Hummer Forums by Elcova - Seats no power?

<Table>
<H1>Seat
Heater and/or Memory Power Seat Inoperative (Replace Memory Seat Control Module)
#03-08-50-003 - (Jan 21, 2003) </H1>
Seat Heater and/or
Memory Power Seat Inoperative (Replace Memory Seat Control Module) 
2003 Cadillac
Escalade, Escalade ESV, Escalade EXT 
2003 Chevrolet
Avalanche, Silverado, Suburban, Tahoe 
2003 GMC Sierra,
Yukon, Yukon XL, Yukon Denali, Yukon Denali XL 
2003 HUMMER H2

<DIV class=Sect>
<H2>Condition </H2>
Some customers may
comment that the seat heater and/or memory seat functions are inoperative.
</DIV>
<DIV class=Sect>
<H2>Cause </H2>
A logic lockup of
the memory seat control module may cause this condition. </DIV>
<DIV class=Sect>
<H2>Correction </H2>
Important 
This repair is not to be performed on vehicles without
memory/heated seats. If the vehicle does not have memory/heated seats but has an
inoperative power seat, use published Service Information to diagnose the
concern. 
If the seat is currently inoperable, perform the
following diagnostic steps to determine if replacement of the memory seat
control module is the correct repair:

<LI>Connect a Tech 2® to the vehicle and monitor
the parameters in the sensor data list for the driver seat module as you try to
move the seat. Are the displayed data parameters changing, or does the Tech 2®
display no communication as the seat switch is moved to various positions? If
the data parameters do not change, the memory seat control module may be
inoperative due to a logic lockup. 
<LI style="LINE-HEIGHT: 18px">Remove the SEAT
circuit breaker in the instrument panel relay block located under the left side
of the instrument panel next to the parking brake. This circuit breaker also
supplies power to the passenger seat. 
<LI>Verify that the circuit breaker is not open. If
it is not open, wait 30 seconds and then reinstall the circuit breaker. 
<LI style="LINE-HEIGHT: 18px">Try to move the seat
again. 
<LI>If the seat moves or the data parameters
displayed on the Tech 2® change when the seat switch is activated, replace the
memory seat control module. Use the Memory Seat Control Module Replacement
procedure in SI. 
<LI>If the memory seat is still inoperative, use
normal Service Manual diagnostics to determine the cause of this condition.
</LI>

Service Information
Page 2
of 2

Parts
Information
[img]images/seat inoperative_img_0.jpg[/img]
Parts are currently
available from GMSPO. </DIV>
<DIV class=Sect>
<H2 style="TEXT-ALIGN: justify">Warranty
Information
</H2>
For vehicles repaired under warranty, use:
[img]images/seat inoperative_img_1.jpg[/img]</DIV></Table>