine. This guide walks through the key relearn process often required after replacing the powertrain control module. Common on vehicles with GM’s Passlock or Passkey systems, this procedure helps reset the security system without needing expensive tools. Works on many Chevy and GM models including Silverado, Tahoe, Suburban, Impala, Trailblazer, and more. Useful for DIY repairs, engine swaps, and solving no-start issues related to security lockout. #Chevy #GM #AntiTheftKey #PCMRelearn #PasslockReset #CarSecurity #KeyProgramming #DIYCarRepair #NoStartFix