The ignition control module on a 2000 Blazer with the 4.3 is mounted on the same bracket that the coil is mounted to.
I believe in 93 they had the newer style computer, this eliminated the electronic spark control module.
The ESC module is in the distributor
1995 and earlier models use a separate ESC module mounted near the throttle body of TBI
in the distributor cap
Where is the electronic spark control located a 1995 Chevy Tahoe
Yes.
It advances and retards the engine timing as needed.
Right next to the gas moduale
Generally if the spark control module on an engine is bad, the car will run roughly. It will likely miss and die at low idle speeds.
its inside the distributor.
ESC stands for Electronic Spark Control it may also stand for Electronic Stability Control. The Electronic Spark Control module will retard the timing if it detects any spark knock or pinging or even other similar sounds made by the engine such as lifter knock.
Inside the distributor, under the rotor.