GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra - 4WD 🢒 Bulletins 🢒 No Audio/No Sound Heard from Radio Speakers, Turn Signals, Hazard Signals and No Warning Chimes When a Door or Liftgate is Opened (Inspect/Seat C2 Audio Amplifier Connector)

No Audio/No Sound Heard from Radio Speakers, Turn Signals, Hazard Signals and No Warning Chimes When a Door or Liftgate is Opened (Inspect/Seat C2 Audio Amplifier Connector)

Subject:No Audio/No Sound Heard from Radio Speakers, Turn Signals, Hazard Signals and No Warning Chimes When a Door or Liftgate is Opened (Inspect/Seat C2 Audio Amplifier Connector)

Models: 2007 Cadillac Escalade, Escalade ESV, Escalade EXT
2007 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2007 GMC Sierra, Yukon, Yukon XL, Yukon Denali, Yukon Denali XL
with Speakers, Premium Audio w/Amplifier or Rear Stereo Audio (RPOs UQA, UQS or UK6)


Condition

Some customers may comment on one or all of the following conditions related to no audio/no sound:

    • No sound from one or more of the radio speakers.
    • No blinking sound heard form the turn signals or hazard signals when on.
    • No audio warning chimes heard when a door or liftgate is opened.

Cause

The C2 Audio Amplifier Connector may become unseated at the amplifier.

Correction

Inspect/Seat the C2 Audio Amplifier Connector (16-way, Black Connector).

  1. Remove the radio, amplifier, and SIR fuses located in the Underhood Bussed Electrical Center (BEC).
  2. Gain access to the radio speaker amplifier. Refer to Radio Speaker Amplifier Replacement in SI.

    3. Object Number: 1957261 Size: SH

    Object Number: 1957263 Size: SH
  3. Visually inspect and pull on the C2 Audio Amplifier Connector (1).
  4. If the connector is properly seated, then refer to SI for further diagnosis based on the customers condition.
  5. If the connector is loose, then reinstall the C2 Audio Amplifier Connector.

    6. Important: Verify the connector is seated and locked into place.

  6. Install the fuses.
  7. Verify the condition has been fixed and clear any DTCs.
  8. If securing the connector does not correct the condition, refer to SI for further diagnosis and repair.
  9. Install the radio speaker amplifier assembly and any other components removed to gain access to the amplifier. Refer to Radio Speaker Amplifier Replacement in SI.

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation

Description

Labor Time

R9734*

Connector, C2 Audio Amplifier - Inspect/Seat

0.7 hr

*This labor operation is for bulletin use only. The number will not be published in the Labor Time Guide.