A good dual action polisher will help you remove scratches. Harbor Freight Tools has a good entry level polisher that is very affordable for the weekend warrior. I have always been one to say "It's not what you use, it's how you use it" No need to drop big bucks on polishes and tools.
So I added the Performance Improver and then filled my tank. It works! I actually got better combined gas mileage throughout the week. Awesome! Thanks so much.
Never take ANYTHING to the dealer for a "squeak". Do you really want to pay $100/hr for them to find nothing. Use a good spray lube and hit all possible areas 1st.
I wouldn't do it. They probably won't approve GM parts. We had that same issue a while back. I thought I had a GM warranty but it was a dealership aftermarket warranty. And just my luck, the selling dealership closed.
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