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NHTSA ID Number: 10096054
Manufacturer Communication Number: PIP5261A
Summary
THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN THAT SOME VEHICLES MAY HAVE A HIGH PITCHED WHINE NOISE FROM THE VEHICLE NOTICED WHEN DRIVING IN AUTO 4WD. WHEN THE TRANSFER CASE CONTROL MODULE HAS TO MOVE THE TRANSFER CASE ACTUATOR MOTOR THE HIGHER CURRENT PASSING THROUGH THE MODULE CAUSES AN “ELECTRONIC BUZZ OR WHINE” WITHIN SOME OF THE CAPACITORS IN THE MODULE THAT CAN BE HEARD BY SOME OF OUR CUSTOMERS. THIS CAN ONLY BE HEARD WITH ALL ACCESSORIES AND HVAC OFF AND ONLY WHEN ACTUATOR MOVEMENT IS REQUIRED. THIS DOES NOT INDICATE A CONCERN WITH THE MODULE AND SHOULD NOT BE REPLACED TO ADDRESS THIS CONCERN.
34 Affected Products
Vehicles
CADILLAC | ESCALADE | 2015-2016 |
| CADILLAC | ESCALADE ESV | 2015-2016 |
| CHEVROLET | SILVERADO 1500 | 2014-2016 |
| CHEVROLET | SILVERADO 2500 | 2014-2016 |
| CHEVROLET | SILVERADO 3500 | 2014-2016 |
| CHEVROLET | SUBURBAN | 2014-2016 |
| CHEVROLET | TAHOE | 2014-2016 |
| GMC | SIERRA 1500 | 2014-2016 |
| GMC | SIERRA 2500 | 2014-2016 |
| GMC | SIERRA 3500 | 2014-2016 |
| GMC | YUKON | 2014-2016 |
| GMC | YUKON XL | 2014-2016 |
SEOCONTENT-START
#PIP5261B: Faint High Pitched Whine Noise In Auto 4 Wheel Drive – (Feb 9, 2017)
| Subject: | Faint High Pitched Whine Noise In Auto 4 Wheel Drive |
| Brand: | Model: | Model Year: | VIN: | Engine: | Transmission: | ||
|---|---|---|---|---|---|---|---|
| from | to | from | to | ||||
| Chevrolet | Silverado 4WD | 2014-2017 | All | All | All | All | |
| Chevrolet | Silverado 1500 4WD | 2014 | All | All | All | All | |
| Chevrolet | Silverado 2500 4WD | 2014 | All | All | All | All | |
| Chevrolet | Silverado 3500 4WD | 2014 | All | All | All | All | |
| Chevrolet | Suburban 4WD | 2015-2017 | All | All | All | All | |
| Chevrolet | Tahoe 4WD | 2015-2017 | All | All | All | All | |
| GMC | Sierra 4WD | 2014-2017 | All | All | All | All | |
| GMC | Sierra 1500 4WD | 2014 | All | All | All | All | |
| GMC | Sierra 2500 4WD | 2014 | All | All | All | All | |
| GMC | Sierra 3500 4WD | 2014 | All | All | All | All | |
| GMC | Yukon 4WD | 2015-2017 | All | All | All | All | |
| GMC | Yukon XL 4WD | 2015-2017 | All | All | All | All | |
| Cadillac |
Escalade 4WD | 2015-2017 | All | All | All | All | |
| Cadillac |
Escalade ESV 4WD | 2015-2017 | All | All | All | All | |
Equipped with RPO NQH or NP0
Supersession Statement:
This PI was superseded to provide repair direction. Please discard PIP5261A.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Some customers may comment on a high pitched whine noise from the vehicle noticed when driving in auto 4wd.
The customer may comment that it is an intermittent noise and no noticeable pattern to when it can be heard.
Recommendation/Instructions
The transfer case control module on these vehicles is located next to the accelerator pedal and is not covered by any close out or hush panels.
When the transfer case control module has to move the transfer case actuator motor the higher current passing through the module causes an “electronic buzz or whine” within some of the capacitors in the module that can be heard by some of our customers.
The latest transfer case control module in service parts has provisions to eliminate this noise. Replace transfer case control module with current part number in the catalog. When programming the module ensure that the description for the calibration installed states the following “New software (Version 9.2) to address field issue of setting DTC C0398 while being driven in AUTO mode for 1 hour due to the IPS sensor drifting.”
Warranty Information
For vehicles repaired under warranty use:
| Labor Operation | Description | Labor Time |
| 8420050 | Transfer Case Control Module Replacement | Use published time |
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
SEOCONTENT-END
Bulletin No.: PIP5261A
Date: Feb-2016
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Bulletin No.: PIP5261A
Date: Feb-2016
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Bulletin No.: PIP5261
Date: Jan-2015
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Bulletin No.: PIP5261
Date: Jan-2015
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- Improved performance over previous DEXRON fluids in: friction durability, viscosity stability, aeration and foam control, and oxidation resistance
- Potential to enable improved fuel economy and longer transmission life
- Provides for extended drain intervals
- Backward compatible with previous Dexron automatic transmission fluids and can be used as a much-improved replacement for older vehicles/transmissions originally using previous Dexron fluids
- Improved performance over previous Dexron fluids in: friction durability, viscosity stability, aeration and foam control, and oxidation resistance
- Potential to enable improved fuel economy and longer transmission life
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