1988-1994 Chevrolet S10 Blazer Windshield Washer Pump - White

Will this pump work with the original washer hose and nozzles?

Yes. This pump mounts at the factory location and connects to existing hose routing — no modifications to the washer system needed.

Do I need to drain the washer fluid reservoir before swapping the pump?

You can, but it's not required. Access the pump from under the hood and disconnect the hose before removal — fluid will drain slowly through gravity once the hose is loose.

What if the pump doesn't cycle after installation?

Check that the motor connector is fully seated and the fuse hasn't blown. If spray still won't activate, test for power at the connector using a multimeter — refer to your vehicle's service manual for circuit details.