Investigating P0455 on Your 2022 GMC Acadia
A P0455 on your 2022 Acadia means a large EVAP leak. Your 2.0L turbo or 3.6L V6 is unaffected. Check for P0449 companion code. Gas cap first.
Evidence
- Check engine light on
- P0455 (possibly P0449)
- Possible fuel odor
- Gas cap issue
Causes Ranked
- Gas Cap Seal (Very High Likelihood): Loose or worn. $0–$20.
- Vent Valve Solenoid (Medium Likelihood): GM vent valve. $90–$200 installed.
- Purge Solenoid (Medium Likelihood): Sticking. $100–$220 installed.
- Vapor Line (Low Likelihood): Connection issue. $70–$190.
- Charcoal Canister (Low Likelihood): Rare. $170–$350 installed.
Warranty
Your 2022 Acadia may still be under GM's 3-year/36,000-mile warranty. Federal emissions (8yr/80k) covers EVAP through 2030.
Safe to Drive?
Yes. P0455 doesn't affect the engine, AWD, or features.