So this is second time ses light has came on. Says it’s p0325 code (have hypertech programmer) 2018 Silverado 5.3 with only 5,000 miles on the truck now. First happened about 2 months ago on the high way just after I put it to the floor for a few seconds. Think that was on my first tank of shell 87. Anyways, cleared the code and been running chevron 87 until yesterday I filled back up at the same shell, and on my way home from work same thing. Got on the gas and light came on. I would of taken truck into dealer but I have the hypertech installed. Only way to uninstall it you have to clear the code.
Done some research saying it’s better to run 89? Is it a combination of hypertech and maybe the gas at my local shell station? For months now that shell has only carried 87 and it’s also cheaper than any other shell around. What’s your thoughts? Thanks