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Document ID# 1351972
2003 HUMMER
H2
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<H1>Driveline Clunk When Stopping (Reprogram Powertrain Control Module (PCM))
#03-07-30-028 - (06/27/2003)</H1>Driveline Clunk When Stopping (Reprogram
Powertrain Control Module (PCM))
2003 Cadillac Escalade, Escalade ESV, Escalade EXT</P>
2003 GMC Yukon Denali, Yukon Denali XL</P>
2003 HUMMER H2</P>
with 6.0L Engine (VINs N, U -- RPOs LQ9, LQ4) and 4L65E Automatic
Transmission (RPO M32) and AWD Transfer Case (RPO NR3)</P>
or</P>
2003 Chevrolet Suburban, Tahoe</P>
2003 GMC Yukon, Yukon XL</P>
with Stabilitrak System (RPO JL4) and 4WD Transfer Case (RPO NR4)</P><A
name=ss1-1351972><A
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<H5>Condition</A></H5>
Some customers may comment on a clunk noise when stopping. This noise may
occur on a 3-2 downshift at approximately 24km/h (15mph) and may be
more noticeable on quicker stops.</P><A name=ss2-1351972><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1351972&psdid=293&evc= sm#ss2-1351972">
<H5>Cause</A></H5>
This condition may be caused by lash in the driveline.</P><A
name=ss3-1351972><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1351972&psdid=293&evc= sm#ss3-1351972">
<H5>Correction</A></H5>
A revised calibration has been released that will eliminate the 3-2 downshift
and create a 3-1 downshift instead. Reprogram the PCM using the new service
calibration, which was available from Techline starting June 2, 2003 on the
TIS2000 version 6.0 or later. This calibration is an electronic calibration and
is not available from GMSPO.</P><A name=ss4-1351972><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1351972&psdid=293&evc= sm#ss4-1351972">
<H5>Warranty Information</A></H5>
For vehicles repaired under warranty, use:</P>
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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>
K5364</P></TD>
<TD vAlign=center align=middle>
Transmission Control Module (TCM) - Reprogram</P></TD>
<TD vAlign=center align=middle>
0.4hr</P></TD></TR>
<TR>
<TD vAlign=center align=middle>
Add</P></TD>
<TD vAlign=center align=middle>
To Diagnosis</P></TD>
<TD vAlign=center align=middle>
0.0 -- 0.3hr</P></TD></TR></TBODY></TABLE>
</P>
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<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>
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<TD align=middle width=167><FONT size=2>WE SUPPORT VOLUNTARY TECHNICIAN
CERTIFICATION
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Document ID# 1351972
2003 HUMMER
H2
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03-07-2004, 08:39 PM
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