NHTSA ID Number: 10126342
Manufacturer Communication Number: 15-08-44-003
Summary
This technical bulletin provides repair information to correct a customer concern of a loud drone or growl noise heard from inside the vehicle.
2 Affected Products
Vehicle
BUICK | ENCORE | 2014-2015 |
Parts Information
| AMPLIFIER ASM-RDO SPKR | 42444544 |
| AMPLIFIER ASM-RDO SPKR | 42338477
GM Genuine Parts 42338477 Radio Speaker Amplifier
Last update on 2026-07-02 / Affiliate links / Images from Amazon Product Advertising API |
SEOCONTENT-START
#15-08-44-003: Loud Drone or Growl Noise Heard from Inside Vehicle – (Oct 1, 2015)
| Subject: | Loud Drone or Growl Noise Heard from Inside Vehicle |
| Models: | 2014-2015 Buick Encore |
| Equipped with NKC and UQA, or UQG |
Condition
Some customers may comment on a loud drone or growl noise heard from inside the vehicle. The sound may be more predominant during the following scenarios:
- A larger, taller seat occupant in the passenger seat. For example, 300+lb occupant at about 5’10” (178 cm) tall
- A passenger seat occupant with a large bag on lap.
- Passenger compartment is full.
- Rear cargo area is loaded near the sub-woofers location.
Cause
This may be caused by the noise cancelling microphones not functioning as intended.
Replace the amplifier. Refer to Radio Speaker Amplifier Replacement in SI.
Correction
If you encounter a vehicle with the above concern, follow the procedure below.
- Move the passenger seat to the furthest forward position.
- If available, have a taller seat occupant with a bag or backpack in lap sit in the seat.
Note: In this position, the occupants knees will be pressed hard to the glove box.
- With seat occupied, attempt to duplicate the customers concern.
- If duplicated, replace the amplifier. Refer to Radio Speaker Amplifier Replacement in SI.
After the amplifier is replaced, verify the customer’s concern is corrected. If the concern is still present, check connections to the front door speakers, rear door speakers and the sub-woofer for correct polarity.
Parts Information
| RPO | Part Number | Description |
| UQA | 42444544 | AMPLIFIER ASM-RDO SPKR |
| UQG | 42338477
GM Genuine Parts 42338477 Radio Speaker Amplifier
Last update on 2026-07-02 / Affiliate links / Images from Amazon Product Advertising API |
AMPLIFIER ASM-RDO SPKR |
Warranty Information
For vehicles repaired under warranty, use:
| Labor Operation | Description | Labor Time |
| 3421200 | Radio Speaker Amplifier Replacement | Use Published Labor Operation Time |
SEOCONTENT-END
Bulletin No.: 15-08-44-003
Date: Oct-2015
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Last update on 2026-07-01 / Affiliate links / Images from Amazon Product Advertising API
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