Mike Koz

Um.... gasoline? Not sure how to explain what I already typed.

Found a very small fuel leak today around the rear of the intake manifold. Going to look at the HP Fuel pump now. Very recently replaced the trans fluid and filter, trans temp has been normal the entire time. Fuel mileage indicator is terrible. Normally get around 19mpg its recently been around 13 or lower since this problem started.

Hello, I have a 2014 5.3 Sierra that continues to throw O2 codes. P013C, P0158, P2273, P0430 are the most common ones I get. When accelerating there is a jerking sensation then about 2 to 3 mins after cursing the truck sounds like I hit some rumble strips (not as violent but that's the noise) I have replaced the O2 sensor 3 times and the third time installed an O2 extension, replace the mass air flow sensor, replaced the gas pedal. There is no gas smell under the hood and sounds perfectly normal at idle. When cruising the RPM's flutter. Need some help the engine has 192K miles on it. Thanks Mike