The five-seat 2007 Pontiac G5 comes standard with a 148 horsepower, 2.2 liter, 4-cylinder Ecotec engine and a five-speed manual engine, while an upgrade to the GT version of the car comes with a kickier 178 horsepower 2.4 liter Ecotec engine and a four-speed automatic transmission that includes overdrive functionality. Estimated fuel efficiency with the 2.2-liter engine is 25 city and 34 highway with the 2.4-liter unit returning 25/34. (Fuel capacity is 13 gallons.)

The G5's instrumentation includes a speedometer, fuel gauge, tachometer, and Driver Information Center with outside temperature, warning messages, and programmable menu features. The front seats are buckets with manual recliners and adjustable outboard head restraints. They are not heated, but heating is an option. The back seat is a bench with a 60/40 split and pass-through access to the trunk. Other standard features include keyless entry, though keyless ignition is only available as an option, as is OnStar.

The standard audio system is a four-speaker AM/FM/CD combo with MP3 playback, auto-tone control, Radio Data System, automatic volume, and TheftLock. The optional premium system is a 228-watt, seven-speaker Pioneer unit with amplified tweeters and a rear subwoofer. XM Satellite Radio is also available.

The 2007 Pontiac G5 comes with airbags to protect the driver and front-seat passenger from front-impact collisions, but heat-protection and side-impact protection are optional upgrades, as are airbags for the back seat.