I've got a '99 ZR2 extended cab pickup and the tank is leaking at the seam. I would like to replace the tank with a new plastic one but haven't had much luck in finding any. Suggestions?

Certain 4DR models used plastic tanks and mounted them midship inside the frame rail. Not sure about 2DR models, I have only seen steel tanks mounted aft axle on them. You might find something aftermarket on eBay though.

03-05 ZR2 blazers used a plastic tank, not sure about the trucks. I thought 02-03 S10 ZR2's had plastic tanks as well.