- DIY How To Replace A Rear Tail Light Bulb On A 2009 Pontiac G6 and Save $40. - Hello Donnie Smith here, in today's video I am going to show you how to replace a rear tail light bulb. This will save you $40 when replacing a bulb on a 2009 Pontiac G6. The part only costs two dollars and only takes 5 min. to install.