Where is the engine control module located on a 1999 Chevy S-10?

The Engine Control Module (ECM) on a 1999 Chevy S-10 is typically located under the hood, near the firewall on the passenger side. However, the exact location can vary slightly depending on the engine and options. It's often mounted to a bracket or secured to the inner fender. It's usually a fairly large, rectangular black box with various connectors attached.

To be certain, it's best to:

* Consult your owner's manual: This should have a diagram showing the location of major components, including the ECM.

* Use a repair manual specific to your 1999 S-10: These manuals often provide detailed diagrams and instructions.

* Search online for "1999 Chevy S-10 ECM location" along with your engine size (e.g., 4.3L, 2.2L): Images from other S-10 owners might help you pinpoint it visually.

Do not attempt any repairs or modifications to the ECM yourself unless you have the proper knowledge and tools. It's a sensitive component, and incorrect handling could damage it.