A lot of people on this forum have noted the extended crank/no start issue, but I just started getting something a little different. After taking my 2021 AT4 3.0L LM2 to the shop with a check engine light for NOx efficiency, the dealer completed an ECM update. Every start since I picked it up last week the truck cranks three times longer to start than it did before the update. It is not as noticeable as when the truck cranks forever and fails to start, but it is not right. I have one other confirmed case of this situation from a friend with the same truck, but was wondering if anyone else is having this problem after the newest update? To make matters worse, when the auto stop feature kicks in there is a longer delay than normal for engine re-fire which is not doubt a safety issue when in traffic. Thanks in advance for your responses.
