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  1. Transmission Problems (TCC, Shifting)

    OEM Issues
    Hi All, For my first post here, I'd like to get some input on what I might be dealing with. I got my 08 Trailblazer LT (4.2) about a year ago, and ever since I've been dealing with the TCC intermittently locking/unlocking over and over, along with some other shifting issues. The TCC...
  2. Fan Sound At and During Shifting

    OEM Issues
    I have a 02 Trailblazer with I6 and automatic tranny with 98xxx miles. When the vehicle is cold I have a whining sound (kind of like a fan rubbing up against something which sounds like it is coming from the Tranny) that starts just before shift and last through the shift. As the vehicle...
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