Find aftermarket Peterbilt 386 Coolant Reservoirs. Keep your Peterbilt cool with durable coolant reservoirs, surge tanks, caps, and sensors. Whether you need a replacement tank or just a new cap, these high-quality parts ensure proper fluid levels and temperature control. With options from trusted brands like BESTfit, you can count on these cooling system essentials to keep your truck running smoothly. Stay road-ready with reliable solutions built for your rig!