Question about 2001 GMC Yukon

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How do i replace a speed sensor on a 2001 yukon

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Look on the differential, that is where the speed sensor is normally located, if not there,check on the front of the transmission. All GM motors from 96 and up are electronic sensor for speed.

Posted on Oct 16, 2010

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if this issue is at low speed roughly five to ten mph it is a sign of a bad wheel bearing as the abs speed sensor reads off of a tone ring attached to the front bearings, when the bearing gets too much play it causes the sensor to receive an eratic signal making the on board computer activate the abs thinking the vehicle is sliding

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My 2001 yukon xl 1500 consistently flashing check engine light when cruising at high speed downhill after running for ~30 minutes. The engine preformance appears unchanged while the light is flashing. ...


OK, if you have a misfire at a high rate of speed and it is intermittent, I wouldn't worry about it unless it makes the engine lose power or affects gas mileage.

If you want the engine to work perfectly, however, I would find out which cylinder is missing, and correct the problem by replacing coil packs or what not until it doesn't do this anymore.

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I have an engine code PO332 knock sensor 2 circuit low imput bank 2 what is this problem .the car is a 2001 gmc yukon xl .


The most likely cause of your code is a bad rear knock sensor. You should check the knock sensor wiring harness for corrosion. But if that checks out the sensor will have to be replaced. The knock sensor is under the intake manifold, although it's not too difficult to remove. Both knock sensors should be replaced along with the wiring harness, just because of labor involved in gaining access to the sensors. You could try clearing the code, it may stay off for a long time.

May 23, 2010 | 2001 GMC Yukon XL

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I have a 2000 GMC Yukon XL 1500. The antilock braked engage when slow to about 5 to 8 mph.


Here is a copy of a GM bulletin that applies to you concerns of low speed ABS activation.

Antilock Brake (ABS) Activation At Low Speeds (Clean Wheel Speed Sensor Mounting Surface) #03-05-25-007 - (09/29/2003)
Antilock Brake (ABS) Activation At Low Speeds (Clean Wheel Speed Sensor Mounting Surface)

1999-2004 GMC Yukon XL

Condition:
Some customers may comment on ABS activation at low speeds, usually below 8 km/h (5 mph). Upon investigation, the technician will find no DTCs set.

Cause
The cause of this condition may be an increased air gap between the wheel speed sensor and the hub reluctor ring due to rust and debris built up on the sensor mounting surface.

Correction
Measure AC voltage and clean the wheel speed sensor mounting surfaces.

Raise and support the vehicle.
Disconnect both the front wheel speed sensor (WSS) connectors at the frame and harness.
Place a Digital Volt Meter (DVM) across the terminals of each WSS connector.
Rotate the wheel clockwise approximately one revolution per second. The minimum reading should be at least 350 ACmV's. If the reading is less than 350 ACmV's, remove the wheel speed sensor. Refer to the applicable Wheel Speed Sensor Replacement procedure in the ABS sub-section of the Service Manual. Plug the WSS bore in order to prevent debris from falling into the hub during service.
Clean the WSS mounting surface on the hub to remove any rust or corrosion using a wire brush, or equivalent.

Important
Make sure that the sensor sits flat on the hub. Check the sensor flange against a straight edge to ensure flatness. If the sensor flange is distorted, replace the sensor.

Apply a thin layer of bearing grease to the hub surface and sensor O-ring prior to sensor installation. Use ONLY Wheel Bearing Lubricant, P/N 01051344.
Install either the original sensor or a new one in the hub. Ensure that the sensor is seated flush against the hub. Refer to the applicable Wheel Speed Sensor Replacement procedure in the ABS sub-section of the Service Manual.
Place the DVM across the sensor terminals and recheck the voltage while rotating the wheel. The voltage should now read at least 350 ACmV's.

Good luck and thank you for using Fixya.

Mar 09, 2010 | 2000 GMC Yukon XL

1 Answer

I have a 2002 gmc yukon. When i press my brakes my antilock brakes go off and stopping is tough. what could this be?


you need to connect a diagnosing scan tool and go for a drive. during an ABS event, watch the values of the wheel speed sensors on the scan tool. chances are one will not be accurate, causing the abs to activate. the sensors are integral to the wheel bearings, and are changed as a complete unit. this is a common failure. good luck!

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If your scan tool shows - " READINESS MONITORS ok- You are all set. Just replaced all 4 O2 sensors and CATS on a 1996 Yukon & I have an Autoxray EZ5000 scanner which gave me the same readings but the truck passed emissions here in mass.

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Mar 09, 2009 | 2001 GMC Yukon XL

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