1. Simple Flushing and Pressure:
* Check the Washer Fluid Reservoir: Make sure you have plenty of washer fluid in the reservoir. Low fluid can exacerbate clogging.
* Use Washer Fluid: Try spraying the washer fluid repeatedly. Sometimes, the sheer force of the fluid can dislodge a blockage.
* Increase Pressure (Carefully): If you have a higher-pressure washer bottle (some aftermarket ones offer this), use it. Be cautious not to damage the nozzle with excessive pressure.
2. Needle or Pin:
* Locate the Nozzle: Carefully locate the blocked nozzle.
* Use a Thin, Clean Object: Use a very fine needle, a straightened paperclip, or a similar thin, clean object to gently poke and clear the blockage. Be extremely gentle to avoid damaging the nozzle. Work from the inside of the nozzle, pushing outward.
3. Compressed Air:
* Low Pressure: Use compressed air (like from a can of compressed air for electronics) to gently blow out any debris from the nozzle. Keep the pressure low to avoid damaging the nozzle. Hold the nozzle from the back and point the air toward the opening.
4. Soaking and Flushing:
* Soaking: If the above methods fail, try soaking the nozzle with a mixture of warm water and white vinegar. This can help dissolve mineral deposits or other substances that may be causing the blockage. Allow it to soak for a few minutes before trying to flush it again.
5. Removal and Cleaning (More Advanced):
* This is a more involved process that requires more mechanical skill: You might need to remove the nozzle itself (often held in place with a clip or small screw). Once removed, you can thoroughly clean it with a small brush, compressed air, or a pin. Be careful to note how it's assembled before removing it so you can put it back correctly. Refer to a repair manual for your specific Envoy model if you attempt this.
Important Considerations:
* Multiple Nozzles: If one nozzle is blocked, others may also be affected. Check all the nozzles.
* Frozen Fluid: In cold weather, the washer fluid may be frozen, causing a blockage. Use de-icer fluid to thaw the system.
* Professional Help: If none of these methods work, it might be time to consult a mechanic or auto repair shop. There could be a more serious blockage further up the system.
Remember to always be gentle when working with the delicate nozzles to avoid causing more damage. Always consult your owner's manual or a repair manual for more detailed instructions specific to your 2007 GMC Envoy.
