Odd Radio Problem

bigdogs · July 4, 2005

I have a 2003 Sierra 2500HD with the Bose in dash 6 CD changer with Onstar, steering wheel controls but no XM (atleast yet). So far I have had this problem 2X and the dealer could not find any error codes when he scanned it. The problem is that the radio appeared to be working, showing station info or track depending on the mode but it was not playing any sound at all. I could switch bands or even hit the Onstar button and again not sound at all. Both happened from a fresh start up, once after sitting all night another another time sitting for just like 10-15 mins when at the store, and both seemed to fix themselves sometime later. Just shutting it off and immediately restarting didn't fix it but starting it later (alteast 15mins in one case and 4 hrs later in the other) had the radio working again.

Any ideas???

Thanks

Wingnut · July 4, 2005

You have to feed the secondary hamsters (usually found in the dash, vice under the hood) in order for the peripheral electronic systems to work.

bigdogs · July 4, 2005

You have to feed the secondary hamsters (usually found in the dash, vice under the hood) in order for the peripheral electronic systems to work.

<{POST_SNAPBACK}>

Frank S · July 4, 2005

I have a 2003 Sierra 2500HD with the Bose in dash 6 CD changer with Onstar, steering wheel controls but no XM (atleast yet). So far I have had this problem 2X and the dealer could not find any error codes when he scanned it. The problem is that the radio appeared to be working, showing station info or track depending on the mode but it was not playing any sound at all. I could switch bands or even hit the Onstar button and again not sound at all. Both happened from a fresh start up, once after sitting all night another another time sitting for just like 10-15 mins when at the store, and both seemed to fix themselves sometime later. Just shutting it off and immediately restarting didn't fix it but starting it later (alteast 15mins in one case and 4 hrs later in the other) had the radio working again.

Any ideas???

Thanks

<{POST_SNAPBACK}>

No clue what so ever but if it makes you feel any better, the exact same thing happened to my 6 day old work truck last week.

I fixed it by turning the truck off and turning it back on.

GM-Tech · July 4, 2005

No Audio Out of Speakers At Times (Reprogram Radio and/or Replace Amplifier) #02-08-44-020B - (Feb 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)

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

bigdogs · July 5, 2005

Wow GM-Tech, thanks for the reply with the TSB in it. When I took it in to my dealer, they scanned it with a Tech2 and found no codes so didn't really do anything more. Is there something else they can do to check it being the radio was working when they tested it? Unfortunately both times it didn't work they were closed. I have noticed that it doesn't seem as loud either, but thought maybe it was my imagination until these 2 times it didn't work at all.

bigdogs · July 5, 2005

No clue what so ever but if it makes you feel any better, the exact same thing happened to my 6 day old work truck last week.

I fixed it by turning the truck off and turning it back on.

<{POST_SNAPBACK}>

Mine came back after restarting too but not right away, IOW just turning off the key and immediately restarting, it seemed to have to sit awhile before it worked again. I guess that GMPP may pay off

USA1Fan · July 5, 2005

My (early build) 2004 has done this once. I pulled over in a parking lot, turned the ignition off, then restarted the truck and everything was fine again. So I guess maybe some early 2004 vehicles inherited this same issue.

Anyway, other than the one time mine's been fine.

Good luck with yours bigdogs.

GM-Tech · July 5, 2005

Is there something else they can do to check it being the radio was working when they tested it?

If it's working when you bring it to them, there is no test they can do, but they should just go ahead and reprogram it since it's a known issue.

July 5, 2005

My early '04 has done this several times too, I've had the reprogram done already. Amp is ordered.

bigdogs · July 6, 2005

Thanks for all the info on this problem. I have printed out the TSB and will go back the dealer and see if they will reprogram it (Does that just consist of hooking it up to a Tech2 for a few minutes or ???) and see if that does the trick. I guess atleast they can document it and then if need be order the new amp.