Where is the ignition module for 1993 Chevy Glazer?

The 1993 Chevy Blazer's ignition module isn't a standalone unit like in some older vehicles. Instead, the ignition control module (ICM) is integrated into the distributor. Therefore, you'll find it inside the distributor which is located on the engine. You'll need to access the distributor to find it. Because it's integrated, you likely won't be able to replace just the ICM; replacing the entire distributor assembly is usually necessary.