[Mudchief]

Glenn, I am like you I have never ran anything in mine. However i put my 05 in the shop today because the fuel mileage around town dropped from around 17 to around 13. They went through it and could not find anything wrong. They told me they thought the injectors were dirty and to run some injector cleaner in my tank for the next 5 tanks. We will see I hope they are right. Now if it gets better is it because of the additive or what was causing the problem in the first place. I asked the GM dealer if they had any additive and was told they don't sell any.