Help tahoe no power!!!!!!!!

[1tonchevy]

Was headed to my g/fs place to visit when all of a sudden the truck started to spit and sputter. I was on the highway doing 110km/h it lost all power and when I floored it all it did was pop and spit I could hear loud poping. Pulled over truck died out. Popped the hood and looked to see if anything was broken/leaking etc. after a few min I started the truck and it would spit and sputter but finally went back to normal. And I was on my way less than 5km down the road it started again and lost all power and left me stranded in the road. This time my engin light came on ( will put the scanner on it in the am) but it took my starting and trying to get it to move several times before it started and had enough power to limp off the road. Any ideas?

At fist I thought plugged cat but there is still a lot of exhaust comming out the tail pipe. Second I thought was bad/water in fuel but I got it from a bigger name station ( still doesn't mean it couldn't happen.) anyone have this issue? It's a 03 4.8l 2wd ppv hoe.

Thanks will post what the scanner says in the an.