1999 GMC Yukon Anti-Lock Brakes Pulsing Incorrectly

JIMWINDSTAR

MEMBER
1999 GMC YUKON
V8
4WD
AUTOMATIC
187,000 MILES

My anti-lock brakes pulse prior to stopping when the road is not slippery - or as if there is a slippery surface when it isn't.

Is there something obvious-e.G. A disconnected wire or something?

Wednesday, September 23rd, 2009 AT 7:36 AM

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,645 POSTS

Has the ABS light come on? Also, check the sensors at each wheel. Chances are one is damaged or disconnected.

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Monday, October 5th, 2009 AT 11:02 AM

JIMWINDSTAR

MEMBER
2 POSTS

No-my ABS light has not come on and nothing seems disconnected.

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Monday, October 5th, 2009 AT 6:06 PM

JACOBANDNICKOLAS

MECHANIC
109,645 POSTS

Check closely for damage to the wiring going to the sensors. I've seen many that were rubbed through or broken. Also, I will assume you made sure the brake fluid is full.

Has the ABS light ever come on? If not, there may be a problem with the computer. You may want to have the computer scanned even though the light hasn't come on. Most parts stores will do it for free.

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Monday, October 5th, 2009 AT 8:20 PM