swathdiver
Full Access Member
GMT900 AWD Denalis are always in 4WD.My guy seemed to be very good about making sure the fluid flow was OK. Plus three years parts and labor warranty will focus the mind and near exclusive towing should grenade the tranny in less than that amount of time if fluid flow is substandard.
It does have the tow package, after all.
Unfortunately, I have no transfer case shifter because the Denali driving soccer Moms would never want to chip their nail polish while shifting. Thus the computer does the shifting unless you trick it with the brakes or parking brake.