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I'm going to replace the radiator on my '97 with a manual transmission. I ordered the factory replacement AC Delco radiator:
"ACDELCO 20889 {#20931, 52470606, 52474697} GM Original Equipment Info
FitsTrans. code MM6; CORE SIZE 24-7/8IN X 17-1/8IN X 7/8 IN, CODE KDM,BBK; 6 speed Manual transmission
OrCORE SIZE 24-7/8IN X 17-1/8IN X 7/8 IN, CODE KDM; 4 speed Automatic trans."
It seems it's the same radiator for both auto and manual transmission cars. Since I don't have automatic transmission oil cooler lines to connect to the radiator, is there a plug or something that will block these off?
Chances are very good that it comes with plastic caps over the openings for the trans fluid inlet/outlet lines. With a little black RTV Silicon spread over the caps to insure they don't fall out you should be fine.