On 3/29/2019 6:18 PM, MAlvarez wrote:
> replying to Neil, MAlvarez wrote:
> I had read from the Chevrolet website about the horsepower gains by
> using E85.
> So I started filling up with E85 a few times. Check engine light turned on
> last time I filled up. Took it to get checked out and it gave me the code
> PO50D, cold start rough idle, .. ran the tank down to empty and filled
> up with
> Regular 87 unleaded.. after a quarter tank the check engine light turned
> off..
> my vehicle is flex fuel, I don’t understand why it does this. 2014
> Chevrolet
> Silverado 5.3 4x4 LT
>

Can you provide the Chevy link you refer to?