i want to leave my paintiac montana 2001 with out using in winter ( -20 to -40) for 3 months
Yes, that would be wise. Disconnect the negative (-) cable first then the positive (+) cable. There's usually a hold-down "block" at the bottom of the battery which is secured by a bolt. Remove the bolt & block then pull the battery up & out of the vehicle. Store the battery in a warm, dry location but not on concrete. Set the battery on a piece of cardboard while in storage. HTH. -Jim
I would set it on a peice of wood not card board though or a shelve just not on concrete
Your battery will keep a charge longer if placed on cold concrete. The cold slows down self discharge. Today's battery cases are not porous like the first batteries were. In the old days, acid would leak through the rubber case and cause a conductive path in the concrete that would discharge a battery. Back then, the wood prevented the conductive path because it would soak up and neutralize the acid.
Looking for a Used Montana in your area?
CarGurus has 426 nationwide Montana listings starting at $1,795.
Search Pontiac Montana Questions
Pontiac Montana Experts