• If you currently own, previously owned or want to own an Avalanche, we welcome you to become a member today. Membership is FREE, register now!

oil consumption

  1. S

    AFM oil consumption fix

    I own a 2011 Avalanche LS that has AFM system on 5.3L V8. It currently has about 120k miles. My first sign of trouble was a misfire code caused by a fouled #1 cylinder spark plug. I replaced all the plugs. The same plug fouled again within 10 months. I replaced it again. (Both times the loss of...