toored

I have tried the local junkyards and all I've found are as bad as mine. I noticed that O"Reilly Auto carries the TYC brand. I may try them. Thanks again!

A quick question for you folks: Who makes the best aftermarket headlamp lenses for a 2001 GMC 2500HD? Possibly made in USA? Mine are shot and I can't afford GM OEM lenses. Thanks a million for any advice! TOORED

Thanks Newdude, It does appear to be a viable option. Although the core width is only 37 13/16" which is 4 inches narrower than the GM radiator. I may give them a call and inquire why. Thanks to everyone for the help.

Thanks Newdude, You are correct. My original part number is 15058682. It's a beast of a radiator with a 2 3/8 inch thick core. I bought the GM P/N 89018317, which is GM's official replacement. I wish I could find a 15058682 new somewhere. I would pay handsomely for it.

That is my fear. However, from every search I can find, the thinner core "official GM" replacement that I bought, and all aftermarket radiators have a thin core. Every aftermarket unit I've found have an even thinner core than GM's 1 3/8 core. This is frustrating.

I already bought the official GM replacement radiator (boy are they proud of them!) but wasn't aware that the core thickness was much thinner than the original. I'm almost finished removing the old radiator. I will see if there's any other numbers on it that may lead me to one identical to the original. Otherwise, I guess I'll be installing this unit.

Thanks for the reply David. I called them and they said if the tanks are cracked, the radiator must be replaced. They couldn't find any aftermarket radiators with a 2 3/8 inch core. That stinks.

My radiator has started leaking so I'm in the process of replacing it. I understand that there were two (2) different radiators installed in these trucks with the Allison 5 Spd: GM P/Ns 15058682 and 21433 (correct me if I'm wrong). While attempting to order a genuine GM replacement radiator, I have found that both of these have been replaced by GM P/N 89018317. This radiator has a core thickness of 1 3/16 inches (2 row). However, my original radiator has a core thickness of 2 1/8 inches (3 or 4 row). I can't find a replacement radiator with a 2 1/8 inch thick core, in GM or aftermarket radiators. I want the extra cooling capacity of the original if I can find one. Have any of you folks had this issue and do you know of any options available with a thicker core? Thanks a million for any help.

I agree with Terry. I have a 2001 8.1 liter with 3.5 inch duals/high flow cats/twin-in twin-out Flowmaster. It was on the truck when I bought it. It sounds mean but gets annoying after a while, and the highway drone is evermore annoying. I keep the system on the truck only because my redneck wife loves the hell out of it!