[Recommended Fix] GMC Sierra 1500 is stuck with anti-theft light blinking

854 views - Last reply: April 07, 2025
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Where do I get the key code for my GMC Sierra 1500 to make a spare key?

Hello! We've developed a VIN-based tool to help you get your key code for the GMC Sierra 1500. Check it out here: VIN Key Code Generator.

Replies (5)

My GMC Sierra 1500 might finally get back on the road thanks to this.

Would love to see a video version of this for a GMC Sierra 1500.

My GMC Sierra 1500 has the same problem—any luck getting the key code?

I can’t believe I found this. Been stuck with my GMC Sierra 1500 too.

Really need the key code for my GMC Sierra 1500, thanks for sharing!

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Key Programming
Professional key programming requires: diagnostic tools to access the immobilizer system, key code software, transponder programmers, and often proprietary manufacturer equipment. Some locksmiths and all dealers have these tools.
Key Tip: Keep spare keys in a faraday bag to prevent signal amplification theft
Security Systems
An anti-theft system that prevents the engine from starting unless it detects the correct transponder chip in the key. The chip sends a unique code to the car's computer when you turn the ignition. No match = no start, even with a physically matching key.
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1) Contact a locksmith who specializes in automotive keys or your dealership 2) Provide proof of ownership (registration, title, ID) 3) They'll either cut new keys by code or reprogram your car's system 4) This is expensive ($200-$800) as the immobilizer may need resetting.
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