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Does anyone know if the PCM on a 99 Chevy Suburban has pin out to turn on electric cooling fans like the 94-96 B bodies do? If not already there, can it be programed in. I'm wanting to swap out the 3.73 rear, the gas mileage is killing us, so prob be a pcm flash for gear change in the future.

Luckly this thing has a block heater I can plug in, cause with the belt driven fan it takes a long time to heat up. It reminds me of my 96 B4U Caprice, before the belt driven fan was removed, it never heated up enough in the winter. After electric fan swap I could get heat out the vents and the electric fans never turned on in winter here.

Thanks for any info on the pcm. I know I can get an external thermostat to mount to the radiator and trigger an electric fan relay, but wanted to know about the pcm pin out possibility first.
 

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