Why does my low oil pressure warning come on? on 2005 Chevrolet Tahoe

It comes on at the first start of the day or if the truck has sat for a 8 hour work day, oil level is good just recently had oil changed, seems to be running properly and there are no leaks.

by in Oklahoma City, OK on January 27, 2014
1 answer 3 comments
ANSWER by on January 27, 2014
Could be just a bad oil sending unit.
COMMENT by on January 27, 2014
I am going to go get a oil pressure switch this weekend and change , will let you know the out come thanks!
COMMENT by on January 27, 2014
U Bet, let me know.
COMMENT by on January 27, 2014
Sorry, it has been bitter cold here, so just got it switched out tonight and seems to be no change, got anymore ideas as to what it could be???