The Ignition Control Module (ICM) is located directly above the coil. If you remove the 2 bolts holding the coil on and then romove the coil mounting plate from the car you will see a small rectangular module with wires plugged into it. This is the ICM.
Under the cap, inside the distributor, it is easy to change with the distributor off the car, a pain to get to with it on the car.
The ignition module for a 1990 Pontiac Trans Sport with a 3.3-liter engine is located on the ignition coil assembly, which is typically found near the front of the engine, close to the intake manifold. To access it, you may need to remove the ignition coil cover. Make sure to disconnect the battery before attempting any repairs to avoid electrical shock or damage.
Try under the dash near the glove box.
The body control module (BCM) on a 1997 Pontiac Trans Am is typically located behind the dashboard, near the driver's side. Specifically, it can be found above the brake pedal, mounted on the metal support bracket. Accessing it may require removing some interior panels for better visibility and reach.
If you are standing at the front of the car, the module is located on the right side of the firewall by the windshield wiper motor....
intheintakemanifold
Center of the dash.
Gas Tank
I think there is no 96 Trans Am. The Trans Sport module is on the rear center of the engine. Remove and replace it with standard US or metric tools. There are three electrical plugs to remove from socket. The Trans am didnt die till 2002 there was one in 96.
Generally speaking you can clear trouble codes by either removing the fuse to the engine control module or by disconnecting the battery. In either case the ignition should be off. Hope that helps.
Inside the rear of the alternator
Probably in the 1997 Pontiac trans-am heater core valve holder. If not, you probably lost it. Both the valve, and your mind.