Does anyone have any leads for a heavy duty radiator for 2001 S10 Blazer, 4.3L engine. Radiator is adequate on the road and in town, but when parked and idling in the sun, above 95 degrees, temperature rises from normal ~200 degrees to 235, and the A/C shuts down. As soon as I drive a block or two, temperature drops to normal range. I'm also concerned about towing capability above 100 degrees ambient temperature. I'm in west Texas, so we're hitting 100 degrees most days in the summer, and 110+ degree temps are not unusual.