What is the + or - on the shift lever used for?
2011 Buick Enclave low gear operation on 2011 Buick Enclave
In manual mode (-) will down shift (+) will up shift. If should be explained in the owner's hand book. Check here http://repairpal.com/automobile-owners-manuals-online or try this link you may be able to down load a free copy of the owner's manual for your vehicle http://www.autousermanual.com/