2010 Enclave AWD tows beautifully! Just installed a battery disconnect switch behind the grille that I can reach with my fingers thru the grille without raising the hood. Makes it much simpler than pulling the fuse. And, to confirm - does not delete radio stations, but does interrupt clock (!), no, does not rack up miles on the odometer. Occasionally, I will get a check engine light after towing. It resets after about one day of normal driving. (I believe it generates a code pertaining to low battery voltage.)
Bob & Deb K.
2012 Itasca Ellipse QD 'Elli'
2010 Buick Enclave AWD Toad 'Ginny'