Cox & Cohea provides one-stop shopping for new or pre-owned cars and trucks. It is a Chevrolet, Buick and GMC dealer serving St. Charles County and surrounding areas. It has an excellent website where prospective customers can browse pre-owned specials, new car specials and even activate a chat line with one of its representatives. This dealership also offers GM-certified used vehicles that include a 12-month/12,000-mile bumper-to-bumper warranty, a 100,000-mile/five-year powertrain limited warranty, roadside assistance, a 117-point inspection, a vehicle history report and a three day/150-mile satisfaction guarantee.