Tyler Raumer

My truck is a 2013 Silverado 1500 LT with the 5.3 Flex fuel engine. I was driving home yesterday and my check engine light starts flashing along with ABS and traction control lights. The truck started to misfire and shake, I scanned the codes and got P0641 and P069E. Eventually the check engine light stopped flashing and the truck started to run better (still misfiring but without the vibration and flashing CEL). I immediately suspected the fuel pump as the truck has 176,000 miles (150,000 of those pulling a trailer).When we got home I hooked a mechanical fuel pressure gauge up to the Schrader valve and got these results. Key on engine off - 60psi Engine running at idle - 42-44 I also check the fuel pressure with My scan tool while driving and had around 44psi. I cleared all the codes and we drove around for about 15 minutes and the only code that came back was a cylinder 3 misfire. The truck will still runs and drive now but it's obvious there is a misfire anytime we stopped or let it idle in park. Tomorrow I plan on replacing the fuel pump but I'm still not 100% sure that's the issue, any help would be appreciated.

My truck is a 2013 Silverado 1500 LT with the 5.3 Flex fuel engine. I was driving home yesterday and my check engine light starts flashing along with ABS and traction control lights. The truck started to misfire and shake, I scanned the codes and got P0641 and P069E. Eventually the check engine light stopped flashing and the truck started to run better (still misfiring but without the vibration and flashing CEL). I immediately suspected the fuel pump as the truck has 176,000 miles (150,000 of those pulling a trailer).When we got home I hooked a mechanical fuel pressure gauge up to the Schrader valve and got these results. Key on engine off - 60psi Engine running at idle - 42-44 I also check the fuel pressure with My scan tool while driving and had around 44psi. I cleared all the codes and we drove around for about 15 minutes and the only code that came back was a cylinder 3 misfire. The truck will still runs and drive now but it's obvious there is a misfire anytime we stopped or let it idle in park. Tomorrow I plan on replacing the fuel pump but I'm still not 100% sure that's the issue, any help would be appreciated.