Gotcha on the 18 days. Wow you were fortunate there. Also that the ED has the 100k warranty instead of the 60k that the gassers get.
AEM is the government/ law suit settlement retune (detune) and up to $3,075 that 2014 through 2016 trucks qualify for. If you never got notification then see your dealer. Basically they retune both your engine control module and the transmission control module aka a tune. Supposed to be better for the environment which actually is debatable but at any rate it’s not so good for your truck.
That being what it is many allow the dealership to do the AEM tune and then take their check and buy the tunes (now from an out of country such as Canada tuner company) and get a cleaner running more powerful & fuel efficient truck then the stock original usually with the added benefit of an exhaust brake plus other benefits. (Great If you tow a travel trailer etc especially over mountain grades etc) The tune includes software that turns off your EGR (exhaust gas recirculation) a proven needless and engine destructive government mandated emissions device.
There are at least 3 companies based or with affiliations out of country providing them but I only have a link for this one. Maybe something else has a link for others.
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