The GMC Sierra 2019-2021 uses key code series Z, with 6,314 documented codes spanning the range Z0001-Z2000, Z2001-Z4000, Z4001-Z6314. Uses a 8-cut high-security channel-track profile. Set the duplicator to flat-bottom cuts 0.1″ wide. Code is rarely stamped on this style of key; pull it via VIN through the dealer or decode the lock. The lock is decodable with a Lishi tool — sign in for the specific match.
Code prefix
Z
Code range
Z0001-Z2000, Z2001-Z4000, Z4001-Z6314
Years
2019-2021
Total codes
6,314
Lishi decodable
Yes — sign in for tool name
Cuts per key
8
Last verified
Verification pending
Common questions
What key code series does the GMC Sierra 2019-2021 use?
The GMC Sierra 2019-2021 uses key code series Z, with 6,314 documented codes ranging from Z0001-Z2000, Z2001-Z4000, Z4001-Z6314.
Can the GMC Sierra 2019-2021 lock be decoded?
Yes. A Lishi-style 2-in-1 decoder reads the door or ignition lock without disassembly, revealing the bitting code that can be cross-referenced against this series' key code database. The specific Lishi tool match for this vehicle is available to signed-in locksmiths.
How many cuts does a GMC Sierra 2019-2021 key have?
8 cuts on a high-security channel-track profile. Each cut position has a depth value documented in the bitting code, which determines the key cutting pattern.
Get the full code list — $9.99/mo, 3-day free trial.Sign in to view bittings, depths, and Lishi cut maps for this series.