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The mech. fan driven off the engine takes power from the engine and more gas. A electric fan frees gas powered power.There are universal ones or you can find a factory setup that fits.a coworker used a mid 2000s Impala dual fan on his suburban and it worked well for him.you can wire it to a toggle switch or temps switch to kick on at a set temp.
the grille block will block air but you can block some but not all depends on city or highway driving that you do.you can play around with tape if it runs hot remove some tape.good luck
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