2005 chevy trailblazer_lt_ext
05 Trailblazer L6, 2wd. First trip towing our 16 ft 2500 lb Fun finder X RV. Got hot on I45 in Texas, pulled over on an exit n water was coming out of filler tank. Unhooked n managed to get it home via tow truck n got another vehicle....back to RV, hooked up n off camping. Today I fired it up and it runs perfect. No heat issues, no water leaks anywhere! No oil in water (thought I blew a head gasket but now don't think so). I bought it used and am wondering if the yahoos I bought it from put another radiator in it, smaller which might have caused my problem. How do I tell if it is the correct tow pkg radiator? And, how do I tell if my TB in fact has tow pkg? Has receiver hitch n RV plug in. Called stealership they said my TB was to old for their computer to pull up any info????? Right! Recently did following....new water pump n thermostat, fan clutch assembly, belt. As mentioned, did a banzi run today and plenty of power n stayed right at 195 degrees, no water loss. Any input?