Manufacturer communication — 2006 GMC YUKON DENALI XL

• Applies to 2015 and prior GM passenger cars and trucks.

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  2015 and Prior GM Passenger Cars and Trucks

Possible causes

• Excessive ring gear runout may result in a first order tire speed or first order prop shaft speed concern.

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  Note that excessive ring gear runout may result in a first order tire speed or first order prop shaft speed concern.

Steps to confirm (in the document’s order)

1. Place the EVA sensor where the customer feels the vibration: on the seat track for a seat complaint, on the steering column for a steering wheel complaint.

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   As a reminder, place the EVA sensor where the vibration is felt by the customer or on the test drive i.e.: if the vibration complaint is from the seat then place the sensor on the seat track, if the vibration complaint is from the steering wheel then attach the sensor to the steering column.

2. The key is to look for the same Hz reading with the greatest amplitude G readings.

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   The key is to look for the same Hz reading with the greatest amplitude G readings.

3. If a system balance was attempted but the vibration remains or balance could not be achieved, check the ring gear backlash at each tooth of the ring gear.

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   If a System Balance has been attempted but the vibration is still present or system balance was not able to be achieved, check the ring gear backlash at each tooth of the ring gear.

4. Backlash readings at each ring gear tooth should not vary by more than 0.050 mm (0.002 in).

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   Backlash at each tooth on the ring gear (readings should not vary more than 0.050 mm (0.002 in)):

5. Wheel/tire runouts on the vehicle: maximum 0.050 in (1.27 mm).

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   Wheel/Tire Runouts on vehicle (max. 0.050 in (1.27 mm))

6. Mounting surface runouts (flange, hub): maximum 0.005 in (0.127 mm).

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   Mounting surface runouts (max. 0.005 in (0.127 mm))

7. Wheel stud runouts: maximum 0.008 in (0.203 mm).

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   Wheel stud runouts (max. 0.008 in (0.203 mm))

Repair

• When diagnosing vibration, use the worksheet together with the Vibration Analysis-Road testing procedure in the Vibration Correction sub-section of SI.

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  When diagnosing vibration concerns, use the following worksheet in conjunction with the appropriate Vibration Analysis-Road testing procedure in the Vibration Correction sub-section in SI.