Pontiac added a lot more excitement to its 2006 G6 lineup.  Last year's base and GT sedan models now get a coupe and convertible and a new GTP trim.  More engine choices complement the single 3.5-liter, 201-hp V6 engine from last year.  The G6 sedan comes as a base model, with either a new 2.4-liter, 4-cylinder, 167-hp engine or the old 3.5 V6.  A G6 1SV sedan features the I4 and has fewer options, such as no ABS brakes or sunroof.  The GT sedan, coupe, and convertible feature the 3.5 V6, while the new GTP models carry a larger 3.9, 240-hp V6.  All come with a 4-speed automatic.  The GT and GTP have a manual mode automatic, and a 6-speed manual transmission is optional on the GTP models.
While the base sedans come well stocked, with power driver's seat, power windows, locks, and doors, and cruise control, the GT and GTP models feature more sports suspension, stronger anti-sway bars, and larger tires (17 and 18 inches respectively).  ABS brakes and traction control are standard for these trims, and optional for all but the 1SV sedan.  Other options across the line are heated seats, leather upholstery, remote start, side curtain airbags, power-adjustable pedals, and a traditional or Panoramic four panel-sunroof.  
A lot of owners like their 2006 Pontiac G6 for its good fuel economy for a mid-size car, instant acceleration, and cruising speeds on the highway.  It handles and performs nicely, and the exterior styling makes it look sportier and pricier than it really is.  They also like the long list of features it comes with.  On the negative side, owners point out that leaks can develop around the sunroof and B pillar, the Panoramic sunroof tends to rattle, rear visibility is compromised by a high back-end, and the interior parts look plastic and cheap.