NHTSA ID Number: 10162151
Manufacturer Communication Number: PIT5692
TSB/Document Date: 2019-07-08
Summary
This Preliminary Information communication provides information to the technician about how to diagnosis a battery draw that may be caused by a module back feeding voltage in the ignition relay circuits making the vehicle think it is still awake.
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TSB/Document ID: PIT5692
Replacement Service Bulletin Number:
MFR Communication Date: 2019-06-24
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
Bulletin No.: PIT5692
Published date: 06/24/2019
Preliminary Information
PIT5692 Diagnostic Tip For 12 Volt Battery Going Dead Overnight
Models
Brand:
Model:
Model Years:
VIN:
from
to
Engine:
Transmissions:
Escalade Models
2017 - 2019
All
All
All
All
Suburban
2017 - 2019
All
All
All
All
Tahoe
2017 - 2019
All
All
All
All
Yukon Models
2017 - 2019
All
All
All
All
Involved Region or Country North America
Some customers may experience one or all the following concerns:
1) Battery draw which typically is between 5 and 6 amps
Condition
2) Radio backlighting will stay on even after the ignition has been turned o and the
key has been removed for several minutes
3) May Have current or history DTC: P2535
Cause
This concern may be caused by unwanted voltage at the ignition fuses fed by the
KR73 Ignition main relay in the X51L left Instrument Fuse box, with the Ignition o .
Correction:
If you experience any of the above concerns, check for voltage with a DVOM on all the fuses
that are fed by the KR73 Ignition relay. These fuses are all on the same Run/Crank Ignition
Buss Bar, in the Left I/P Fuse Block, and should not have any power with the ignition off. In
some cases, there may only be 2 or 3 volts present, so a voltmeter must be used to check for
voltage.
Example wiring diagram for the KR73 Ignition Main Relays and fuses is Document ID:
4501672.
If there is any voltage on the fuses with the ignition in the off position, remove fuses one at
a time to isolate which module is causing the concern. Once you have located the effected
module, Unplug the module and see if the back feed goes away. Once the module is isolated,
replace as needed.
TAC has seen some issues in the field where the K29F front heated seat module or the K29R
rear heated seat module may be causing the back feed concern.
Note: If you remove all the fuses fed by, the KR73 Ignition Main Relay and you cannot isolate
the concern down to a single fuse, Inspect the backside of the X51L Fuse block in the
instrument panel for corrosion. We have seen some cases where the front windshield or the
OnStar Antenna has a water leak and causes corrosion on the backside of the fuse box.
Version History
Version
Modi ed
1
06/24/2019 - Created on.
© 2019 General Motors
. All Rights Reserved.
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