The interior of the Suburban has no unneeded frou-frou items. It sports vinyl floors, a vinyl headliner, manual crank windows, and manual locks. Occupants are protected by a 12-point rollcage made from 1 3/4-inch-diameter, 0.095-inch-wall DOM tubing. The custom aluminum dash was designed in conjunction with the rollcage and it features Auto Meter Z Series gauges that include mechanical transmission temperature, mechanical coolant temperature, a cable drive speedometer, pyrometer, and fuel level. Second Skin Audio sound deadening mats were applied to the body tub floor and firewall to alleviate engine and road noise. Other interior mods include a Lowrance Baja 480, Cobra CB radio, Yaesu race radio, and an audio system comprised of Alpine, Memphis Audio, and Boston Acoustics components. Under the driver-seat are a Perko heavy-duty battery selector switch and an Auto Meter battery voltage meter that shows the voltage of the battery in use (a pair of Optima BlueTop batteries are located near the transfer case).