Please fill out the following to ask a question. MAKE: GMC MODEL: c5500 YEAR: 2005 MILES: 230k ENGINE: 6.6 duramax diesel DESCRIBE ISSUE....intermittent problem. I'm driving along and when the tranny kicks into 2nd gear, the engine revs like I am pumping the gas. Problem eventually goes away. I wonder if changing the fuel filter would correct this.