<HTML>
<HEAD><TITLE>Service Information</TITLE></HEAD>
<BODY BGCOLOR="#FFFFFF">
<form name='topNavForm' action='/servlets/CellHandler'>
<table width='100%' align='CENTER'>
<tr>
<td width='25%' slign='LEFT'>
<input type='BUTTON' name='back' value='<- Back' onclick='java_script: history.back[);'><input type='BUTTON' name='forward' value='Forward ->' onclick='JavaScript: history.forward();'>
</td>
<td width='50%' align='CENTER'>
Document ID# 1252286
2003 HUMMER H2
</td>
<td width='25%' align='RIGHT'>
<input type='BUTTON' name='print' value='Print' onclick='java_script: window.print[);'>
</td>
</tr>
</table>
<HR>
</FORM>
<H1>No Audio Out of Speakers At Times (Reprogram Radio and/or Replace Amplifier) #02-08-44-020B - (02/27/2003)</H1>
<table><tr><td>Table 1:</td><td><A HREF="#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="#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> HUMMER H2 Vehicles (with UQ7 Premium Sound System) (#tab6-1252286)</td></tr>
</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="#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="#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="#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>
<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>
<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="#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>
<TR>
<TH ALIGN="center" ROWSPAN=1>
If Radio Operational software is </P>
</TH><TH ALIGN="center" ROWSPAN=1>
Radio re-programming required?</P>
</TH></TR>
<TR>
<TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
15184928, or 15184929</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
YES</P>
</TD></TR>
<TR>
<TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
15100936, or 15100937</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
NO</P>
</TD></TR>
</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="#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>
<TR>
<TH ALIGN="center" VALIGN="bottom" ROWSPAN=1>
If Radio Operational software is </P>
</TH><TH ALIGN="center" VALIGN="bottom" ROWSPAN=1>
Radio Re-programming required?</P>
</TH><TH ALIGN="center" VALIGN="bottom" ROWSPAN=1>
If Amplifier part number is</P>
</TH><TH ALIGN="center" ROWSPAN=1>
Install new Amplifier Part Number</P>
</TH></TR>
<TR>
<TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
15184928, or 15184929,</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
YES</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
--</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
--</P>
</TD></TR>
<TR>
<TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
15100936, or 15100937..</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
No</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
--</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
--</P>
</TD></TR>
<TR>
<TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
--</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
--</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
15054675 or 15188461</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
15191601</P>
</TD></TR>
</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="#tab6-1252286">
<H4><FONT COLOR="#254164">HUMMER H2 Vehicles (with UQ7 Premium Sound System)</FONT></H4></A>
<TR>
<TH ALIGN="center" ROWSPAN=1>
If Radio Operational software is </P>
</TH><TH ALIGN="center" ROWSPAN=1>
Radio re-programing required?</P>
</TH><TH ALIGN="center" ROWSPAN=1>
If Amplifier part number is</P>
</TH><TH ALIGN="center" ROWSPAN=1>
Install new Amplifier Part Number</P>
</TH></TR>
<TR>
<TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
15064068, or 15064070</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
YES</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
--</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
--</P>
</TD></TR>
<TR>
<TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
15100936, or 15100937</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
NO</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
--</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
--</P>
</TD></TR>
<TR>
<TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
--</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
--</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
15177435</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
15188044</P>
</TD></TR>
</TABLE>
<A NAME="ss7-1252286">
<A HREF="#ss7-1252286">
<H5>Parts Information</A></H5><TABLE WIDTH="100%" BORDER=1>
<TR>
<TH ALIGN="center" VALIGN="bottom" ROWSPAN=1>
Part Number</P>
</TH><TH ALIGN="center" VALIGN="bottom" ROWSPAN=1>
Description</P>
</TH><TH ALIGN="center" VALIGN="bottom" ROWSPAN=1>
Qty</P>
</TH></TR>
<TR>
<TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
15191601</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
Amplifier </P>
(All except HUMMER H2)</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
*</P>
</TD></TR>
<TR>
<TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
15188044</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
Amplifier </P>
(HUMMER H2 only)</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
*</P>
</TD></TR>
</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="#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="#ss9-1252286">
<H5>Warranty Information</A></H5>
For vehicles repaired under warranty, use:</P>
<TABLE WIDTH="100%" BORDER=1>
<TR>
<TH ALIGN="center" VALIGN="bottom" ROWSPAN=1>
Labor Operation</P>
</TH><TH ALIGN="center" VALIGN="bottom" ROWSPAN=1>
Description</P>
</TH><TH ALIGN="center" VALIGN="bottom" ROWSPAN=1>
Labor Time</P>
</TH></TR>
<TR>
<TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
N4199</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
Module, Instrument Panel Cluster (IPC) - Reprogram</P>
</TD><TD ALIGN="center" VALIGN="middle" ROWSPAN=1>
0.4hr</P>
</TD></TR>
<TR>
<TD VALIGN="middle" ROWSPAN=1 COLSPAN=3>
If the amplifier was replaced, use the published labor operation time for the
vehicle repaired.</P>
</TD></TR>
</TABLE>
</p>
<table width='100%'>
<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='CENTER' width='42'>
/servlets/TifToGif?pic=999999994
</td>
<td align='CENTER' width='167'>
<font size='2'>
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
</font>
</td>
</tr>
</table>
<P ALIGN='CENTER'>
© Copyright General Motors Corporation.
All Rights Reserved.
</P>
<form name='bottomNavForm'>
<hr>
<table width='100%' align='CENTER'>
<tr>
<td width='25%' slign='LEFT'>
<input type='BUTTON' name='back' value='<- Back' onclick='java_script: history.back[);'><input type='BUTTON' name='forward' value='Forward ->' onclick='JavaScript: history.forward();'>
</td>
<td width='50%' align='CENTER'>
Document ID# 1252286
2003 HUMMER H2
</td>
<td width='25%' align='RIGHT'>
<input type='BUTTON' name='print' value='Print' onclick='java_script: window.print[);'>
</td>
</tr>
</table>
</form>
</BODY></HTML>