Where is the ecm module on a 88 Chevy Silverado?

On a 1988 Chevy Silverado, the ECM (Engine Control Module) is typically located under the hood, on the passenger side fender well. However, the exact location can vary slightly depending on the specific engine and trim level. It's often mounted to the inner fender apron and might be covered by a plastic shield. You'll likely need to look closely and possibly remove some panels to find it.