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Document ID# 1252286
2003 HUMMER
H2 </TD>
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<H1>No Audio Out of Speakers At Times (Reprogram Radio and/or Replace Amplifier)
#02-08-44-020B - (02/27/2003)</H1>
<TABLE>
<TBODY>
<TR>
<TD>
Table 1:</TD>
<TD><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1252286&psdid=293&evc= sm#tab4-1252286">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)</A></TD></TR>
<TR>
<TD>
Table 2:</TD>
<TD><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1252286&psdid=293&evc= sm#tab5-1252286">Yukon
Denali, Yukon Denali XL, Sierra Denali, Escalade, Escalade EXT (with UQ7
Premium Sound System with Y91)</A></TD></TR>
<TR>
<TD>
Table 3:</TD>
<TD><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1252286&psdid=293&evc= sm#tab6-1252286">HUMMER
H2 Vehicles (with UQ7 Premium Sound System)</A></TD></TR></TBODY></TABLE>No
Audio Out of Speakers At Times (Reprogram Radio and/or Replace Amplifier)
2003 Cadillac Escalade, Escalade EXT</P>
2003 Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe</P>
2003 GMC Savana, Sierra, Sierra Denali, Yukon, Yukon Denali, Yukon XL, Yukon
Denali XL</P>
2003 HUMMER H2</P>
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).</P><A name=ss1-1252286><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1252286&psdid=293&evc= sm#ss1-1252286">
<H5>Condition</A></H5>
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.</P><A name=ss2-1252286><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1252286&psdid=293&evc= sm#ss2-1252286">
<H5>Cause</A></H5>
An anomaly within the amplifier/radio operating systems may cause this
condition.</P><A name=ss3-1252286><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1252286&psdid=293&evc= sm#ss3-1252286">
<H5>Correction</A></H5>
<FONT color=brown>
<H4>Important</H4>
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.</P></FONT>
</P>
- <LI type=1>Determine the regular production option (RPO) code of the sound
system in the vehicle from the SPID label.
<LI type=1>Install the Tech2® to the vehicle DLC and determine the part
number of the radio software and the amplifier part number.
<LI type=1>Refer to the tables below to determine the correct repair(s).
</LI>
<TABLE width="100%" border=1><A name=tab4-1252286><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1252286&psdid=293&evc= sm#tab4-1252286">
<H4><FONT color=#254164>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)</FONT></H4></A>
<TBODY>
<TR>
<TH align=middle>
If Radio Operational software is </P></TH>
<TH align=middle>
Radio re-programming required?</P></TH></TR>
<TR>
<TD vAlign=center align=middle>
15184928, or 15184929</P></TD>
<TD vAlign=center align=middle>
YES</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
15100936, or 15100937</P></TD>
<TD vAlign=center align=middle>
NO</P></TD></TR></TBODY></TABLE>
<FONT color=blue>
<H4>Notice</H4>
BEFORE DISCONNECTING ANY AUDIO SYSTEM COMPONENT IN A VEHICLE WITH THE BOSE®
AUDIO SYSTEM, THE 30AMP AMPLIFIER FUSE MUST BE REMOVED FROM THE ENGINE
WIRING HARNESS JUNCTION BLOCK. Failure to remove the 30AMP fuse from the
UBEC can result in a damaged Bose® amplifier.</P></FONT>
</P>
<FONT color=brown>
<H4>Important</H4>
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.</P></FONT>
</P>
<TABLE width="100%" border=1><A name=tab5-1252286><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1252286&psdid=293&evc= sm#tab5-1252286">
<H4><FONT color=#254164>Yukon Denali, Yukon Denali XL, Sierra Denali,
Escalade, Escalade EXT (with UQ7 Premium Sound System with
Y91)</FONT></H4></A>
<TBODY>
<TR>
<TH vAlign=bottom align=middle>
If Radio Operational software is </P></TH>
<TH vAlign=bottom align=middle>
Radio Re-programming required?</P></TH>
<TH vAlign=bottom align=middle>
If Amplifier part number is</P></TH>
<TH align=middle>
Install new Amplifier Part Number</P></TH></TR>
<TR>
<TD vAlign=center align=middle>
15184928, or 15184929,</P></TD>
<TD vAlign=center align=middle>
YES</P></TD>
<TD vAlign=center align=middle>
--</P></TD>
<TD vAlign=center align=middle>
--</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
15100936, or 15100937..</P></TD>
<TD vAlign=center align=middle>
No</P></TD>
<TD vAlign=center align=middle>
--</P></TD>
<TD vAlign=center align=middle>
--</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
--</P></TD>
<TD vAlign=center align=middle>
--</P></TD>
<TD vAlign=center align=middle>
15054675 or 15188461</P></TD>
<TD vAlign=center align=middle>
15191601</P></TD></TR></TBODY></TABLE>
<FONT color=blue>
<H4>Notice</H4>
BEFORE DISCONNECTING ANY AUDIO SYSTEM COMPONENT IN A VEHICLE WITH THE BOSE®
AUDIO SYSTEM, THE 30AMP AMPLIFIER FUSE MUST BE REMOVED FROM THE ENGINE
WIRING HARNESS JUNCTION BLOCK. Failure to remove the 30AMP fuse from the
UBEC can result in a damaged Bose® amplifier.</P></FONT>
</P>
<FONT color=brown>
<H4>Important</H4>
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.</P></FONT>
</P>
<TABLE width="100%" border=1><A name=tab6-1252286><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1252286&psdid=293&evc= sm#tab6-1252286">
<H4><FONT color=#254164>HUMMER H2 Vehicles (with UQ7 Premium Sound
System)</FONT></H4></A>
<TBODY>
<TR>
<TH align=middle>
If Radio Operational software is </P></TH>
<TH align=middle>
Radio re-programing required?</P></TH>
<TH align=middle>
If Amplifier part number is</P></TH>
<TH align=middle>
Install new Amplifier Part Number</P></TH></TR>
<TR>
<TD vAlign=center align=middle>
15064068, or 15064070</P></TD>
<TD vAlign=center align=middle>
YES</P></TD>
<TD vAlign=center align=middle>
--</P></TD>
<TD vAlign=center align=middle>
--</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
15100936, or 15100937</P></TD>
<TD vAlign=center align=middle>
NO</P></TD>
<TD vAlign=center align=middle>
--</P></TD>
<TD vAlign=center align=middle>
--</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
--</P></TD>
<TD vAlign=center align=middle>
--</P></TD>
<TD vAlign=center align=middle>
15177435</P></TD>
<TD vAlign=center align=middle>
15188044</P></TD></TR></TBODY></TABLE><A name=ss7-1252286><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1252286&psdid=293&evc= sm#ss7-1252286">
<H5>Parts Information</A></H5>
<TABLE width="100%" border=1>
<TBODY>
<TR>
<TH vAlign=bottom align=middle>
Part Number</P></TH>
<TH vAlign=bottom align=middle>
Description</P></TH>
<TH vAlign=bottom align=middle>
Qty</P></TH></TR>
<TR>
<TD vAlign=center align=middle>
15191601</P></TD>
<TD vAlign=center align=middle>
Amplifier </P>
(All except HUMMER H2)</P></TD>
<TD vAlign=center align=middle>
*</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
15188044</P></TD>
<TD vAlign=center align=middle>
Amplifier </P>
(HUMMER H2 only)</P></TD>
<TD vAlign=center align=middle>
*</P></TD></TR></TBODY></TABLE>
*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.</P><A name=ss8-1252286><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1252286&psdid=293&evc= sm#ss8-1252286">
<H5>Reprogramming Software</A></H5>
The software necessary to reprogram the radio was released on TIS version
1.5, of January 2003.</P><A name=ss9-1252286><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1252286&psdid=293&evc= sm#ss9-1252286">
<H5>Warranty Information</A></H5>
For vehicles repaired under warranty, use:</P>
<TABLE width="100%" border=1>
<TBODY>
<TR>
<TH vAlign=bottom align=middle>
Labor Operation</P></TH>
<TH vAlign=bottom align=middle>
Description</P></TH>
<TH vAlign=bottom align=middle>
Labor Time</P></TH></TR>
<TR>
<TD vAlign=center align=middle>
N4199</P></TD>
<TD vAlign=center align=middle>
Module, Instrument Panel Cluster (IPC) - Reprogram</P></TD>
<TD vAlign=center align=middle>
0.4hr</P></TD></TR>
<TR>
<TD vAlign=center colSpan=3>
If the amplifier was replaced, use the published labor operation time
for the vehicle repaired.</P></TD></TR></TBODY></TABLE>
</P>
<TABLE width="100%">
<TBODY>
<TR>
<TD align=left width=778><FONT size=1>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.
</FONT></TD>
<TD align=middle width=42></TD>
<TD align=middle width=167><FONT size=2>WE SUPPORT VOLUNTARY TECHNICIAN
CERTIFICATION
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© Copyright General Motors Corporation. All Rights
Reserved. </P>
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Document ID# 1252286
2003 HUMMER
H2 </TD>
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