Mine (07 GXP) goes in for a complete replacemnet on the 3d. Dealer has been first rate so far. Told me he had a battle with GM over replacing a whole unit rather than ordering it in pieces. We'll see...

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Cheers
GMH
Mysterious GXP
May you always be topless with a full tank
NASSOA Founding Member #95
Team Solstice!! Folding@home Team