sdowdy

I haven't checked on my 14 yet, but when my 2010 was in 4wd high and in manual gear it would disable TC and Stabilitrak completely after holding the disable button. If it was in drive stabilitrac would still engage.

"""A well designed piece of equipment will adapt to the conditions it's used in. Which is what the truck is doing by deciding to or to not go to V4...""" I agree, it should adapt to changing conditions. What is the condition that would cause it to stay in V8 down a 1/2mile stretch, I'm guessing 5-7% grade? Some days it stays in V4, some days it stays in V8. The system is random, it's not consistent day to day or during the same conditions. I've had the fire recall so I'm assuming my truck is up to date on the rest.

AFM just seems to randomly work on my truck too. I have multiple downhill stretches on my daily route. Some days it is in V4 mode with no pedal pressure/coasting, The next day it requires some pedal pressure to make it engage V4 and when I let off the pedal it goes to V8. Then other days it won't engage at all whether it's downhill or straight stretch. I've found it to have nothing to do with weather, wind or what gear I'm in. It just works when it wants to. It would be great if GM would give us an option to disable it completely as they do with stabilitrack/traction control.