I got my first full size blazer 6 months ago. Love it. However in the last month I have been having the following problem: Intermittently on light acceleration (at any speed in any gear) I will get severe hesitation. If I floor it I can push through it and flatten out the hesitation but I would guess this is not a good thing. When it happens it last from 5 minutes to when I shut down the rig. When I start it back up it may not occur for a few days or it may happen immediately. I would like some idea before I take it in to have it worked on. Ideas? Also any good mechanics in Portland Oregon?