P0455 on Your 2024 GMC Acadia
A P0455 on your 2024 Acadia means a large EVAP leak. This all-new Acadia with the 2.5L turbo is fully under warranty. Gas cap first.
Symptoms
- Check engine light with P0455
- May see P0449 companion code
- Possible fuel smell
- Gas cap not seating
Top Causes
- Gas Cap Seal (Very High Likelihood): Loose or factory defect. Warranty-covered.
- Vent Valve Solenoid (Medium Likelihood): GM vent valve. Warranty-covered.
- Purge Solenoid (Medium Likelihood): Factory defect. Warranty-covered.
- Vapor Line (Low Likelihood): Assembly issue. Warranty-covered.
- ECM Software (Low Likelihood): Calibration for new platform. Warranty-covered.
Warranty
Your 2024 Acadia is covered by GM's 3-year/36,000-mile warranty through 2027. Federal emissions (8yr/80k) extends through 2032.
Safe to Drive?
Yes. P0455 doesn't affect the 2.5T, AWD, or any features.