For those who have upgraded to the 700w radiator fans, where are you buying them? Are you buying both or just the driver side? I have heard that if you run both, the electrical system has a hard time keeping up unless you upgrade that. Does it matter how many blades the fan is? I have a 2013 yukon xl denali and tow up north occasionally and see temps start to creep up on some hills. Not trying to drop too much money into it as I know some have done aftermarket radiators, fans and multiple set ups with trans coolers. Seems like anything over 3k RPM on the hills is when it starts to heat up. Was also thinking of installing 160 degree thermostat. I know they don't do much from a performance stand point but having it open at 160 vs 190 may delay the temps from creeping up a bit, or am I delusional in my thinking?