Having troubvlew with s 10 ignition system. need

The 'coil tower' is/are two Ignition Control Modules. These are located on the right side of the engine, right above the Crankshaft Position Sensor, which is located close to the oil pan rail. (Sitting in the truck, the passenger side is the right side)

Viewing from the bottom of the truck, look straight up from the oil pan drain plug.