View all 35 consumer vehicle reviews for the 2004 Pontiac Montana on Edmunds, or submit your own review of the 2004 Montana. I have a 1989 Pontiac Grand AM LE 2.5ltr. and It has been a process bringing this car back to drivability since I've purchased it back in 2007 for a mere $800.00. Currently, the car is shaking at the front end and has a hard vibration that can be felt inside the car while running at idle, and Learn about the 2004 Pontiac Montana Van at Autotrader. See car photos, auto videos, car safety information, new car prices, special offers, reviews, and more. 2004 Pontiac Montana weight distribution from Reese. Product reviews from other Montana owners. Strait-Line Weight Distribution System w Sway Control - Round Bar - 10,000 lbs GTW, 600 lbs TW recommend a weight distribution system with a 10000 pound gross weight and 600 pound tongue The annual maintenance cost of a 2004 Pontiac Montana is $345. Repair and maintenance costs vary depending on age, mileage, location and shop. Repair and maintenance costs vary depending on age, mileage, location and shop. Hi Guys, It honestly costs me over ?1,700 every month to keep this site going (storing so many manuals online is expensive!) so I rely on donations from people like you who are willing to share a few quid to keep us online. If we've helped you even a small amount please use the slider above to donate whatever you can. Research the 2004 Pontiac Montana online at cars.com. You'll find local deals, specs, images, videos, consumer and expert reviews, features, trims, and articles for every turn in your Montana. View and Download Pontiac 2004 Montana owner's manual online. 2004 Montana Automobile pdf manual download. Pontiac Montana. The Pontiac Montana is a minivan from the Pontiac division of General Motors. Before 1997, it was offered a trim package to Pontiac Trans Sport. In 1997, the Trans Sport added the Montana moniker as part of an available trim package. The package proved so po