| Your fuel filter is a very important part to change and 80k is way over due. However I don't think this would be a shifting problem. You should take it into a Chevy dealer or anywhere you can get the tranny flushed. As high of kms are on that thing, and if it's never been done that tranny fluid is really dirty. Which would be causing those pistons that direct the flow from your 2nd and 3rd rail to be sticking and keep it in second. |