has any one put an after market Transmission oil cooleron the07 tahoe like b&m, and can any one tell what the ome Transmission oil cooler is rated at ??

 

What do you mean "rated" at? It's designed for the Tahoe, so naturally, it's rated for the Tahoe, along with its max towing capacity. I wouldn't recommend "maxing" out the tow capacity on a Tahoe though. Aftermarket trannscooler or no.

Still, an additional cooler can't hurt.