not sure but there are some place were you can get it for 40 cents more but its like sams club and last time i used there regular gas in my 14 5.3 went thru it like is was nothing
the truck didn't come with running boards so i took the ones off my trade in 14 silverado they don't look to bad i needed them so my mom can get in and out of the truck
Thanks
if you would of read my post http://www.gm-trucks.com/forums/topic/160608-frame-waxundercoating/page-2 you would of seen this pic and at the bottom it is one of the parts needed to do the fix part 36502 Lloyds kryptonite metal treatment
took my moms truck in today to have them look at this issue was told that it was normal but they will fix it my truck is also having the same issue
heres pics of my 2014 crew cab 5000 miles next 2 pics are of my moms 2013 crew cab only 6000 miles and the last two are my brother 2012 ext cab with 13000 miles his looks almost brand new besides the one spot on the driver side
also not that hard when looking in the passenger mirror to look a little bit more to the right out the back window and see if anyones in your blind spot