P0455 on Your 2024 Cadillac Escalade
A P0455 on your 2024 Escalade (5th generation GMT1XX) means a large EVAP leak. Whether you have the 6.2L V8 or 3.0L Duramax diesel, the vehicle is fully under Cadillac's premium warranty. Check the gas cap first, then let your dealer handle it.
Symptoms
- Check engine light with P0455
- P0449 companion code may appear
- Possible fuel smell
- Gas cap not seating
Top Causes
- Gas Cap Seal (Very High Likelihood): Loose or factory defect. Warranty-covered.
- EVAP Vent Solenoid Valve (Medium Likelihood): GM's known EVAP weak point. Warranty-covered.
- Purge Valve/Solenoid (Medium Likelihood): Stuck open. Warranty-covered.
- EVAP Canister (Low Likelihood): Factory issue. Warranty-covered.
- Software Calibration (Low Likelihood): ECM update. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, visit your Cadillac dealer for free warranty repair using GDS2 diagnostics.
Warranty
Your 2024 Escalade is covered by Cadillac's 4-year/50,000-mile warranty through 2028. Federal emissions (8yr/80k) extends through 2032.
Safe to Drive?
Yes. P0455 doesn't affect V8/diesel performance, 4WD, Super Cruise, Magnetic Ride, towing, or any features.