The roomy interior features an overhead console and overhead rail system that integrates rear HVAC (heating) and audio controls, lights, and rear-seat DVD entertainment system in a single unit. Each of three additional storage modules is about 12 inches wide, 10 inches deep, with job-specific shapes.

Relay's optional and removable rear storage system provides a level but high load floor for carrying cargoes secured behind the second row. Second-row bucket seats can be folded and tumbled against the front seats. As the seats are stowed back to front, you get 27 cubic feet, then 74 cubic feet, and finally 136 cubic feet of cargo space. All but the front seats are removable.

The interior styling is clean and contemporary, with good, but not adventurous, materials, and good fit and finish. The Relay uses an unconvincing maple wood grain for its radio and HVAC trim and door switch plates. Two interiors are available, in ebony/gray and ebony/cashmere combinations. Relay 3 models have a leather-wrapped steering wheel with redundant audio controls built in.

The gauges in the central cluster are large, with large numerals, easy to read and use. The instrument panel, center console and door panels are well integrated, and follow GM interior schemes to the letter. Most of the materials look good and are soft to the touch. Likewise is the operation, adjustment, and stowage of the seats. The second-row captain's chairs are roomy and comfortable. The hidden rear area cargo organizer on our Relay 3 test truck was well thought out for small, medium, and long cargoes, though not very deep.

The standard eight-speaker AM/FM/CD/MP3 sound system sounded good to us, and the DVD system was easy to use, even for an adult. One of the most interesting options on the Relay is the new PhatNoise entertainment system, a 40-gigabyte hard drive that installs in the overhead rail system. It can store up to 10,000 songs in MP3, WMA or WAV formats, store and play up to 40 movies, or a combination of songs and movies. It can play video games, and has a voice-browsing interface. It can transfer digital photos through a USB port in the cartridge and play them back on the DVD screen.