I've got a 96 Olds 88 with a non supercharged 3800 series 2. I had a coil pack go out on me last night for the number 3 cyl. I had a set of 01 Bonneville SSEi coils laying around (supercharged 3800 series 2). I looked them over, exactly identical. So I threw them on it (the whole set of 3). Runs great, check engine light went out, perfect. But just to check I went to talk to some guys at the local Chev dealership to cross reference them and they have different part numbers. 96 & 01 3800 non supercharged use the same part number. And 96 & 01 3800 supercharged use the same number but different then the non supercharged ones. My question is this, whats the difference? Anybody? Two chev dealerships say if they look identical and install the same with no modifications, and it runs good. Just go with it. But I don't want to screw anything up so I'm looking for a couple more opinions...