As a fellow 1995 Trans Am owner, lemme tell you, you're boned. The T/A LT1 and LS1 both have so-called "dry intakes" meaning no coolant passes through the intake. Instead, there are runners or tubes that pass the coolant from one bank to the other, eq'ing pressure. If you look at your intake (not hard to do. Pop the hood) you'll notice the coolant lines (both from the radiator and going to the heater core - the one to the heater core is the one with the metal piece and the small screw - the air bleeder valve is the proper technical term) both go into the block/heads directly, and underneath the elbow (90*) is your thermostat. The intake, being dry, means the coolant can only be getting in one of 2 ways:
1. The head gasket / warped head. PRAY this is you.
2. The block (very rare, but possible; LT-1s are Reverse Coolant Flow, and the head gets the colder coolant, which then passes down to the block, so head temps are lower, which they should be, while block temps are higher, which is also ideal). I'd vote for head gasket/head, while it's rare, if it was overheated (with stock settings of 180* thermostat and fans not activating until 215+ F) it's quite possible. Most tended to run 225-235, and city traffic would cause high operating temps, and later, blown head gaskets.
If you do replace the head gasket, I'd recommend either reprogramming fan temps or installing a manual override switch (keep automated control, but add manual overrides) and a 160* thermostat, which will keep your engine temps lower where they belong. Just my.02, take it or leave it (also ask it on LS1Tech, I bet they recommend the same thing, and say the same thing I told you).
Borg-Warner Engineer (laid off)
Regular mechanic (rebuilt my first engine at 13, built a Pro Stock motor at 17)
Tuesday, October 19th, 2010 AT 4:35 PM