Approximately a month ago I filled my truck up when it was extremely low on gas, which I never do. Went to Lowe’s and when I left from there it would barely run. Kept spitting and wanting to cut off. I limped it to the mechanic and the code showed a bad crankshaft sensor, replaced that and left. Started doing it again and the new code showed camshaft sensor, replaced it seemed fine and I left the mechanic. Did it again and went back to the place I’ve been using for years, kept bucking and showing codes. Now they are pissed and dumbfounded. Kept the truck and never showed a code and they drove it for 60 miles, they couldn’t get it to do it again. Left and it eventually started again. I put a bottle of fuel additive with a tank of 93 octane. Ran great for 2 weeks, no issues at all. Yesterday it cut off while I was attempting to go through an intersection. Finally got it to start, but would not move when I put it drive it cut off. Limped off the road and every time I tried to put it in drive, it cut off. 2 days ago I put 87 octane back in it. Myself and the mechanic are at a loss. Any help would be a great. Also, showed no codes yesterday. Really frustrating to say the least.

 

Welcome to Chevy - please post your vehicle specifics ie make model year motor etc

 

I'm having the same problem. I changed the TPS and the CPS! I have no codes but truck keeps shutting down? Not sure what to do.

 

Sounds like contaminated fuel or a failing fuel pump. The bad gas you initially put in likely clogged the filter or damaged the pump. The higher octane and additive temporarily cleaned the system enough to run, but the underlying issue returned. Have your mechanic drop the tank and inspect the fuel pump, filter, and for any water in the gas.