This could be an ongoing thread, just to keep track of the visual changes on different MYs so it's easier to identify the year of a G6 when you see one on the street (given that the appearance has not been modified):
2005
- Radio and HVAC controls do not have chrome
- No GM badge
- 4-spoke steering wheel
- Only year Sport Red available (darker than Crimson Red)
- Trunk badging is flat
2006
- Coupes and convertibles have moulding along the side of doors
- First year with GM Badge
- Last year base with 16" alloy wheel available
- Last year Stealth Gray Metallic and Fusion Orange available
- First year GTP available
- Only year with GTP seat embroidery
- Only year with GTP convertible
2007
- Blue-gold Crystal Metallic available, only year convertibles with this colour
- Coupes and convertibles have no moulding on doors
- First year base with 17" vented wheels (also on base V6 in Canada)
- First year GT coupes and sedans with 18" alloy wheels and dual exhaust
- First year base V6 with 17" alloy wheels (US only, Canada optional)
- Last year Granite Metallic, Crimson Red, Electric Blue available
- Last year Morroco Leather available
- Last year for Panoramic Sunroof
- Last year for all GTP models
2008
- First year for GXP models, unique front and rear fascias
- First year with factory body-coloured mirrors on GXP models
- First year Performance Red Metallic, Midnight Blue Metallic, Dark Steel Gray Metallic, White Diamond Tricoat, and Carbon Black Metallic available
- Last year Emerald Green Metallic, Sedona Beige Metallic, Black, Liquid Silver Metallic and Ivory White available
- Majority of GT sedans have spoilers (except for very early builds)
- Radio has AUX jack
- New wiper blade hook design (not squeeze-release)
- Last year painted 18" flangeless wheels available
- New style 18" Chrome-Tech wheels available (GXP and GT Convertible with PDX Only)
- First year for GT Street Package, unique front and rear fascias
- Last year 16" wheel covers available
- Last year for Value Leader Sedan
- Last year Chrome Appereance Package available as dealer accessory
- Last year for Power Adjustable Pedals
2009
- First year 17" standard across the line
- First year convertibles with 18" Chrome-Tech wheels
- First year for Quicksilver Metallic, Summit White, Gold Mist Metallic, and Silver Green Metallic
- First year for base 4-cylinder models with Driver Shift Control (look at the gear shifter)
- All cars now have XM radio standard (look for the XM dimple antenna)
- First year for base 4-cylinders to get leather seats
- GT/GXP models get dimming compass mirror standard
- Cruise control no longer standard (missing buttons from steering wheel)
2005
- Radio and HVAC controls do not have chrome
- No GM badge
- 4-spoke steering wheel
- Only year Sport Red available (darker than Crimson Red)
- Trunk badging is flat
2006
- Coupes and convertibles have moulding along the side of doors
- First year with GM Badge
- Last year base with 16" alloy wheel available
- Last year Stealth Gray Metallic and Fusion Orange available
- First year GTP available
- Only year with GTP seat embroidery
- Only year with GTP convertible
2007
- Blue-gold Crystal Metallic available, only year convertibles with this colour
- Coupes and convertibles have no moulding on doors
- First year base with 17" vented wheels (also on base V6 in Canada)
- First year GT coupes and sedans with 18" alloy wheels and dual exhaust
- First year base V6 with 17" alloy wheels (US only, Canada optional)
- Last year Granite Metallic, Crimson Red, Electric Blue available
- Last year Morroco Leather available
- Last year for Panoramic Sunroof
- Last year for all GTP models
2008
- First year for GXP models, unique front and rear fascias
- First year with factory body-coloured mirrors on GXP models
- First year Performance Red Metallic, Midnight Blue Metallic, Dark Steel Gray Metallic, White Diamond Tricoat, and Carbon Black Metallic available
- Last year Emerald Green Metallic, Sedona Beige Metallic, Black, Liquid Silver Metallic and Ivory White available
- Majority of GT sedans have spoilers (except for very early builds)
- Radio has AUX jack
- New wiper blade hook design (not squeeze-release)
- Last year painted 18" flangeless wheels available
- New style 18" Chrome-Tech wheels available (GXP and GT Convertible with PDX Only)
- First year for GT Street Package, unique front and rear fascias
- Last year 16" wheel covers available
- Last year for Value Leader Sedan
- Last year Chrome Appereance Package available as dealer accessory
- Last year for Power Adjustable Pedals
2009
- First year 17" standard across the line
- First year convertibles with 18" Chrome-Tech wheels
- First year for Quicksilver Metallic, Summit White, Gold Mist Metallic, and Silver Green Metallic
- First year for base 4-cylinder models with Driver Shift Control (look at the gear shifter)
- All cars now have XM radio standard (look for the XM dimple antenna)
- First year for base 4-cylinders to get leather seats
- GT/GXP models get dimming compass mirror standard
- Cruise control no longer standard (missing buttons from steering wheel)
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