GM has released a new Service Bulletin for a top-end engine ticking noise that may certain affect units of the Chevy Silverado 1500, Colorado, and Traverse.

Last year's GM L87 engine recall states that some models need an entire replacement engine. Now, we want to know - how's that replacement engine doing so far?

To clean, simply mist the engine bay with your spray, let it sit for a few minutes, then rinse. If your engine bay is especially dirty, you can agitate the grime with a rag, or you can even use a ...