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NHTSA ID Number: 10126957
Manufacturer Communication Number: PIP5245B
Summary
This Preliminary Information communication provides information to the technician on how to diagnose vehicles with various noises associated with four wheel drive operation. Before beginning any diagnosis it is imperative to review the Symptoms – Transfer Case in Service Information and perform the necessary inspections. In all cases the complaint vehicle should be compared to another like vehicle before beginning any repairs.
16 Affected Products
Vehicles
| CHEVROLET | SILVERADO 2500 | 2015-2018 |
| CHEVROLET | SILVERADO 3500 | 2015-2018 |
| GMC | SIERRA 2500 | 2015-2018 |
| GMC | SIERRA 3500 | 2015-2018 |
SEOCONTENT-START
Bulletin No.: PIP5245B
Published date: 12/11/2017
PIP5245B Whine Noise Operating In 4wd
Models
| Brand: | Model: | Model Years: | VIN: | Engine: | Transmissions: | |
|---|---|---|---|---|---|---|
| from | to | |||||
| Chevrolet | Silverado 2500/3500 | 2015 – 2018 | All *See Note | All *See Note | All | All |
| GMC | Sierra 2500/3500 | 2015 – 2018 | All *See Note | All *See Note | All | All |
*Equipped with 4WD
Supersession Statement
This PI was superseded to update Model Years. Please discard PIP5245A
Condition / Concern
Some customers may comment on various noises associated with 4wd operation.
Recommendations / Instructions
One of the many advantages of the new 2015 MY pick-ups is the cabin is quieter compared to previous model years. For that reason, when the vehicle is in 4WD mode (HI or Low), there may be some noticeable sound from the transfer case. This sound may be described as a whining. This sound can be described as being a very broad band frequency.
With the vehicle in 4WD mode, this sound will be present on both acceleration (30-40 mph) and deceleration. The sound will increase when driving on dry pavement in 4WD. It can also be identified since it disappears or reduces considerably in 2WD mode.
Before beginning any diagnosis it is imperative to review the Symptoms – Transfer Case in SI and perform the necessary inspections.
In all cases the complaint vehicle should be compared to another like vehicle before beginning any repairs.
This information applies to 2015 through 2018 model year vehicles listed above.
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.: PIP5245B
Published date: 12/11/2017
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Bulletin No.: PIP5245A
Date: Feb-2016
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Bulletin No.: PIP5245A
Date: Feb-2016
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Bulletin No.: PIP5245
Date: Nov-2014
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Bulletin No.: PIP5245
Date: November, 2014
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