Went out to start it a few weeks ago did nothing but crank had 2 codes P0234 and P0336 replaced the crankshaft position sensor and still nothing... Now about 3 weeks later i don't hear my lift pump buzzing when I first turn the key... Any ideas?!?! Going crazy without my truck!!

 

Sounds like the lift pump needs replaced, but the worse news it that the injector pump may also have died.