Low Speed Abs Activation

[Beer Belly]

I read on a previous post about a recall on unintended low speed ABS activation ( http://www.gm-trucks.com/forums/index.php?showtopic=102556 ). My Production date is 8/05, and I am experiencing this problem...my dealer states that the recall was for late 90's to 2000 model year...just called GM and they state there is no such recall for my, or any other GM trucks on low speed ABS...what gives ???....is there a recall???

[MS3DALE]

Heres the recall,Your truck is NOT involved....

 

 

Service Information

2000 Chevrolet Chevy K Silverado - 4WD | Sierra, Silverado, Suburban, Tahoe, Yukon (VIN C/K) Service Manual | Campaigns | Safety | Document ID: 2075809

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#05068C: Product Safety - Front Wheel Speed Sensor Corrosion - (Mar 6, 2008)

 

 

Subject: 05068C -- FRONT WHEEL SPEED SENSOR CORROSION

 

 

Models: 1999-2002 CHEVROLET SILVERADO

 

2000-2002 CHEVROLET TAHOE, SUBURBAN

 

2002 CHEVROLET AVALANCHE

 

1999-2002 GMC SIERRA

 

2000-2002 GMC YUKON, YUKON XL

 

LOCATED IN THE SEVERE CORROSION AREAS LISTED BELOW

 

 

 

 

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Some breakpoints in this bulletin have been revised. Additional vehicles that have moved into the severe corrosion areas have been added. Please discard all copies of bulletin 05068B, issued April 2006.

 

 

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Condition

General Motors has decided that a defect, which relates to motor vehicle safety, exists in certain 1999-2002 Chevrolet Silverado, 2000-2002 Chevrolet Tahoe, Suburban, 2002 Chevrolet Avalanche, 1999-2002 GMC Sierra, 2000-2002 GMC Yukon, Yukon XL vehicles located in the areas listed below. These vehicles may have a condition permitting corrosion to occur between the front hub/bearing assembly and the wheel speed sensor. If the brakes are applied while the vehicle is traveling at a speed of greater than 6 km/h (3.7 mph) but less than 16 km/h (10 mph), the corrosion may cause an unwanted anti-lock brake system (ABS) activation. If this condition occurred where stopping distance is limited, a crash could occur.

 

• Connecticut

 

 

• Delaware

 

 

• District of Columbia

 

 

• Illinois

 

 

• Indiana

 

 

• Iowa

 

 

• Maine

 

 

• Maryland

 

 

• Massachusetts

 

 

• Michigan

 

 

• Minnesota

 

 

• Missouri

 

 

• New Hampshire

 

 

• New Jersey

 

 

• New York

 

 

• Ohio

 

 

• Pennsylvania

 

 

• Rhode Island

 

 

• Vermont

 

 

• West Virginia

 

 

• Wisconsin

 

 

Correction

Dealers are to inspect, clean, and treat the affected area. In some cases, the front wheel speed sensor may require replacement.

 

Vehicles Involved

Involved are certain 1999-2002 Chevrolet Silverado, 2000-2002 Chevrolet Tahoe, Suburban, 2002 Chevrolet Avalanche, 1999-2002 GMC Sierra, and 2000-2002 GMC Yukon, Yukon XL vehicles located in severe corrosion areas and built within these VIN breakpoints:

 

Year

Division

Model

From

Through

 

2002

Chevrolet

Avalanche

2G100011

2G363853

 

1999

Chevrolet

Silverado

X1100007

X1299263

 

1999

Chevrolet

Silverado

XE100013

XE256726

 

1999

Chevrolet

Silverado

XZ100014

XZ214615

 

2000

Chevrolet

Silverado

Y1100007

Y1409278

 

2000

Chevrolet

Silverado

YE100004

YE433948

 

2000

Chevrolet

Silverado

YZ100007

YZ371929

 

2001

Chevrolet

Silverado

11100003

11408135

 

2001

Chevrolet

Silverado

1E100046

1E346619

 

2001

Chevrolet

Silverado

1F106154

1F213776

 

2001

Chevrolet

Silverado

1Z100004

1Z335173

 

2002

Chevrolet

Silverado

21100010

21430583

 

2002

Chevrolet

Silverado

2E100039

2E306055

 

2002

Chevrolet

Silverado

2F100022

2F249730

 

2002

Chevrolet

Silverado

2Z100022

2Z348507

 

2000

Chevrolet

Suburban

YG10006

YG229688

 

2000

Chevrolet

Suburban

YJ100096

YJ209572

 

2001

Chevrolet

Suburban

1G100028

1G289556

 

2001

Chevrolet

Suburban

1J100018

1J318221

 

2002

Chevrolet

Suburban

2G100306

2G363792

 

2002

Chevrolet

Suburban

2J100007

2J343575

 

2002

Chevrolet

Suburban

2R199712

2R327763

 

2000

Chevrolet

Tahoe

YJ100003

YJ211862

 

2001

Chevrolet

Tahoe

1J100047

1J318217

 

2001

Chevrolet

Tahoe

1R100005

1R228102

 

2002

Chevrolet

Tahoe

2J100043

2J344546

 

2002

Chevrolet

Tahoe

2R109204

2R330531

 

1999

GMC

Sierra

X1500002

X1571274

 

1999

GMC

Sierra

XE500010

XE851658

 

1999

GMC

Sierra

XZ500014

XZ540991

 

2000

GMC

Sierra

Y1100005

Y1409250

 

2000

GMC

Sierra

YE100026

YE901599

 

2000

GMC

Sierra

YZ100024

YZ370502

 

2001

GMC

Sierra

11100009

11408106

 

2001

GMC

Sierra

1E100007

1E901430

 

2001

GMC

Sierra

1F106149

1F213708

 

2001

GMC

Sierra

1Z100045

1Z335202

 

2002

GMC

Sierra

21100003

21430563

 

2002

GMC

Sierra

2E100007

2E306397

 

2002

GMC

Sierra

2F100008

2F247747

 

2002

GMC

Sierra

2Z100013

2Z900932

 

2000

GMC

Yukon

YJ100002

YJ211863

 

2001

GMC

Yukon

1J100012

1J314635

 

2001

GMC

Yukon

1R100092

1R228070

 

2002

GMC

Yukon

2J100012

2J344554

 

2002

GMC

Yukon

2R113694

2R330419

 

2000

GMC

Yukon XL

YG100014

YG229685

 

2000

GMC

Yukon XL

YJ100172

YJ211810

 

2001

GMC

Yukon XL

1G100018

1G289600

 

2001

GMC

Yukon XL

1J100013

1J318175

 

2002

GMC

Yukon XL

2G100132

2G363800

 

2002

GMC

Yukon XL

2J100058

2J343335

 

2002

GMC

Yukon XL

2R225724

2R319698

 

 

Important: Dealers retailers should confirm vehicle eligibility through GMVIS (GM Vehicle Inquiry System) prior to beginning recall repairs. [Not all vehicles within the above breakpoints may be involved.]

 

For dealers with involved vehicles, a Campaign Initiation Detail Report (CIDR) containing the complete vehicle identification number, customer name and address data has been prepared and will be loaded to the GM DealerWorld (US) Recall Information. Dealers will not have a report available if they have no involved vehicles currently assigned.

 

The Campaign Initiation Detail Report may contain customer names and addresses obtained from Motor Vehicle Registration Records. The use of such motor vehicle registration data for any purpose other than follow-up necessary to complete this recall is a violation of law in several states/provinces/countries. Accordingly, you are urged to limit the use of this report to the follow-up necessary to complete this recall.

 

Parts Information

Parts required to complete this recall are to be obtained from General Motors Service Parts Operations (GMSPO). Please refer to your "involved vehicles listing" before ordering parts. Normal orders should be placed on a DRO = Daily Replenishment Order. In an emergency situation, parts should be ordered on a CSO = Customer Special Order.

 

Note: Very few vehicles will require front wheel speed sensor replacement; if required, order appropriate part from GMSPO.

 

Part Number

Description

Qty

 

89022217

Lubricant, Rust Penetrating (will service 50+ vehicles)

1

 

01051344

Lubricant, Wheel Bearing (will service 25+ vehicles)

1

 

 

Service Procedure

The following procedure provides instructions for repairing a corrosion condition where the front wheel speed sensor mounts on the front wheel bearing assembly.

 

Raise the vehicle on a suitable hoist and support as necessary.

Remove both front tires and wheels.

 

 

 

Compress the front brake caliper pistons.

3.1. Install a large C-clamp over the top of the caliper housing and against the back of the outboard pad.

 

3.2. Slowly tighten the C-clamp until the pistons are pushed completely into the caliper bores.

 

3.3. Remove the C-clamp from the caliper.

 

 

 

 

 

Important: It is not necessary to remove the front brake caliper from the bracket when removing the bracket in the next step.

 

Remove the two bolts that attach the front brake caliper mounting brackets to the knuckle.

Notice: Support the brake caliper with heavy mechanic’s wire, or equivalent, whenever it is separated from its mount, and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.

 

Remove the brake caliper and bracket as an assembly and support it with heavy mechanic’s wire or equivalent. DO NOT disconnect the hydraulic brake flexible hose from the caliper.

Mark the relationship of the rotor to the bearing hub.

If equipped, remove the rotor retaining push nuts from the wheel studs

 

 

 

Remove the rotor.

 

 

 

Remove the bolt (1) that attaches the wheel speed sensor to the bearing hub.

Notice: Carefully remove the sensor by pulling it straight out of the bore. DO NOT use a screwdriver or other device to try to pry the sensor out of the bore. Prying will cause the sensor body to break off in the bore.

 

Remove the wheel speed sensor from the bearing hub assembly.

 

 

 

Important: The mounting surface on the sensor must be flat in the next step in order to be mounted correctly on the bearing hub assembly. If the mounting surface on the sensor is warped or bent, the sensor must be replaced.

 

Inspect to see if the mounting surface on the sensor is flat. Check the mounting surface on the sensor head for flatness by placing it on the edge of a metal machinist’s scale or other suitable straight edge to measure the flatness. Check the sensor for flatness in multiple positions/directions (minimum 3).

• If the sensor mounting surface is NOT flat (1), the sensor must be replaced. Proceed to the next step and replace the sensor.

 

• If the sensor mounting surface IS flat (2), the sensor IS to be reused. Proceed to Step 16.

 

 

 

 

 

Remove the wheel speed harness mounting clips from the knuckle (4) upper control arm (3) and frame (2).

Disconnect the wheel speed harness electrical connector (1) from the vehicle wiring harness.

Connect the new wheel speed sensor harness electrical connector to the vehicle wiring harness.

Attach the wheel speed sensor harness to the frame, upper control arm, and the knuckle.

 

 

 

Temporarily plug the wheel speed sensor hole (1) in the bearing hub to prevent debris from entering it when you clean it.

Important: All rust and corrosion must be removed from the wheel speed sensor mounting surfaces on the bearing hub in the next step.

 

Using a wire brush, sandpaper, emery cloth, scotch brite, or equivalent, thoroughly clean the wheel speed sensor mounting surface (2) on the bearing hub to remove any rust or corrosion.

Using compressed air, remove all debris from the bearing hub surface.

Using a clean shop towel, clean the sensor and the O-ring.

Important: While the corrosion inhibitor is drying in the next step, begin performing Steps 3-20 on the opposite side front wheel speed sensor.

 

Apply (spray) two thin coats of the specified rust penetrating lubricant (corrosion inhibitor) listed in this bulletin, to the complete sensor mounting surface on the bearing hub. Allow to dry for 3-5 minutes between coats.

When the corrosion inhibitor is dry to the touch (about 10 minutes), apply a light coating of the specified grease to the complete sensor mounting surface on the bearing hub and to the sensor and O-ring.

Remove the temporary plug from the hole in the bearing hub.

Install the wheel speed sensor in the bearing hub and install the bolt. Ensure that the sensor is seated flat against the hub.

Tighten

Tighten the wheel speed sensor mounting bolt to 18 N·m(13 lb ft).

 

Disconnect the front wheel speed sensor connector and place a digital volt meter (DVM) across the terminals of the wheel speed sensor connector. Rotate the bearing at approximately one revolution per second. The minimum reading should be at least 350 ACmV’s. If the reading is less than 350 ACmV’s, the wheel speed sensor must be replaced. Follow Steps 12-15 for instructions on replacing the wheel speed sensor. This step must be repeated after the new sensor has been installed.

Notice: Whenever the brake rotor has been separated from the wheel bearing flange, clean any rust or foreign material from the mating surface of the rotor and flange. Failure to do this may result in increased lateral runout of the rotor and brake.

 

Important: If the rotor was removed using the jack screw method, you must ensure that the hub flange is free of nicks or marks caused by this procedure. Remove all raised nicks or marks before installing the rotor.

 

Align the rotor to its original position on the hub and install the rotor.

Install the caliper and caliper mounting bracket assembly.

Perform the following procedure before installing the brake caliper bracket mounting bolts.

27.1. Remove all traces of the original adhesive patch.

 

27.2. Clean the threads of the bolt with brake parts cleaner, or the equivalent, and allow to dry.

 

27.3. Apply threadlocker to the threads of the bolts.

 

Install the caliper bracket mounting bolts. Tighten the brake caliper mounting bracket mounting bolts to the specification listed below.

Tighten

 

• 1500 Series vehicles - 175 N·m(129 lb ft)

 

• 2500 Series vehicles - 300 N·m(221 lb ft)

 

Install the front tire and wheel assembly.

Tighten

Tighten the wheel nuts to 190 N·m(140 lb ft).

 

Complete Steps 21-30 on the opposite side front wheel speed sensor.

Lower the vehicle.

With the engine OFF, gradually apply the brake pedal to approximately 2/3 of its travel distance.

Slowly release the brake pedal.

Wait 15 seconds and repeat Steps 32-33 until a firm pedal is obtained. This will properly seat the brake caliper pistons and brake pads.

Customer Reimbursement

All customer requests for reimbursement for previous repairs for the recall condition will be handled by the Customer Assistance Center, not by dealers.

 

A General Motors Customer Reimbursement Procedure and Claim Form is included with the customer letter.

 

Important: (For GM US Only) Refer to the GM Service Policies and Procedures Manual, section 6.1.12, for specific procedures regarding customer reimbursement and the form.

 

Claim Information

Submit a Product Recall Claim with the information indicated below:

 

Repair Performed

Part Count

Part No.

Parts Allow

CC-FC

Labor Op

Labor Hours

Net Item

 

Inspect Wheel Speed Sensor (inc. cleaning)

0

N/A

N/A

MA-96

V1410

0.8

**

 

Add: Vehicles With 8-Lug Nut Wheels

0.1

 

Inspect & Replace One or Both Wheel Speed Sensor(s) (inc. cleaning)

1-2

--

*

MA-96

V1411

0.9

**

 

Add: Vehicles With 8-Lug Nut Wheels

0.1

 

Customer Reimbursement (CAC) (Repair will still need to be performed)

N/A

N/A

N/A

MA-96

V1412

0.2

***

 

* The "Parts Allowance" should be the sum total of the current GMSPO Dealer net price plus applicable Mark-Up for the front wheel speed sensor needed to complete the repair.

 

** The amount identified in the "Net Item" column should represent the actual sum total of the current GMSPO Dealer net price plus applicable Mark-Up for the actual amount of lubricants needed to perform the required repairs, not to exceed $0.75.

 

*** The amount identified in the "Net Item" column should represent the dollar amount reimbursed to the customer.

 

 

Refer to the General Motors WINS Claims Processing Manual for details on Product Recall Claim Submission.

 

Customer Notification

General Motors will notify customers of this recall on their vehicle (see copy of customer letter included with this bulletin).

[Beer Belly]

MS3Dale, Thank You for the info, I was getting conflicting information, your reply puts it all to rest with documentation. Sometimes people get confused between a recall and service bulliten...and then GM states there was no such problem for any model year...now that really mixes things up

[wages999]

My 2004 is doing the same thing. I found an old post a couple of weeks ago that detailed cleaning the ABS sensors. I can't find it right now. Keep searching, you'll find it.

[txab]

My 2004 is doing the same thing. I found an old post a couple of weeks ago that detailed cleaning the ABS sensors. I can't find it right now. Keep searching, you'll find it.

 

This thread has some instruction for cleaning. It's not detailed but you should be able to get it done.

 

http://www.gm-trucks.com/forums/index.php?...102556&st=0

[team3-8]

Anyone have any pics of this fix?