Take the air cleaner off and look to the left of the throttle body housing and you will see a FLAT squire black plastic piece about the size of a pack of smokes but FLAT bolted to a bracket on the intake that will have a wide flat electrical connector pluged into it. That will be it.
V8
The ESC module is in the distributor
I believe in 93 they had the newer style computer, this eliminated the electronic spark control module.
Yes.
The 1990 Chevy Celebrity engine is distributorless, the ignition is handled by a combination of the engine control module(computer) and the ignition control module. You did not mention which engine the car has. If your car has the 4 cylinder engine the ignition control module is below the intake manifold at the rear of the engine. You can follow the spark plug wires to it. The coils are mounted to the ignition control module. If your car has the V6 the ignition control module is near the starter and again you can follow the spark plug wires to it. Again the coils are mounted to the ignition control module.
Where is the electronic spark control located a 1995 Chevy Tahoe
Looking from front of truck, it is mounted on top of the engine, left of the throttle body.
The spark control module on a 1989 Chevrolet model van is located in the distributor. To check its life, one must remove the distributor cap and unplug the center coil wire. Replace with a clean, brand new spark plug, and test the van's ignition.
ignition module is located under the distributor, where the spark plugs come out to go to the spark plugs, remove 6 bolts that hold the 3 capped distributor on, unplug the wires from both ends of module, 3 plugs, lift module out, nothing holds it in after distributor is removed, plug new module in, replace distributor.
I would replace the ignition control module that's in the distributor.
its inside the distributor.
If it is the 2.2 ecotec engine, it is located on the spark plug cover withe ecotec logo on it. It is a little square with wires and heat fins on it.