FYI - From Light & medium Truck magazine:



"U.S. regulators are investigating the brakes used on some 1.3 million General Motors vehicles in what could turn into a costly recall, according to UPI. The National Highway Traffic Safety Administration is investigating whether a defect exists in anti-lock brakes on 1.3 million 1999-2002 Chevrolet Silverado and GMC Sierra pickups sold in the United States, as well as Chevrolet Suburban, Tahoe, and GMC Yukon sport utility vehicles, the Detroit news reported.

If an anti-lock brake sensor malfunctions, it can engage at low speeds, cutting driver control and extending stopping distances."

so now what?

What is GM fix on this problem - Replaced anti-lock Brake sensers. Sounds like what happen when Brakes applied when needing to stop quickly truck braking time is extending stoping distance with trailer.

I believe the problems are on the 1/2 tons, not our 2500HD/3500's, but hey, I've been wrong before!

I believe the problems are on the 1/2 tons, not our 2500HD/3500's, but hey, I've been wrong before!


I can tell you that the brakes on my '99 K2500 suburban flat out SUCK. They should have recalled this year/model vehicle for disc brake fittment.
But we all know better than that..
Ricky...seeya...

I had this EXACT problem on my '98 Chevy. Took it to the dealer, they fixed it finally after having it for 3 days trying to figure out what the problem was. Due to a so-called hidden warranty, they fixed it for nearly nothing. The hubs apparently corrode causing the sensors to fool the computer into thinking you're driving faster than you are. The truck came from up north in case you're wondering. The salt is what kills em. It sucks when you're pulling a boat and you come up behind somebody, barely moving like in stop-n-go traffic and you CANNOT STOP w/ your foot on the pedal to the floor the whole time, you hit/bump them, they get out and yell WTF ?! Imagine it being a pedistrian instead of a car...

Tim

Actually, the salt buildup in the sensor blinds the sensor to the movement of the wheel and your brakes will not apply because the ABS thinks the wheel is locked and releases the brake to stop the lock and won't reapply since it sees no movement. I also believe it is for the light-duties and Yukon/Denalis and our HDs are not included.

Actually, the salt buildup in the sensor blinds the sensor to the movement of the wheel and your brakes will not apply because the ABS thinks the wheel is locked and releases the brake to stop the lock and won't reapply since it sees no movement. I also believe it is for the light-duties and Yukon/Denalis and our HDs are not included.
hey, your HD is considered light duty too! http://img3.harmony-central.com/acapella/ubb/mad.gif

Okay, "lighter duties," you know, HD wannabees!):h

no its for the hds too. i got a paper in the mail 4 days after i totalled my truck

Dealer told me yesterday that the recall will come out in November. According to him it is to clean the sensors. My wife has a 2000 Astro which has the problem but so far it is not included in the recall.
They think that they will be able to take off the sensors and clean them. Best of luck they are all rusted together on any I have seen. -:t
I just pulled the ABS fuse no more problems ( then again no abs) but she knows how to drive.:eek:

This is actually not an uncommon problem. I worked on a Dodge 1500 Ram that had the same problem. Above 15 MPH, the brakes worked normal as could be. Below 15 MPH, it was like trying to stop on glaze ice. The problem was the wheel speed sensor itself. This one was located in the rear differential housing and reads off of the tone wheel installed between the differential carrier housing and the ring gear. It (and for that matter, all ABS Sensors) produces an A/C signal, that gets converted into a D/C pulse that the ABS computer interprets as wheel speed. The sensor was making an erratic and choppy signal, instead of a smooh A/C sinewave, which in turn was converted into a digital signal that dropped to 0 mph as soon as actual speed dropped below 15 mph. Then the ABS computer went nuts, clickin' and poppin' and pushin' the pedal up off the floor. The sensor built up too much internal resistance, and at higher speeds, produced enough voltage to overcome this resistance, but at lower speeds, just dropped the signal, and nearly caused the driver to hit 3 pedestrians crossing the street. He ditched the truck into a telephone poll instead. I found the problem, when I was working on the truck, and got him off the hook. Chrysler paid for all he repairs to the truck after that. I have also heard of Fords with this problem too. I think it's an industry wide cover-up, but then, I am just a cooky conspiracy theorist....