Tracking Down P0455 on Your 2022 Chevrolet Colorado
A P0455 on your 2022 Colorado indicates the ECM found a large EVAP leak. Your 2nd-generation Colorado with the 2.5L I4, 3.6L V6, or 2.8L Duramax may still be within GM's basic warranty. Check the gas cap before heading to the dealer.
Clues
- Check engine light with P0455
- Possible P0449 companion code
- Gas cap not clicking properly
- Emissions monitor incomplete
Suspects Ranked
- Gas Cap Seal (Very High Likelihood): Loose or worn. Tighten or replace ($10–$25).
- Vent Valve Solenoid (Medium Likelihood): GM's vent solenoid. $100–$200 if out of warranty.
- Purge Solenoid (Medium Likelihood): Stuck open. $80–$180.
- Vapor Line (Low Likelihood): Cracked under the bed. $80–$200.
- Charcoal Canister (Low Likelihood): Saturated. $200–$350.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 stays, visit a Chevy dealer. Check warranty status—you may be within the 3yr/36k window. Emissions warranty covers this through 2030.
Warranty Coverage
GM's basic warranty (3yr/36k) runs through 2025. The federal emissions warranty (8yr/80k) covers EVAP through 2030.
Safe to Drive?
Yes. P0455 doesn't affect the Colorado's engine, transmission, or towing.