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Where is the ecm on a 1991 S10 Chevy pickup truck?

The ECM (Engine Control Module) on a 1991 Chevy S10 pickup truck 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 installed in your specific truck. It's often mounted to the inner fender well or a nearby bracket.

To be sure, you should:

* Consult your owner's manual: This is the best source of information for the specific location in your vehicle.

* Look for a large, rectangular black box with wiring harnesses connected: The ECM is usually a fairly substantial unit.

* Check online forums or resources specific to 1991 Chevy S10 trucks: Searching for "1991 S10 ECM location" on forums like S10 forums or YouTube might yield pictures from other owners that can help you pinpoint it.

Be cautious when working around the ECM; avoid jarring it or getting it wet.

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