My 1997 Pontiac Trans Am has a overheating problem. I was told the gaskets needed replacing. replaced them and it still over heats. replaced engine and still overheats. what do i do now?

Has the radiator ever been checked?

Either you got another overheating engine (unlikely) or one of the components that stayed with the car is at fault. "Astre" is right about the radiator. Also, exhaust restriction, bad Cat, heater core, blocked exhaust manifold, stuck exhaust heat riser, blocked or collapsed hoses, super rich fuel, wrong plugs, wrong timing, it goes on from there. It's okay to use the harness from the 97 with the 98 engine, but has anyone actually run all the codes down and made sure everything is communicating?

The shop I took it to said that they could not communicate with the computer to see if it was sending the signal to the fans when to come on (high or low). The fans are temporairly hot wired to come on high as soon as the car is turned on. they say that i won't pass emissions with the car this way. I need to take the emissions test at the end of the month. I am not very mechanically inclined so I have been paying a lot of cash to different shops & people. I really like this car, always have since I was a teenager, I'm 54 now, but I cant afford to keep dishing out money to people that cannot fix the problem or know what the problem is. Now, every time I drive the car I have to make sure the radiator is filled before I drive it. There is no antifreeze leaking under the car but after I drive it i have to top off the radiator with fluid to keep the car from overheating. I do not have antifreeze in my oil or vise versa. Does this mean the gaskets are blown again? I have replaced the radiator, water pump, starter & now the engine and it's still overheating. what should I do?