I have an 88' C1500, 5.7, 3.42 rear, auto. The engine is unmodified less the removal of the engine driven fan. I have installed two 12" fans (pushing) and one 16" fan (pulling) electric radiator fans last November. Well it's July and they will not provide adequate cooling. Before I but the mechanical fan back on, I thought I would ask is there an OEM radiator that will bolt in that have more cooling capacity. Has anyone had to whip this problem themselves. Thanks

 

If you plan on putting in a new and larger radiator look at coolestradiator.com for one that will fit your truck. Bought on a Fri rx'ed next day, great service and prices. Mine was for a 2001 silverado 5.3l and ordered a larger 1 1/4" vs 15/16" core. Make sure you order core size and not complete radiator size. Also make sure thermostat is new and proper coolant is put in. Good Luck