Solving P0455 on Your 2024 Chevrolet Traverse
A P0455 on your 2024 Traverse means the ECM detected a large EVAP leak. Your all-new redesigned Traverse with the 2.5L turbo is fully under warranty. On a vehicle this new, a software calibration or assembly issue is possible alongside the gas cap.
Symptoms
- Check engine light with P0455
- Possible faint fuel smell
- Gas cap not clicking
- EVAP monitor incomplete
Most Likely Causes
- Gas Cap (Very High Likelihood): Loose or not seated. Tighten until it clicks.
- Software Calibration (Medium Likelihood): New platform may need ECM TSB update.
- Vent Valve Solenoid (Medium Likelihood): Factory defect. Warranty replacement.
- EVAP Line Fitment (Low Likelihood): Assembly issue. Warranty-covered.
- Purge Solenoid (Low Likelihood): Stuck open. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, visit a Chevy dealer. They'll check for TSBs on the new platform and run diagnostics—all free under warranty.
Warranty Coverage
Your 2024 Traverse is covered by GM's 3-year/36,000-mile warranty through 2027 and the federal emissions warranty (8yr/80k) through 2032. Let the dealer handle it.
Safe to Drive?
Yes. P0455 doesn't affect the Traverse's 2.5L turbo, 8-speed, AWD, or any features.