Maliburay55, thanks for that info!
I'm having the same issue as being described by the OP and others. Dealer still has my truck overnight to do a cold start in the morning. I'm hoping it fails just so they can continue diagnosing and don't give me back a bad truck. If it fails and they continue to work on it, I'll recommend they replace with this part number. Thanks!
Here's my thread if interested:
http://www.gm-trucks.com/forums/topic/159012-not-starting-after-only-148-miles/