Detailed Notes: Engine Heavy Duty Pressurized Coolant Reservoir with Cap & Sensor for Kenworth T2000 T660 T680 T800 T880 W900 Peterbilt 337 348 357 362 379 382 384 385 386 387 388 389. 2012-2014 Peterbilt 388 Base Tractor Truck - Long Conventional 15.0L 6 Cyl CNG.