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TSB - DEX-COOL Engine Coolant Information #00-06-02-006A - (02/13/2004)
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#1
03-04-2004, 10:27 PM
Hummer Guru
Join Date: Nov 2002
Location: CSA
Posts: 2,511
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<TD align=middle width="50%">Document ID# 1459491
2003 HUMMER
H2
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<H1>DEX-COOL Engine Coolant Information #00-06-02-006A - (02/13/2004)</H1>
<TABLE>
<TBODY>
<TR>
<TD>Table 1:</TD>
<TD><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#tab5-1459491">Table
1 -- Approved Engine Coolant Recycling Services -- DEX-COOLŽ</A></TD></TR>
<TR>
<TD>Table 2:</TD>
<TD><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#tab6-1459491">Table
2 -- Approved Engine Coolant Recycling Services and Equipment -
Conventional Green</A></TD></TR></TBODY></TABLE>DEX-COOLŽ Engine Coolant
Information
2004 and Prior Passenger Cars and Trucks</P>
2004 and Prior HUMMER H2</P>
This bulletin is being revised to add model years and updated information.
Please discard Corporate Bulletin Number00-06-02-006 (Section 6 --
Engine/Propulsion System).</P><A name=ss1-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#ss1-1459491">
<H5>Licensed Approved DEX-COOLŽ Providers</A></H5>
<FONT color=brown>
<H4>Important</H4>
USE OF NON APPROVED VIRGIN OR RECYCLED DEX-COOLŽ OR DEVIATIONS IN THE FORM OF
ALTERNATE CHEMICALS OR ALTERATION OF EQUIPMENT, WILL VOID THE GM ENDORSEMENT,
MAY DEGRADE COOLANT SYSTEM INTEGRITY, AND PLACE THE COOLING SYSTEM WARRANTY
UNDER JEOPARDY.</P></FONT>
</P>
Following are the only current licensed and approved providers of virgin
DEX-COOLŽ and DEX-COOLŽ inhibitor packages used for recycling. Products that are
advertised as "COMPATIBLE" or "RECOMMENDED" for use with DEX-COOLŽ have not been
tested or approved by General Motors. Non approved coolants may degrade the
coolant system integrity and will no longer be considered a 5yr/150,000 mile
(240,000 km) coolant.</P>
Approved providers of DEX-COOLŽ meeting General Motors GM6277M specifications
are as follows: </P>
<UL type=BULLET>
<LI>GM Vehicle Care
<LI>AC Delco
<LI>ChevronTexaco
<LI>Shell
<LI>Prestone
<LI>Recycled Fluid Technologies (Bulk Service) </LI>[/list]<A name=ss2-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#ss2-1459491">
<H5>Coolant Removal Services/Recycling</A></H5>
The following tables include all coolant recycling processes currently
approved by GM. Also included is a primary phone number and demographic
information. Used DEX-COOLŽ can be combined with used conventional coolant
(green) for recycling. Depending on the recycling service and/or equipment, it
is then designated as a conventional (2yr/30,000 mile (50,000 km) coolant or
DEX-COOLŽ 5yr/150,000 mile (240,000 km) coolant. Recycled coolants as designated
in this bulletin may be used during the vehicle(s) warranty period.</P><A
name=ss3-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#ss3-1459491">
<H5>DEX-COOLŽ Recycling </A></H5>
The DEX-COOLŽ recycling service listed in Table 1 has been approved for
recycling waste engine coolants (DEX-COOLŽ or conventional) to DEX-COOLŽ with
5yr/150,000 (240,000 km) mile usability. Recycling Fluid Technologies is the
only licensed provider of Recycled DEX-COOLŽ meeting GM6277M specifications and
utilizes GM approved inhibitor packages. This is currently a limited program
being monitored by GM Service Operations which will be expanded as demand
increases. </P><A name=ss4-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#ss4-1459491">
<H5>Conventional (Green) Recycling</A></H5>
Processes listed in the Table 2 are capable of recycling waste engine
coolants (DEX-COOLŽ or conventional) to a conventional (green) coolant.
Recycling conventional coolant can be accomplished at your facility by a
technician using approved EQUIPMENT (listed by model number in Table 2), or by
an approved coolant recycling SERVICE which may recycle the coolant at your
facility or at an offsite operation. Refer to the table below for GM approved
coolant recyclers in either of these two categories. Should you decide to
recycle the coolant yourself, strict adherence to the operating procedures is
imperative. Use ONLY the inhibitor chemicals supplied by the respective
(GM approved) recycling equipment manufacturer.</P>
<TABLE width="100%" border=1><A name=tab5-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#tab5-1459491">
<H4><FONT color=#254164>Table 1 -- Approved Engine Coolant Recycling Services
-- DEX-COOLŽ</FONT></H4></A>
<TBODY>
<TR>
<TH vAlign=bottom align=middle>
Recycler</P></TH>
<TH vAlign=bottom align=middle>
Equipment/Service</P></TH>
<TH align=middle>
Recycled Products</P></TH>
<TH vAlign=bottom align=middle>
Demographics</P></TH>
<TH vAlign=bottom align=middle>
Contact</P></TH></TR>
<TR>
<TD vAlign=center align=left>
Recycling Fluid Technologies</P></TD>
<TD vAlign=center align=middle>
Service</P></TD>
<TD vAlign=center align=middle>
DEX-COOLŽ Licensed Provider (50/50 pre-mix)</P></TD>
<TD vAlign=center align=middle>
IN, IL, MI, OH</P></TD>
<TD vAlign=center align=middle>
800-474-4947</P></TD></TR></TBODY></TABLE>
<TABLE width="100%" border=1><A name=tab6-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#tab6-1459491">
<H4><FONT color=#254164>Table 2 -- Approved Engine Coolant Recycling Services
and Equipment - Conventional Green</FONT></H4></A>
<TBODY>
<TR>
<TH vAlign=bottom align=middle>
Recycler</P></TH>
<TH vAlign=bottom align=middle>
Equipment/Service</P></TH>
<TH align=middle>
Recycled Products</P></TH>
<TH vAlign=bottom align=middle>
Demographics</P></TH>
<TH vAlign=bottom align=middle>
Contact</P></TH></TR>
<TR>
<TD vAlign=center align=left>
Antifreeze Technologies Systems</P></TD>
<TD vAlign=center align=middle>
Service</P></TD>
<TD vAlign=center align=middle>
Conventional Green (50/50 pre-mix)</P></TD>
<TD vAlign=center align=middle>
IL, IN, MA, MD, MI, NH, NJ, PA, TX, VA</P></TD>
<TD vAlign=center align=middle>
800-474-4947</P></TD></TR>
<TR>
<TD vAlign=center align=left>
Asbury Environmental Services/Demenno Kerdoon - Trinity Brand</P></TD>
<TD vAlign=center align=middle>
Service</P></TD>
<TD vAlign=center align=middle>
Conventional Green (50/50 pre-mix)</P></TD>
<TD vAlign=center align=middle>
AZ, CA, NV, OR, WA</P></TD>
<TD vAlign=center align=middle>
800-974-4495</P></TD></TR>
<TR>
<TD vAlign=center align=left>
Automotive Environmental Service</P></TD>
<TD vAlign=center align=middle>
Service</P></TD>
<TD vAlign=center align=middle>
Conventional Green (50/50 pre-mix)</P></TD>
<TD vAlign=center align=middle>
AZ, CA, NV, OR, WA</P></TD>
<TD vAlign=center align=middle>
650-325-2666</P></TD></TR>
<TR>
<TD vAlign=center>
Kleentek</P></TD>
<TD vAlign=center align=middle>
AF-250</P></TD>
<TD vAlign=center align=middle>
Conventional Green (50/50 pre-mix)</P></TD>
<TD vAlign=center align=middle>
US, Canada, Mexico</P></TD>
<TD vAlign=center align=middle>
800-435-5336</P></TD></TR>
<TR>
<TD vAlign=center align=left>
Wynn Oil Company</P></TD>
<TD vAlign=center align=middle>
Du-All Bulk 07400</P></TD>
<TD vAlign=center align=middle>
Conventional Green (50/50 pre-mix)</P></TD>
<TD vAlign=center align=middle>
US, Canada, Mexico</P></TD>
<TD vAlign=center align=middle>
800-GMTools</P>
800-989-8363</P></TD></TR>
<TR>
<TD vAlign=center align=left>
Clore Automotive</P></TD>
<TD vAlign=center align=middle>
TechGuard</P></TD>
<TD vAlign=center align=middle>
Conventional Green (50/50 pre-mix)</P></TD>
<TD vAlign=center align=middle>
US, Canada, Mexico</P></TD>
<TD vAlign=center align=middle>
800-328-2921</P></TD></TR></TBODY></TABLE><A name=ss7-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#ss7-1459491">
<H5>Sealing Tablets</A></H5>
Cooling System Sealing Tablets (Seal Tabs) should not be used as a regular
maintenance item after servicing an engine cooling system. Discoloration of
coolant can occur if too many seal tabs have been inserted into the cooling
system. This can occur if seal tabs are repeatedly used over the service life of
a vehicle. Where appropriate, seal tabs may be used if diagnostics fail to
repair a small leak in the cooling system. </P>
When a condition appears in which seal tabs may be beneficial, a specific
bulletin may be released describing their proper usage. After performing
specific procedures outlining seal tab usage, install an appropriate
identification label to indicate that the seal tabs have been installed. If seal
tabs were installed in the cooling system during assembly, the recommended
amount may be added if the cooling system is drained and refilled during a
service event. The recommended number of seal tabs depends on the capacity of
the cooling system. Use between 1 and 1-1/2 grams of seal tabs per liter of
cooling system capacity.</P><A name=ss8-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#ss8-1459491">
<H5>Water Quality</A></H5>
The integrity of the coolant is dependent upon the quality of DEX-COOLŽ and
water. DEX-COOLŽ is a product which has enhanced protection capability as well
as an extended service interval. These enhanced properties may be jeopardized by
combining DEX-COOLŽ with poor quality water. If you suspect the water in your
area of being poor quality, it is recommended you use distilled or de-ionized
water with DEX-COOLŽ.</P><A name=ss9-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#ss9-1459491">
<H5>"Pink" DEX-COOLŽ</A></H5>
DEX-COOLŽ is orange in color to distinguish it from other coolants. Due to
inconsistencies in the mixing of the dyes used with DEX-COOLŽ, some batches may
appear pink after time. The color shift from orange to pink does not affect the
integrity of coolant, and still maintains the 5yr/150,000 mile (240,000 km)
service interval. General Motors is currently pursuing a course of action which
will stabilize the color of DEX-COOLŽ in the field.</P><A name=ss10-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#ss10-1459491">
<H5>Back Service</A></H5>
Only use DEX-COOLŽ if the vehicle was originally equipped with
DEX-COOLŽ.</P><A name=ss11-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#ss11-1459491">
<H5>Contamination</A></H5>
Mixing conventional green coolant with DEX-COOLŽ will degrade the service
interval from 5yrs./150,000 miles to 2yrs./30,000 miles (50,000 km) if left in
the contaminated condition. If contamination occurs, the cooling system must be
flushed twice immediately and re-filled with a 50/50 mixture of DEX-COOLŽ and
clean water in order to preserve the enhanced properties and extended service
interval of DEX-COOLŽ .</P><A name=ss12-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#ss12-1459491">
<H5>After 5years/150,000miles (240,000km)</A></H5>
After 5 yrs/150,000 miles (240,000 km), the coolant should be changed,
preferably using a coolant exchanger. If the vehicle was originally equipped
with DEX-COOLŽ and has not had problems with contamination from non-DEX-COOLŽ
coolants, then the service interval remains the same, and the coolant does not
need to be changed for another 5 yrs/150,000 miles (240,000 km). </P><A
name=ss13-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc=sm#ss13-1459491">
<H5>Equipment (Coolant Exchangers)</A></H5>
The preferred method of performing coolant service is to use a coolant
exchanger. A coolant exchanger can replace virtually all of the old coolant with
new coolant. Coolant exchangers can be used to perform a coolant service without
spillage, and facilitate easy waste collection. They can also be used to lower
the coolant level in a vehicle to allow for less messy servicing of cooling
system components. It is recommended that you use a coolant exchanger with a
vacuum feature that allows easing [lsquo ]burping[rsquo ] (removing trapped air)
of the cooling system. This is a substantial time savings over current methods
of repeatedly thermocycling the vehicle and toping-off the radiator. The vacuum
feature also allows venting of a hot system to relieve system pressure. Approved
coolant exchangers are available through the GMDE (General Motors Dealer
Equipment) program (1-800-GM-TOOLS).</P>
</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
</FONT></TD></TR></TBODY></TABLE>
<P align=center>Š Copyright General Motors Corporation. All Rights
Reserved. </P>
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<TD align=middle width="50%">Document ID# 1459491
2003 HUMMER
H2
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#2
03-04-2004, 10:27 PM
Hummer Guru
Join Date: Nov 2002
Location: CSA
Posts: 2,511
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<TD align=middle width="50%">Document ID# 1459491
2003 HUMMER
H2
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<H1>DEX-COOL Engine Coolant Information #00-06-02-006A - (02/13/2004)</H1>
<TABLE>
<TBODY>
<TR>
<TD>Table 1:</TD>
<TD><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#tab5-1459491">Table
1 -- Approved Engine Coolant Recycling Services -- DEX-COOLŽ</A></TD></TR>
<TR>
<TD>Table 2:</TD>
<TD><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#tab6-1459491">Table
2 -- Approved Engine Coolant Recycling Services and Equipment -
Conventional Green</A></TD></TR></TBODY></TABLE>DEX-COOLŽ Engine Coolant
Information
2004 and Prior Passenger Cars and Trucks</P>
2004 and Prior HUMMER H2</P>
This bulletin is being revised to add model years and updated information.
Please discard Corporate Bulletin Number00-06-02-006 (Section 6 --
Engine/Propulsion System).</P><A name=ss1-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#ss1-1459491">
<H5>Licensed Approved DEX-COOLŽ Providers</A></H5>
<FONT color=brown>
<H4>Important</H4>
USE OF NON APPROVED VIRGIN OR RECYCLED DEX-COOLŽ OR DEVIATIONS IN THE FORM OF
ALTERNATE CHEMICALS OR ALTERATION OF EQUIPMENT, WILL VOID THE GM ENDORSEMENT,
MAY DEGRADE COOLANT SYSTEM INTEGRITY, AND PLACE THE COOLING SYSTEM WARRANTY
UNDER JEOPARDY.</P></FONT>
</P>
Following are the only current licensed and approved providers of virgin
DEX-COOLŽ and DEX-COOLŽ inhibitor packages used for recycling. Products that are
advertised as "COMPATIBLE" or "RECOMMENDED" for use with DEX-COOLŽ have not been
tested or approved by General Motors. Non approved coolants may degrade the
coolant system integrity and will no longer be considered a 5yr/150,000 mile
(240,000 km) coolant.</P>
Approved providers of DEX-COOLŽ meeting General Motors GM6277M specifications
are as follows: </P>
<UL type=BULLET>
<LI>GM Vehicle Care
<LI>AC Delco
<LI>ChevronTexaco
<LI>Shell
<LI>Prestone
<LI>Recycled Fluid Technologies (Bulk Service) </LI>[/list]<A name=ss2-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#ss2-1459491">
<H5>Coolant Removal Services/Recycling</A></H5>
The following tables include all coolant recycling processes currently
approved by GM. Also included is a primary phone number and demographic
information. Used DEX-COOLŽ can be combined with used conventional coolant
(green) for recycling. Depending on the recycling service and/or equipment, it
is then designated as a conventional (2yr/30,000 mile (50,000 km) coolant or
DEX-COOLŽ 5yr/150,000 mile (240,000 km) coolant. Recycled coolants as designated
in this bulletin may be used during the vehicle(s) warranty period.</P><A
name=ss3-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#ss3-1459491">
<H5>DEX-COOLŽ Recycling </A></H5>
The DEX-COOLŽ recycling service listed in Table 1 has been approved for
recycling waste engine coolants (DEX-COOLŽ or conventional) to DEX-COOLŽ with
5yr/150,000 (240,000 km) mile usability. Recycling Fluid Technologies is the
only licensed provider of Recycled DEX-COOLŽ meeting GM6277M specifications and
utilizes GM approved inhibitor packages. This is currently a limited program
being monitored by GM Service Operations which will be expanded as demand
increases. </P><A name=ss4-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#ss4-1459491">
<H5>Conventional (Green) Recycling</A></H5>
Processes listed in the Table 2 are capable of recycling waste engine
coolants (DEX-COOLŽ or conventional) to a conventional (green) coolant.
Recycling conventional coolant can be accomplished at your facility by a
technician using approved EQUIPMENT (listed by model number in Table 2), or by
an approved coolant recycling SERVICE which may recycle the coolant at your
facility or at an offsite operation. Refer to the table below for GM approved
coolant recyclers in either of these two categories. Should you decide to
recycle the coolant yourself, strict adherence to the operating procedures is
imperative. Use ONLY the inhibitor chemicals supplied by the respective
(GM approved) recycling equipment manufacturer.</P>
<TABLE width="100%" border=1><A name=tab5-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#tab5-1459491">
<H4><FONT color=#254164>Table 1 -- Approved Engine Coolant Recycling Services
-- DEX-COOLŽ</FONT></H4></A>
<TBODY>
<TR>
<TH vAlign=bottom align=middle>
Recycler</P></TH>
<TH vAlign=bottom align=middle>
Equipment/Service</P></TH>
<TH align=middle>
Recycled Products</P></TH>
<TH vAlign=bottom align=middle>
Demographics</P></TH>
<TH vAlign=bottom align=middle>
Contact</P></TH></TR>
<TR>
<TD vAlign=center align=left>
Recycling Fluid Technologies</P></TD>
<TD vAlign=center align=middle>
Service</P></TD>
<TD vAlign=center align=middle>
DEX-COOLŽ Licensed Provider (50/50 pre-mix)</P></TD>
<TD vAlign=center align=middle>
IN, IL, MI, OH</P></TD>
<TD vAlign=center align=middle>
800-474-4947</P></TD></TR></TBODY></TABLE>
<TABLE width="100%" border=1><A name=tab6-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#tab6-1459491">
<H4><FONT color=#254164>Table 2 -- Approved Engine Coolant Recycling Services
and Equipment - Conventional Green</FONT></H4></A>
<TBODY>
<TR>
<TH vAlign=bottom align=middle>
Recycler</P></TH>
<TH vAlign=bottom align=middle>
Equipment/Service</P></TH>
<TH align=middle>
Recycled Products</P></TH>
<TH vAlign=bottom align=middle>
Demographics</P></TH>
<TH vAlign=bottom align=middle>
Contact</P></TH></TR>
<TR>
<TD vAlign=center align=left>
Antifreeze Technologies Systems</P></TD>
<TD vAlign=center align=middle>
Service</P></TD>
<TD vAlign=center align=middle>
Conventional Green (50/50 pre-mix)</P></TD>
<TD vAlign=center align=middle>
IL, IN, MA, MD, MI, NH, NJ, PA, TX, VA</P></TD>
<TD vAlign=center align=middle>
800-474-4947</P></TD></TR>
<TR>
<TD vAlign=center align=left>
Asbury Environmental Services/Demenno Kerdoon - Trinity Brand</P></TD>
<TD vAlign=center align=middle>
Service</P></TD>
<TD vAlign=center align=middle>
Conventional Green (50/50 pre-mix)</P></TD>
<TD vAlign=center align=middle>
AZ, CA, NV, OR, WA</P></TD>
<TD vAlign=center align=middle>
800-974-4495</P></TD></TR>
<TR>
<TD vAlign=center align=left>
Automotive Environmental Service</P></TD>
<TD vAlign=center align=middle>
Service</P></TD>
<TD vAlign=center align=middle>
Conventional Green (50/50 pre-mix)</P></TD>
<TD vAlign=center align=middle>
AZ, CA, NV, OR, WA</P></TD>
<TD vAlign=center align=middle>
650-325-2666</P></TD></TR>
<TR>
<TD vAlign=center>
Kleentek</P></TD>
<TD vAlign=center align=middle>
AF-250</P></TD>
<TD vAlign=center align=middle>
Conventional Green (50/50 pre-mix)</P></TD>
<TD vAlign=center align=middle>
US, Canada, Mexico</P></TD>
<TD vAlign=center align=middle>
800-435-5336</P></TD></TR>
<TR>
<TD vAlign=center align=left>
Wynn Oil Company</P></TD>
<TD vAlign=center align=middle>
Du-All Bulk 07400</P></TD>
<TD vAlign=center align=middle>
Conventional Green (50/50 pre-mix)</P></TD>
<TD vAlign=center align=middle>
US, Canada, Mexico</P></TD>
<TD vAlign=center align=middle>
800-GMTools</P>
800-989-8363</P></TD></TR>
<TR>
<TD vAlign=center align=left>
Clore Automotive</P></TD>
<TD vAlign=center align=middle>
TechGuard</P></TD>
<TD vAlign=center align=middle>
Conventional Green (50/50 pre-mix)</P></TD>
<TD vAlign=center align=middle>
US, Canada, Mexico</P></TD>
<TD vAlign=center align=middle>
800-328-2921</P></TD></TR></TBODY></TABLE><A name=ss7-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#ss7-1459491">
<H5>Sealing Tablets</A></H5>
Cooling System Sealing Tablets (Seal Tabs) should not be used as a regular
maintenance item after servicing an engine cooling system. Discoloration of
coolant can occur if too many seal tabs have been inserted into the cooling
system. This can occur if seal tabs are repeatedly used over the service life of
a vehicle. Where appropriate, seal tabs may be used if diagnostics fail to
repair a small leak in the cooling system. </P>
When a condition appears in which seal tabs may be beneficial, a specific
bulletin may be released describing their proper usage. After performing
specific procedures outlining seal tab usage, install an appropriate
identification label to indicate that the seal tabs have been installed. If seal
tabs were installed in the cooling system during assembly, the recommended
amount may be added if the cooling system is drained and refilled during a
service event. The recommended number of seal tabs depends on the capacity of
the cooling system. Use between 1 and 1-1/2 grams of seal tabs per liter of
cooling system capacity.</P><A name=ss8-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#ss8-1459491">
<H5>Water Quality</A></H5>
The integrity of the coolant is dependent upon the quality of DEX-COOLŽ and
water. DEX-COOLŽ is a product which has enhanced protection capability as well
as an extended service interval. These enhanced properties may be jeopardized by
combining DEX-COOLŽ with poor quality water. If you suspect the water in your
area of being poor quality, it is recommended you use distilled or de-ionized
water with DEX-COOLŽ.</P><A name=ss9-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#ss9-1459491">
<H5>"Pink" DEX-COOLŽ</A></H5>
DEX-COOLŽ is orange in color to distinguish it from other coolants. Due to
inconsistencies in the mixing of the dyes used with DEX-COOLŽ, some batches may
appear pink after time. The color shift from orange to pink does not affect the
integrity of coolant, and still maintains the 5yr/150,000 mile (240,000 km)
service interval. General Motors is currently pursuing a course of action which
will stabilize the color of DEX-COOLŽ in the field.</P><A name=ss10-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#ss10-1459491">
<H5>Back Service</A></H5>
Only use DEX-COOLŽ if the vehicle was originally equipped with
DEX-COOLŽ.</P><A name=ss11-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#ss11-1459491">
<H5>Contamination</A></H5>
Mixing conventional green coolant with DEX-COOLŽ will degrade the service
interval from 5yrs./150,000 miles to 2yrs./30,000 miles (50,000 km) if left in
the contaminated condition. If contamination occurs, the cooling system must be
flushed twice immediately and re-filled with a 50/50 mixture of DEX-COOLŽ and
clean water in order to preserve the enhanced properties and extended service
interval of DEX-COOLŽ .</P><A name=ss12-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#ss12-1459491">
<H5>After 5years/150,000miles (240,000km)</A></H5>
After 5 yrs/150,000 miles (240,000 km), the coolant should be changed,
preferably using a coolant exchanger. If the vehicle was originally equipped
with DEX-COOLŽ and has not had problems with contamination from non-DEX-COOLŽ
coolants, then the service interval remains the same, and the coolant does not
need to be changed for another 5 yrs/150,000 miles (240,000 km). </P><A
name=ss13-1459491><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1459491&pubid=293&evc= sm#ss13-1459491">
<H5>Equipment (Coolant Exchangers)</A></H5>
The preferred method of performing coolant service is to use a coolant
exchanger. A coolant exchanger can replace virtually all of the old coolant with
new coolant. Coolant exchangers can be used to perform a coolant service without
spillage, and facilitate easy waste collection. They can also be used to lower
the coolant level in a vehicle to allow for less messy servicing of cooling
system components. It is recommended that you use a coolant exchanger with a
vacuum feature that allows easing [lsquo ]burping[rsquo ] (removing trapped air)
of the cooling system. This is a substantial time savings over current methods
of repeatedly thermocycling the vehicle and toping-off the radiator. The vacuum
feature also allows venting of a hot system to relieve system pressure. Approved
coolant exchangers are available through the GMDE (General Motors Dealer
Equipment) program (1-800-GM-TOOLS).</P>
</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
</FONT></TD></TR></TBODY></TABLE>
<P align=center>Š Copyright General Motors Corporation. All Rights
Reserved. </P>
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<TD align=middle width="50%">Document ID# 1459491
2003 HUMMER
H2
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