The Greenfield Police Department maintains a diverse fleet of vehicles in support of the goals and objectives of the agency. The Patrol Division accounts for the majority of the vehicles in inventory, utilizing 12 marked and one unmarked squad cars as well as one marked prisoner conveyance van (paddy wagon). Squad cars assigned to the Patrol Division are usually replaced on a biannual basis with most squads tallying in excess of 60,000 miles at retirement. Squad cars are removed from service on this schedule to insure that they are in good mechanical condition and to secure a suitable trade in value.

In addition to standard "police package" equipment, squad cars are outfitted with 800 megahertz Motorola trunked radios, Mobile Data Computers (MDC's) and scanners to monitor surrounding police agencies. Squads are also equipped with high-intensity overhead lighting and two powerful sirens. All of the squad cars in inventory are Ford Police Interceptors, the only full-size, rear wheel drive police package vehicle currently in production. Squad maintenance is handled by the Utility Person, under the direction of the Support Services Commander.

In addition to the vehicles assigned to the Patrol Division, the Department maintains 21 vehicles assigned to various other divisions within the agency including the Criminal Investigation Bureau, Canine Unit, Special Operations and Youth Services. New to the department is a 1940 Chevy truck being renovated as a DARE Project Vehicle. The 1993 graphic design, conceived by Officer Tim McElrone, won third place nationally in a design competition sponsored by Law and Order Magazine.