TSB - No Audio Out of Speakers At Times

[Klaus]

Document ID # 1252286
2003 HUMMER H2

--------------------------------------------------------------------------------

No Audio Out of Speakers At Times (Reprogram Radio and/or Replace Amplifier) #02-08-44-020B - (02/27/2003)
Table 1: Silverado, Tahoe, Suburban, Avalanche, Express, Sierra (except Denali), Yukon (except Denali), Yukon XL (except Denali), Savana (with UB0, UB1 or UC6 Sound Systems without Y91 Option)
Table 2: Yukon Denali, Yukon Denali XL, Sierra Denali, Escalade, Escalade EXT (with UQ7 Premium Sound System with Y91)
Table 3: HUMMER H2 Vehicles (with UQ7 Premium Sound System)
No Audio Out of Speakers At Times (Reprogram Radio and/or Replace Amplifier)
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).
Silverado, Tahoe, Suburban, Avalanche, Express, Sierra (except Denali), Yukon (except Denali), Yukon XL (except Denali), Savana (with UB0, UB1 or UC6 Sound Systems without Y91 Option) 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.


Yukon Denali, Yukon Denali XL, Sierra Denali, Escalade, Escalade EXT (with UQ7 Premium Sound System with Y91) 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.


HUMMER H2 Vehicles (with UQ7 Premium Sound System) 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.




GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

© Copyright General Motors Corporation. All Rights Reserved.


--------------------------------------------------------------------------------
Document ID # 1252286
2003 HUMMER H2

[Klaus]

Document ID # 1252286
2003 HUMMER H2

--------------------------------------------------------------------------------

No Audio Out of Speakers At Times (Reprogram Radio and/or Replace Amplifier) #02-08-44-020B - (02/27/2003)
Table 1: Silverado, Tahoe, Suburban, Avalanche, Express, Sierra (except Denali), Yukon (except Denali), Yukon XL (except Denali), Savana (with UB0, UB1 or UC6 Sound Systems without Y91 Option)
Table 2: Yukon Denali, Yukon Denali XL, Sierra Denali, Escalade, Escalade EXT (with UQ7 Premium Sound System with Y91)
Table 3: HUMMER H2 Vehicles (with UQ7 Premium Sound System)
No Audio Out of Speakers At Times (Reprogram Radio and/or Replace Amplifier)
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).
Silverado, Tahoe, Suburban, Avalanche, Express, Sierra (except Denali), Yukon (except Denali), Yukon XL (except Denali), Savana (with UB0, UB1 or UC6 Sound Systems without Y91 Option) 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.


Yukon Denali, Yukon Denali XL, Sierra Denali, Escalade, Escalade EXT (with UQ7 Premium Sound System with Y91) 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.


HUMMER H2 Vehicles (with UQ7 Premium Sound System) 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.




GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

© Copyright General Motors Corporation. All Rights Reserved.


--------------------------------------------------------------------------------
Document ID # 1252286
2003 HUMMER H2