This is an old thread, but I found some the the postings helpful. So, I decided to register and add my comment. I have a 2006 G6 GT Coupe, bought new, which has not been driven much, < 40K. I have not had a lot of other problems, but did have the raw gas odor when parked or when left in the garage. With some help, I dropped the tank and found the exact problem described by Rinker232, a hairline crack in the right-angle fitting on the fuel supply line emerging from the top of the fuel pump assembly cover on the tank. Fuel would slowly leak onto the top of the tank and evaporate. There was no dripping and the car ran just fine. Unfortunately, the fuel pump, fuel filter, gas level sensor, and all the attached tubing, including a three foot long fitted fuel line is part of the assembly. Since the pump, filter, and sender were all perfectly fine, I decided to try to repair rather than replace the assembly (which is several hundred dollars). I removed the remainder of the very brittle black plastic fitting with the crack, and carefully cut and removed the inner convoluted plastic fuel line. I bought 2+ feet of 3/16" fuel line hose and attached it to the barb at the base of the fuel filter 'box" clamping it with a metal hose clamp. The 3/16" fuel line was then tightly inserted through the hole in the cover portion of the assembly and attached to the original external 3' fitted fuel line that clips to the top of the gas tank. I left the original remaining hose barb from the broken fitting inside this fitted fuel line for strength and then attached a second clamp to the 3/16" fuel line pushed over the original. Taking great care to position the 3/16" new fuel line so as not to pinch it, I reassembled the fuel pump assembly into the tank and fitted the tank in place. The car runs fine and no more gas smell.
Last edited by SparkDog; 01-19-2011 at 09:17 PM.