After a 6 hour one way trip with my 1996 Chevy 3500 pulling my gooseneck camper, I was alerted to a hairline crack in the Left hand plastic radiator side tank. A new radiator would cost me at least $150 but instead I found a $10 option at my local auto parts store. Pictured here is my radiator side tank with the under hood tool box, washer fluid neck, oil cooler line, oil cooler line retainer, and radiator hose removed. you can see the crack extending from the radiator hose neck to the oil cooler line fitting. The kit included a two part epoxy, sand paper, fiber glass mat, and a brush to apply the epoxy. I'm sure you can see how this goes but I'll type it out anyway. drain the radiator down to below the crack, sand the crack and at least one inch all around it, clean thoroughly (I used brake cleaner), mix the epoxy for 15 seconds and brush onto repair evenly and thick, press the mat into the epoxy over the crack, then apply as much epoxy on over the mat before it sets up. This stuff sets up quick! After letting the epoxy set up for 20 minutes, the instructions say that I should be able to top off the radiator and run the truck in a couple of hours but i'm going to let it set overnight. I will update this thread in a week to let you guys know whether or not this product worked for me, I'm sure I'm not the only one with this issue. HAPPY WRENCHING!