2003 Escalade EXT Pressure diff switch leak


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2003 Escalade EXT Pressure diff switch leak

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Auto Repair Home>> Automotive Repair>> Brake Repair Help

Longunns
New User

Jul 19, 2018, 8:19 AM

Post #1 of 4 (1293 views)

2003 Escalade EXT Pressure diff switch leak	Sign In

Installed front brakes on my 03 Escalade ext. and now have no pedal and the pressure differential switch is leaking. When I installed the brakes, I did not crack the bleeder to retract the piston. I have replaced the pressure differential switch. Still leaks. Thanks in advance.

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jul 19, 2018, 9:02 AM

Post #2 of 4 (1283 views)

Re: 2003 Escalade EXT Pressure diff switch leak	Sign In

Obviously, if you have a fluid leak you will have no brakes and the leak has to be resolved. If you replaced the switch and still have a leak, maybe the switch wasn't the problem in the first place or maybe you got a bad one. Either way, replacing brake pads shouldn't result in a leaking system.

From the sounds of it, you are over your head in this repair and the brake system is no place to be making mistakes.

I suggest you cut your losses and let a professional sort it out.

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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

Longunns
New User

Jul 19, 2018, 3:51 PM

Post #3 of 4 (1258 views)

Re: 2003 Escalade EXT Pressure diff switch leak	Sign In

Thanks for the info and the advice. However after a bit more digging I found that the plunger in the combination valve was stuck. AC Delco part #21998450. Replaced it, bled the brakes and it's good to go.

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jul 19, 2018, 4:13 PM

Post #4 of 4 (1253 views)

Re: 2003 Escalade EXT Pressure diff switch leak	Sign In

The only way that happens is a severe imbalance between circuits causing the slide valve to get jammed at one end. Improper bleeding causes that. That shouldn't have anything to do with a leak though.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

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