Tracking P0455 on Your 2022 Chevrolet Trailblazer
A P0455 on your 2022 Trailblazer means the ECM found a large EVAP leak. Your Trailblazer with the 1.2L or 1.3L turbo may still be within GM's basic warranty. The gas cap is the most common cause—check it first.
Symptoms
- Check engine light with P0455
- Possible fuel odor
- Gas cap not clicking properly
- Emissions monitor incomplete
Causes 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 or disconnected. $80–$200.
- Charcoal Canister (Low Likelihood): Saturated. $200–$350.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, check warranty status and visit a Chevy dealer. 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 Trailblazer's engine, CVT, or AWD.