Cadillac STS 1st generation (2005–2011) — Key Programming Reference
- Difficulty
- easy
- Lishi / lockout
- B111
Key fobs & transponder keys (4 variants)
| Key | Years | FCC ID | P/N | Chip | Freq | Battery | Blade |
|---|---|---|---|---|---|---|---|
| 315 MHz · M3N65981403 | 2005–2007 NA + LHD Europe/GCC export (Keyless Access trims) | M3N65981403 | 15212382 | Philips ID46 (GM Circle Plus, in-fob proximity transponder) | 315 MHz | CR2032 | n/a |
| 315 MHz · M3N5WY7777A | 2008–2011 NA + LHD Europe/GCC export (Keyless Access trims) | M3N5WY7777A | 25943676 | Philips/NXP PCF7952E — ID46 (GM Circle Plus, in-fob proximity transponder) | 315 MHz | CR2032 | B111 / B106 |
| transponder · B111-PT | 2005–2011 — base-trim ignition key + Keyless Access emergency/valet blade | n/a | 23372322 | Philips ID46 (GM Circle Plus / PK3) | n/a | n/a | B111-PT |
| 315 MHz · OUC6000066 | 2008–2011 — base-trim STS without Keyless Access | OUC6000066 | 20998255 | none | 315 MHz | CR2032 | n/a |
Programming procedures
What the job needs
- Add a key: 1 existing working key required.
- All keys lost: no existing working key needed.
- PIN / security code: required — NASTF + Lonsdor + BCM PIN.
- Online / server access: not required (offline programming).
- On-board (no tool) sequence: not available — Cadillac STS GM PK3+ requires professional OBD tool — no self-programming procedure.
- On site: engine off · Maintain 12V+ · Clear SECURITY/IMMO DTCs.
- Bring: Photo ID + vehicle registration. VIN cross-check before start.
Tool coverage
Documented for this case on: Autel IM608 Pro II · Autel IM508S · Autel KM100 · Xhorse Key Tool Plus · Xhorse Key Tool Max Pro · Lonsdor K518 Pro / K519 · OBDSTAR X300 DP Plus · AutoProPad G2/G3 · Advanced Diagnostics Smart Pro · Launch X431 IMMO Elite / IMMO Plus. Step-by-step menu paths for each tool are in the app.
Notes & cautions
- This chassis Cadillac STS uses GM PassKey III / III+ (2005-2011) with Texas 4C transponder. Lonsdor K518 USA + GM adapter (strong PK3 coverage), Autel IM608 + IMKPA GM, AD Smart Pro ADS178 GM. BCM PIN via OBD; NASTF lookup on some VINs.
- GM smart proximity or remote head key: ensure existing key fob battery is functional before starting.
- Verify chip before booking (this chassis facelift): GM spans Passlock (pre-2008 econoline) → PK3/PK3+ (2000-2010 Cadillac/Chevy) → HITAG-2 (2010-2016) → HITAG-AES Global A (2017-2019) → Global B (2020+ NASTF VSP SAC required). Mid-cycle K2XX/T1XX facelifts swap chip — confirm transponder ID from a working key with Lonsdor K518 reader before quoting.
- Tool kit context: Autel IMKPA GM module is the dominant add-key accessory (~$5-15/session for Global B cloud). AD Smart Pro ADS178 also strong GM. Lonsdor LKE Smart Key Emulator for K518 simulated-key flow. Xhorse KH100 + GM module. APB112 simulator, G-Box bench EEPROM NOT typically needed. XP400 PRO only for BCM EEPROM bench fallback.
- All existing keys erased. Bring ALL replacement keys before starting — minimum 2.
- No manual AKL for Cadillac STS GM PK3+ — professional tool mandatory.
- AKL for GM PK3+ needs PIN (NASTF / BCM read / Tech 2 dealer) + Global B needs NASTF VSP SAC.
- Keep all existing/lost key fobs at least 10 metres from vehicle during AKL.
- AKL accessory needs: NASTF VSP SAC for Global B chassis (mandatory); Autel IMKPA + GM token, Lonsdor LKE Smart Key Emulator for K518 simulated-key AKL path, Xhorse KH100 GM. APB112 simulator NOT mandatory. G-Box bench EEPROM NOT used. XP400 PRO only if BCM EEPROM corrupted (rare).
Lockout
Door pick / decode: Lishi B111 (CW).
74 verified sources · Last verified: 2026-08-10
Open full case in KeyAssist →Step-by-step tool menu paths, verified source links and video guides for this case are in the KeyAssist app — free to start, works offline.