No Audio Out of Speakers At Times (Reprogram Radio and/or Replace Amplifier)
| Subject: | No Audio Out of Speakers At Times (Reprogram Radio and/or Replace Amplifier) |
| Models: | 2003 Cadillac Escalade, Escalade EXT |
| 2003 Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe |
| 2003 GMC Savana, Sierra, Sierra Denali, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL |
| 2003 HUMMER H2 |
This bulletin is being revised to clarify the models and the approved repair procedure. Please discard Corporate Bulletin Number 02-08-44-020A (Section 08 -- Body and Accessories).
Condition
Some customers may comment that at times there is no audio out of any speakers. However, on the next key cycle the audio system may perform properly.
Cause
An anomaly within the amplifier/radio operating systems may cause this condition.
Correction
Important: Pay particular attention to this correction procedure, it is somewhat complicated. The repair varies based on the vehicle sound system. Refer to the Service Parts Identification (SPID) Label of the vehicle being repaired. The type of sound system in the vehicle will determine the repair procedure.
- Determine the regular production option (RPO) code of the sound system in the vehicle from the SPID label.
- Install the Tech 2® to the vehicle DLC and determine the part number of the radio software and the amplifier part number.
- Refer to the tables below to determine the correct repair(s).
If Radio Operational software is | Radio re-programming required? |
|---|---|
15184928, or 15184929 | YES |
15100936, or 15100937 | NO |
Notice: BEFORE DISCONNECTING ANY AUDIO SYSTEM COMPONENT IN A VEHICLE WITH THE BOSE® AUDIO SYSTEM, THE 30 AMP AMPLIFIER FUSE MUST BE REMOVED FROM THE ENGINE WIRING HARNESS JUNCTION BLOCK. Failure to remove the 30 AMP fuse from the UBEC can result in a damaged Bose® amplifier.
Important: DETERMINE THE SOFTWARE NUMBER OF THE RADIO AND THE AMPLIFIER. THE RADIO MAY NEED REPROGRAMMING, OR THE AMPLIFIER MAY NEED REPLACEMENT ONLY. NOT ALL VEHICLES WILL NEED BOTH A RADIO REPROGRAMMING AND AMPLIFIER REPLACEMENT.
If Radio Operational software is | Radio Re-programming required? | If Amplifier part number is | Install new Amplifier Part Number |
|---|---|---|---|
15184928, or 15184929, | YES | -- | -- |
15100936, or 15100937.. | No | -- | -- |
-- | -- | 15054675 or 15188461 | 15191601 |
Notice: BEFORE DISCONNECTING ANY AUDIO SYSTEM COMPONENT IN A VEHICLE WITH THE BOSE® AUDIO SYSTEM, THE 30 AMP AMPLIFIER FUSE MUST BE REMOVED FROM THE ENGINE WIRING HARNESS JUNCTION BLOCK. Failure to remove the 30 AMP fuse from the UBEC can result in a damaged Bose® amplifier.
Important: DETERMINE THE SOFTWARE NUMBER OF THE RADIO AND THE AMPLIFIER. THE RADIO MAY NEED REPROGRAMMING, OR THE AMPLIFIER MAY NEED REPLACEMENT ONLY. NOT ALL VEHICLES WILL NEED BOTH A RADIO REPROGRAMMING AND AMPLIFIER REPLACEMENT.
If Radio Operational software is | Radio re-programing required? | If Amplifier part number is | Install new Amplifier Part Number |
|---|---|---|---|
15064068, or 15064070 | YES | -- | -- |
15100936, or 15100937 | NO | -- | -- |
-- | -- | 15177435 | 15188044 |
Parts Information
Part Number | Description | Qty |
|---|---|---|
15191601 | Amplifier (All except HUMMER H2) | * |
15188044 | Amplifier (HUMMER H2 only) | * |
*Do not order an amplifier for stock. A limited number of units are available at this time. Order the amplifier on an as needed basis for the repair of a specific vehicle.
Reprogramming Software
The software necessary to reprogram the radio was released on TIS version 1.5, of January 2003.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
N4199 | Module, Instrument Panel Cluster (IPC) - Reprogram | 0.4 hr |
If the amplifier was replaced, use the published labor operation time for the vehicle repaired. | ||
