I've just discovered a radiator leak in my 97 GMC 1/2 ton in the oddest place. It appears to be leaking where the transmission line makes a connection at the top drivers side of the radiator. The nut looks like some sort of spanner type nut and I thought I'd try to get some pointers here before doing anything to tighten the nut (so as not to make the vehicle immediately not-drivable).
Take a look at this pic if you would...
Any advice is greatly appreciated.
TIA, John