Where is the electronic spark control for a 1993 Chevrolet truck?

The electronic spark control for a 1993 Chevrolet truck, which is part of the ignition system, isn't a single, easily-identifiable component like an old-style distributor. Instead, the control is distributed across several parts and managed by the Powertrain Control Module (PCM), also known as the Engine Control Module (ECM).

You won't find a labeled "electronic spark control" unit. The PCM receives inputs from various sensors (like the crankshaft position sensor, camshaft position sensor, and others) and uses this information to determine the precise timing of the spark. It then sends signals to the ignition control module (ICM) or directly to the coil pack (depending on the specific engine). The ICM then controls the firing of the spark plugs.

Therefore, to find the relevant components, you'll need to consult a repair manual specific to your truck's engine (e.g., a 4.3L V6, a 5.0L V8, or a 5.7L V8, etc.). The manual will show you the location of:

* PCM/ECM: This is the brain of the operation. It's usually mounted somewhere under the hood, often near the firewall or on the inner fender.

* ICM (if equipped): If your truck uses an ICM, it will be a smaller module that interfaces between the PCM and the coil(s).

* Coil pack(s): These are located near the spark plugs, typically on top of the engine.

Without knowing the specific engine your 1993 Chevrolet truck has, providing a more precise location is impossible. A repair manual is absolutely crucial for proper identification.