Will the ls1 fans cool my truck with my 34" radiator?? My harness is pcm controlled with 2 switches with the capabilities of overiding the pcm and turning the fan on high low or one on high........ Only people with personal experience please...

TIA

 

Running them on my Avalanche with no problems for over 10,000 miles... I did a switch to turn them high manualy but, only have to do that in really hot weather in Stop and go traffic. Even if i forget it still runs just fine.

 

wait with an 03 and 5.3l you dont have the 34" radiator...do you...?? I think you have the 28" radiator and the 34" is on the 05 and up trucks and the trucks with the 6.0 in earlier years