TRADITIONAL - Model 388 Versatility and Productivity, On- or Off-Road The Model 388 retains Peterbilt’s signature traditional styling with technological and aerodynamic enhancements f or image-conscious and performance-driven fleets and owner operators. The Model 388 features the industry’s only all-aluminum hood in a 121” BBC, and it opens a full 90° for serviceability. The durable Model 388 can be spec’d with a wide variety of drivetrain and suspension options, and can accommodate engines up to 600 HP. It’s available with three premium interior packages, and as a day cab or with a full range of detachable Unibilt sleepers for exceptional comfort and versatility. The Platinum Level interior and 70” Platinum sleeper are simply the most luxurious interiors available. The Model 388 refines traditional Peterbilt styling with fuel efficient enhancements to raise the bar for performance, durability and resale value.