Well everyone here is the latest update to my situation. After my oil pressure issues were temporarily fixed it happened again but this time much worse!! Engine light came on and told me to shut down engine immediately! After towing to garage they tell me that my number 4 lifter collapsed and caused other damage as well and had to replace everything. So after multiple calls to Chevy Corporate and $3800 later (we split costs) I had my truck back and running great. Untilllllll, 3 weeks ago and the number 6 lifter collapsed!!! This time it was under warranty thank goodness (would have been another $1000), but truck is back and running great again. All this and still only 68, 000 miles on the truck!!!
Good luck fellow Chevy owners.