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US21A - UltraStop P32 Upgraded Park Brake Actuator Pressure Switch

US21A - UltraStop P32 Upgraded Park Brake Actuator Pressure Switch


Order Shipment Notice: 

Most orders are shipped within 24 hours from the order date. Orders placed on the weekend or after cutoff on Friday, and orders placed on select holidays are processed on the next business day. Please see our shipping terms for more information.

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 electrically 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.
  • These have a Lifetime failure replacement guarantee to the original purchaser. (Part replacement only, no labor)
  • Easy installation and comes with instructions.



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 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.

  • VIN part verificaion 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: 29480
  • Product Code: US21A
  • Availability: In Stock
  • $160.65
  • $119.00

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