APDTY 035813 is a brand-new ignition lock cylinder assembly with Passlock security chip and two new keys, for select 1997–2005 GM vehicles including the Chevy Impala, Malibu, Monte Carlo, and Classic, plus Oldsmobile Alero, Cutlass, and Intrigue, and Pontiac Grand Am. It replaces GM numbers 12458191, 12533953, 15822350, 19168637, and 25832354.
Key Takeaways
- What it fixes: the common Security/theft-deterrent light and no-start condition caused by a failing Passlock ignition lock cylinder.
- What's included: the complete lock cylinder with Passlock chip and two new keys — ready to install.
- Fits: select 1997–2005 Chevy, Oldsmobile, and Pontiac models — verify your specific trim.
- Important distinction: if your key gets stuck in the ignition (rather than a security-light no-start), you likely need a Shift Interlock Solenoid, not this lock cylinder.
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What does the Passlock ignition lock cylinder do?
GM's Passlock system uses a resistor pellet inside the ignition lock cylinder to verify the correct key is being used before allowing the engine to start. When the lock cylinder wears out, the system can intermittently or permanently fail to recognize a valid key, triggering the Security light and preventing the engine from starting — even with the correct original key.
What are the symptoms of a failing Passlock cylinder?
A worn ignition lock cylinder with Passlock may cause:
- An illuminated Security or theft-deterrent light
- The engine cranking but not starting
- Intermittent starting problems that come and go
- The vehicle starting only after multiple attempts
If instead your key gets physically stuck in the ignition and won't turn or remove, that's typically a Shift Interlock Solenoid issue, not the lock cylinder — replacing the wrong part won't fix a stuck key.
What vehicles does APDTY 035813 fit?
APDTY product data lists APDTY 035813 as compatible with:
- 2004–2005 Chevy Classic
- 2000–2005 Chevy Impala
- 1997–2003 Chevy Malibu
- 2000–2005 Chevy Monte Carlo
- 1999–2004 Oldsmobile Alero
- 1997–1999 Oldsmobile Cutlass
- 1998–2002 Oldsmobile Intrigue
- 1999–2005 Pontiac Grand Am
It replaces 12458191, 12533953, 15822350, 19168637, and 25832354. Verify your specific year and trim against the live APDTY compatibility chart before ordering.
APDTY 035813 specifications at a glance
| Specification | APDTY 035813 |
|---|---|
| Part type | Ignition lock cylinder assembly with Passlock chip |
| Includes | Lock cylinder, Passlock chip, 2 new keys |
| Common application | Select 1997–2005 GM Chevy, Oldsmobile, Pontiac models |
| Replaces | 12458191, 12533953, 15822350, 19168637, 25832354 |
| Related issue | Key stuck in ignition suggests Shift Interlock Solenoid, not this part |
How is the ignition lock cylinder installed?
APDTY 035813 comes complete with new keys and is ready to install; full installation instructions including the key/computer relearn process are included. This is a general overview only — follow the included instructions and factory service information.
- Remove the steering column trim to access the ignition lock cylinder per the vehicle's procedure.
- Remove the old lock cylinder from the steering column housing.
- Install APDTY 035813 into the housing.
- Perform the key/computer relearn process included with the kit so the vehicle recognizes the new Passlock chip.
- Reassemble the column trim and verify the Security light clears and the engine starts normally.
Frequently asked questions
What does APDTY 035813 replace?
It replaces GM ignition lock cylinder numbers 12458191, 12533953, 15822350, 19168637, and 25832354 on compatible applications.
Does it come with keys?
Yes. APDTY 035813 includes two new keys and is ready to install, with the relearn process included in the instructions.
My key is stuck in the ignition — will this fix it?
Probably not. A stuck key is more likely a Shift Interlock Solenoid issue. This lock cylinder addresses the Security light / no-start Passlock condition instead.
Fix your GM Security light and no-start condition
The Passlock-related Security light and no-start problem is one of the most common GM ignition issues from this era. APDTY 035813 gives owners a complete, ready-to-install replacement with new keys. Verify your vehicle and confirm your symptom matches before ordering.