Originally Posted by GMCTRUCKS
Check timing also replace rad cap check to see if the fans are turning in the right direction check idler pulley bearing if it frozen that will affect it and as another member wrote check condensor for mud and leaves oh do the fans have the correct shroud.
What I did on my truck is I put on a high volume water pump due to I have underdrive pulleys and I tell you the water pump sure does flow much better and last make sure rad isn't plugged up. I remembered this one make sure upper rad hose is lower than rad cap.
the dual fan setup that he has actually covers the whole radiator core and are wired to be a puller. the a/c compressor been gone and replaced with a a/c delete pulley and condenser was removed when engine was installed..