US21A - UltraStop P32 Upgraded Park Brake Actuator Pressure Switch

US21A - UltraStop P32 Upgraded Park Brake Actuator Pressure Switch

Part# US21A

This kit Replaces GM Part Numbers:

  • GM# 10218778
  • Workhorse Part# W8001071


  • All P-Chassis 1996-2004 that use an automatic apply parking brake system with an electricly driven hydraulic pump.


  • Replaces the factory "High Failure" pressure switch on the actuator which has the same failure issues as the factory "Grey Switch" does.
  • This pressure switch is rated at one million cycles of operation.
  • There is a Life Time replacement warranty to the original purchaser.
  • Easy installation and comes with instructions.



Write a review

Please login or register to review

 The state of California requires that this warning be posted for people purchasing products that reside in California.

WARNING: Products may contain one or more chemicals known in the State of California to cause cancer and/or birth defects or other reproductive harm. For more information, visit

VIN Verification Service Item

This product allows for a VIN verification service.

  • This is a service that we provide free of charge when a part is purchased.
  • When you provide your VIN below we will personally verify your part selection by your VIN before shipment of your order.
  • This helps ensure that this is the correct part for your vehicle.
  • This is not an automatic VIN check, it is done by a parts specialist once order is placed.
  • We can only VIN verify vehicles back to model year 1996, if older we can help but can't guarantee fitment.
  • If you would like to have your part selection verified before purchase please call or email us.
  • Views: 5510
  • Product Code: US21A
  • Availability: In Stock
  • $160.65
  • $119.00

Available Options