Where is electronic spark control module located on a 92 S10 blazer?

The Electronic Spark Control (ESC) module on a 1992 S10 Blazer isn't a standalone component like a distributor in older vehicles. The function of the ESC module is integrated into the Powertrain Control Module (PCM), often called the Engine Control Module (ECM).

Therefore, you won't find a separate "ESC module." The PCM is usually located under the dash, or sometimes under the hood, depending on the specific trim level and engine. It's typically a large, rectangular black box with numerous connectors. A diagram in your owner's manual or a repair manual for your specific year and engine will be the best way to locate it.