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Thanks for the input.
The Metro fan is smaller, but I think the radiator is oversized to start with.
This truck has almost the exact same engine as my wife's Pontiac Sunfire, which has a much smaller radiator and fan.
I figure this is something I can play around with. I will keep the original fan so I can put it back on if needed. The fan is pretty hefty. I can't imagine this NOT making a difference in fuel economy.
I think I will start with a relay and a dashboard switch and watch the temperature gauge.
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