Replace check valve if it is not operating properly.
- Use approved octane fuel for your vehicle.
- Regularly inspect the air injection system for leaks or damage.
- Can a faulty check valve damage an air pump?

GM Part #85052253
Helps prevent exhaust from entering air pump
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
24 Months/Unlimited Miles Limited Warranty for Parts (plus Labor if installed by a GM dealer)
Please visit our warranty page on Gmparts.com for full warranty details.