rough idle/Stalling

[Kevinreitan]

About two weeks ago my engine light came on with a code of P0446. I took the truck into my dealer and they diagnosed a faulty fuel tank pressure sensor, and replaced it. the light has not come back on and the truck was running like normal. This morning when i started it the idle seemed a little off but nothing really bad, about half way to work it started idling really rough at stop lights then stalled once coming off a red light.

 

Any ideas? I am planning on taking it back in if its doing the same after work.

 

2003 Silverado 4.3.

 

 

[Kevinreitan]

Update after taking the truck back in. the rough idle and stalling were unrelated to the fuel tank work i had done in sept. They ended up replacing the cap and rotor under a recall notice.