US21 - UltraStop P32 Park Brake Pressure Switch Upgrade Kit

US21 - UltraStop P32 Park Brake Pressure Switch Upgrade Kit

Part# US21

This kit Replaces GM Part Numbers:

  • Green Switch (At Pump) GM# 15961566 - Also AC Delco# 15034355 (Rotten Green Switch)
  • Grey Switch (At Actuator) GM# 10218778


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


  • This kit comes with two replacement pressure switches that replace the two factory "High Failure" Pressure Switches.
  • One is commonly known as the "Rotten Green Switch" that controls the pump.
  • The other switch that is replaced is the Grey colored pressure switch at the actuator that controls the "Auto Park" light on the dash.
  • These pressure switches included in the kit are rated at one million cycles of operation.
  • These are a Lifetime replacement guarantee to the original purchaser.
  • Easy installation and comes with instructions.



My system works fine but I want to upgrade the system to avoid a problem. Can you tell from my VIN if I have an early or late 1995?

What generation system is mine?

What parts do you recommend be proactively replaced to ensure the system is reliable?

Steve D.
( steven dunsford, 08/01/2017 )


This is a later model 1995 and would definitely benefit from our US21 switch kit. I would actually recommend the US22 kit in your case since it would come with an updated relay and steel bushing adapter for the pump switch. The only other failure prone part at the age of your coach is the actuator which can be replaced with part# W8000504N.

( Support )
Description states lifetime replacement for original purchaser but the instructions in the PDF say there is only a two year warranty. Which is it? ( Richard, 07/04/2016 )


We apologize for the confusion. These DO have a lifetime warranty. We will be changing the instructions to reflect this, thank you for pointing it out!

( Support )

Will us21park brake pressure switch fit this viv number

( Raymond E.Parent, 07/15/2015 )


Yes, your VIN indicates that you have an electric park brake pump so the US21 would be the correct kit to replace both the Rotten Green Switch and grey switch at the actuator.

( Support )

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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.

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  • $295.65
  • $219.00

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