SCOTTSDALE, Ariz. – Peterbilt Motors Co. has introduced a new sleeper design that offers improved aerodynamics, is available in single-and double-bunk designs, and was designed with input from drivers, the company said here.

Second-quarter net income declined for truck maker Paccar Inc., even though revenue increased for the Bellevue, Wash.-based parent of Kenworth Trucks and Peterbilt Motors.

Peterbilt will produce a Model 389 Canadian 150th Anniversary edition to salute Canada’s history using distinctive styling and exclusive Canadian features, the truck manufacturer said.

LOUISVILLE, Ky. — Kenworth Truck Co. and Peterbilt Motors Co. said they will be offering Allison TC10 fully automatic transmissions on selected models, that they are starting certified pre-owned truck sales programs and that they soon will offer as standard, in certain cases, Bendix Wingman Advanced safety systems.