Cadillac CTS 2003-2007 Key Codes

The Cadillac CTS 2003-2007 uses key code series H, with 5,988 documented codes spanning the range H0001-H3988, O5000-O6999. Uses a 10-cut double-sided profile. Set the duplicator to flat-bottom cuts 0.1″ wide. Code is typically stamped on the original key bow or available via the VIN through the dealer. The lock is decodable with 3 Lishi tools — sign in for the specific match. Bitting data verified as of May 11, 2026.

Code prefix
H
Code range
H0001-H3988, O5000-O6999
Years
2003-2007
Total codes
5,988
Lishi decodable
Yes (3 tools) — sign in for tool name
Cuts per key
10
Last verified

Common questions

What key code series does the Cadillac CTS 2003-2007 use?
The Cadillac CTS 2003-2007 uses key code series H, with 5,988 documented codes ranging from H0001-H3988, O5000-O6999.
Can the Cadillac CTS 2003-2007 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 Cadillac CTS 2003-2007 key have?
10 cuts on a double-sided profile. Each cut position has a depth value documented in the bitting code, which determines the key cutting pattern.
When was the Cadillac CTS 2003-2007 key data last verified?
Bitting data for the Cadillac CTS 2003-2007 was last verified May 11, 2026. Verification timestamps are tracked per series, and updates appear here as locksmiths confirm code accuracy in the field.

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