[jrdwyer]

Let me guess, you have General Tires that came original with the van?

We have such tires and there is some limited (but noticable) vibration at around 40 mph. The dealer wouldn't help even when the tires were fairly new becuause it is a tire manufacturing issue. On our van, all rotations were done and alignment is correct. So to sum it up, the General OE tires on the GM minivans are of low quality.

I read in the news that General was closing a tire plant in the south. Probably the one that makes these OE tires for the GM minivan plant that is also scheduled to close.

I can't wait to get some new Michelin or Goodyear tires installed and have a smooth ride again at all speeds!