I keep getting a p0171 code

Okay I'm about to say screw the code this is what's going on when I first start my truck up in the morning it handles just fine till it warms up and then I'll be on the freeway and it'll die or start to like lug and then die any suggestions it's almost like it vapor locks my other half is convinced it's the fuel pump and for some reason on a 2009 it doesn't have a filter help

 

171 is lean. Look for a vacuum leak. Have it smoke tested by a shop

 

Yea I got that when I had a vacuum line unplugged. Might be unplugged or cracked.