This problem started about a year ago. If I'm trying to go up hill the suv shudders. Also on the highway, especially trying to pass, it's almost like it's running out of gas. The vehicle starts and runs fine, breaks up under power mainly during highway use, but can happen anywhere. There's no lights on, no codes, nothing shows up on the diagnostic machine. I thought I had a clogged fuel filter but a 2009 traverse has no in line filter, it's in the fuel tank. If anyone out there had this problem any advice would be extremely helpful. Thank you. /