Ok guys so i have some codes that i need help with. The first one is P 0551 now i'm pretty sure that has somthing to do with the power steering sensor...is that a big deal? The next one is P 1294 and i have no idea what that is. The next is P 0455 and that i think is an emissions leak gross. And i dont even know where to start looking for that leak at, I hope someone out there can help me out because i'm really tired of my truck not staying at a normal idle when i'm stopped. Thanks Guys.

 

P0551, probably the switch, but check the level just in case.

P1294 possible causes;
VACUUM LEAK
AIR INDUCTION SYSTEM
THROTTLE BODY AND THROTTLE LINKAGE
IAC DRIVER CIRCUIT OPEN

The emission code has too many possibilties.

Dang man, did that truck fall off of a bridge?

P0455

 

Sometimes i wish it would[&:] But thank you for the help.

 

For the gross emmisions leak, try checking the hoses/connections to the charchol canister. If any even look cracked, replace them. Also check the gas cap.
The canister on mine is located on the drivers side behind the cab up in the frame rails