2003 Pontiac Montana Owner's Manual - Page 297

Driving Through Deep Standing Water Notice: If you drive too quickly throughdeep puddles or standing water, water can come in through your engine's air intake and badly damage your engine. Never drive through water thatis slightly lower than the underbody of your vehicle. If you can't avoid deep puddles or standing water, drive through them very slowly. Some Other Rainy Weather Tips Turn on your low-beam headlamps - not just your parking lamps - to help make you more visible to others. Besides slowing down, allow some extra following distance. And be especially careful when you pass another vehicle. Allow yourself more clear room ahead, and be prepared to have your view restricted by road spray. Have good tires with proper tread depth. See Tires on page 5-59. Drilling Through Flowing Water Flowing or rushing water creates strong forces. If you try to drive through flowing water, as you mightat a low water crossing, your vehicle can be carriedaway. As little as six inches of flowing water can carry away a smaller vehicle. If this happens, you and other vehicle occupants could drown. Don't ignore police warning signs, and otherwise be very cautious about trying to drive through flowing water. 4-20