We just purchased this truck, having traded in a 2010 Chevy Colorado that we flat towed similarly...
The most concerning item we have are the directions for setting up for flat towing. If you look at page 298 of the owners manual, the last instruction in number 9 is to “keep the ignition key in the towed vehicle in ACC/ACCESSORY to prevent the steering column from locking” which makes sense. ...Makes me wonder if this will really happen since you have already disconnected the battery?…
Within the directions to dinghy tow, on page 298, number 4 refers you to page 194 where, when you get to page 196/197 it guides you through the transfer case directions - shifting into neutral - number 8 says to "turn the engine off and the ignition to ACC/ACCESSORY”. Number 9 says to “place the transmission shift lever in Park. See Recreational Vehicle Towing on page 296”. But number 10 says “turn the ignition off”.
I have tried calling several service depts & tried to contact someone at GMC too - no-one seems to KNOW which is correct...
OUR QUESTION is - which is correct at the end of the directions to tow the pickup behind our motor home. Turn the ignition off on page 197 or keep the ignition key in and turn it on ACC/ACCESSORY on page 298?
Thank you!