Cadillac Seville 5th generation (1998–2004) — Key Programming Reference
- Difficulty
- easy
- Lishi / lockout
- B106
Key fobs & transponder keys (3 variants)
| Key | Years | FCC ID | P/N | Chip | Freq | Battery | Blade |
|---|---|---|---|---|---|---|---|
| 315 MHz · KOBUT1BT | 1998–2000 NA | KOBUT1BT | 25656444 | none | 315 MHz | CR2032 | n/a |
| 315 MHz · KOBLEAR1XT | 2001–2004 NA (US-spec export to EU/Japan/GCC) | KOBLEAR1XT | 25695966 | none | 315 MHz | CR2032 | n/a |
| PK3 · B99-PT Megamos ID13 | 1998–2004 NA (US-spec export to EU/Japan/GCC) | n/a | 84870459 | Megamos ID13 (PK3) | n/a | n/a | B99 (Ilco B99-PT; Ilco-EZ B102 test key) — 10-cut double-sided GM PK3 keyway |
Programming procedures
What the job needs
- Add a key: no existing working key needed.
- All keys lost: no existing working key needed.
- PIN / security code: No PIN — mechanical only.
- Online / server access: not required (offline programming).
- On-board (no tool) sequence: possible for this case.
- On site: engine off · Maintain 12V+ · No DTC scan needed.
- 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 Seville (1998-2004) is pre-immobilizer — no transponder chip. The blade alone starts the vehicle. Locksmith cuts to OEM code from VIN or existing key. No chip-programming tools needed. Remote (if equipped) learned via in-vehicle key sequence per OEM service manual.
- Key/remote: ensure existing battery (if applicable) is functional before starting.
- Tool kit context: Lonsdor K518 USA + Autel IM608 Pro II + IMKPA can reprogram remote-function radio for pre-immobilizer cars if equipped. APB112 simulator, G-Box bench EEPROM, XP400 PRO, LKE Smart Key Emulator NOT applicable to mechanical-only chassis.
- Verify chip before booking (this chassis facelift): mechanical-only pre-immobilizer chassis. Some 1996-1999 facelift versions added transponder mid-cycle — confirm key has no chip with Lonsdor K518 reader before quoting.
- Cadillac Seville pre-immobilizer — no chip-level AKL. Mechanical AKL via lock cylinder rekey or new ignition cylinder if lost lock.
- Bring ALL replacement remotes (if equipped) before starting in-vehicle programming sequence.
- No professional tool needed for blade — only locksmith cut. Remote-only AKL via in-vehicle key dance.
Lockout
Door pick / decode: Lishi B106 (CW).
41 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.