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NHTSA ID Number: 10178303
Manufacturer Communication Number: PIT5745
Summary
This Preliminary information communicates and issue with the memory seat module waking up the low speed GM lan bus and causing a battery draw.
72 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| BUICK | ENVISION | 2018-2020 |
| BUICK | LACROSSE | 2018-2019 |
| CADILLAC | ATS | 2018-2019 |
| CADILLAC | CT6 | 2018-2020 |
| CADILLAC | CTS | 2018-2019 |
| CADILLAC | ESCALADE | 2018-2020 |
| CADILLAC | ESCALADE ESV | 2018-2020 |
| CADILLAC | XT4 | 2019-2020 |
| CADILLAC | XT5 | 2018-2020 |
| CADILLAC | XT6 | 2020 |
| CADILLAC | XTS | 2018-2019 |
| CHEVROLET | BLAZER | 2019-2020 |
| CHEVROLET | CAMARO | 2018-2020 |
| CHEVROLET | CORVETTE | 2018-2019 |
| CHEVROLET | EQUINOX | 2018-2020 |
| CHEVROLET | IMPALA | 2018-2020 |
| CHEVROLET | MALIBU | 2018-2020 |
| CHEVROLET | SILVERADO 1500 | 2018-2020 |
| CHEVROLET | SUBURBAN | 2018-2020 |
| CHEVROLET | TAHOE | 2018-2020 |
| CHEVROLET | TRAVERSE | 2018-2020 |
| GMC | ACADIA | 2018-2020 |
| GMC | SIERRA 1500 | 2018-2020 |
| GMC | TERRAIN | 2018-2020 |
| GMC | YUKON | 2018-2020 |
| GMC | YUKON DENALI | 2018-2019 |
| GMC | YUKON DENALI XL | 2018 |
| GMC | YUKON XL | 2018-2020 |
SEOCONTENT-START
Bulletin No.: PIT5745
Published date: 06/2/2020
Preliminary Information
PIT5745 Diagnostic Tips – Intermittent Parasitic Battery Draw Below 40 Degrees F / Dead Battery /
Slow Crank
Models
Brand: Buick
Model:
Model Years: 2018 – 2020
VIN:
from to
All All
Engine: All
All
Transmissions:
Buick Cadillac Cadillac Cadillac Cadillac Cadillac Cadillac Cadillac Cadillac Chevrolet Chevrolet
Chevrolet Chevrolet Chevrolet Chevrolet Chevrolet Chevrolet Chevrolet Chevrolet GMC GMC GMC GMC
LaCrosse ATS
CT6 CTS
Escalade Models XT4
XT5 XT6 XTS
Blazer Equinox Impala Malibu Camaro Corvette Silverado Suburban Tahoe Traverse Acadia Sierra
Terrain
Yukon Models
2018 – 2020
2018 – 2019
2018 – 2020
2018 – 2019
2018 – 2020
2019 – 2020
2018 – 2020
2020
2018 – 2019
2019 – 2020
2018 – 2020
2018 – 2020
2018 – 2020
2018 – 2020
2018 – 2019
2018 – 2020
2018 – 2020
2018 – 2020
2018 – 2020
2018 – 2020
2018 – 2020
2018 – 2020
2018 – 2020
All All All All All All All All All All All All All All All All All All All All All All All
All All All All All All All All All All All All All All All All All All All All All All All
All All All All All All All All All All All All All All All All All All All All All All All
All All All All All All All All All All All All All All All All All All All All All All All
Involved Region or Country Condition
North America
Some customers may comment on the following conditions when the ambient temperature is below 40
degrees F:
• Dead battery/required jump start
• Slow crank
• Battery low state of charge, and if equipped, Auto Start/Stop inoperative
• IPC backlighting turning on intermittently while the vehicle should be asleep
• Keyless or passive entry/start inoperative
These concerns are not easily duplicated in the service bay or with temperatures
above 40 degrees F.
Note: The condition is intermittent and ONLY occurs when the vehicle has been outside overnight or
longer and the ambient air temperature is below 40F for extended periods of time.
Cause
These conditions may be due to a low battery state of charge that is being caused by one or more
modules waking up the Low Speed GM LAN Bus. It has been found that the Seat Memory Control Module
(SMCM) could inadvertently wake up the Low Speed GM LAN Bus when the ambient air temperature is
below 40 degrees
F. This condition could apply to all SMCM a vehicle is equipped with like: Driver K40, Passenger K40P, Left Rear K40LR and/or Right Rear K40RR .
Correction:
Before any in depth diagnosis is performed, question the customer or inspect the vehicle for any
type of aftermarket equipment. If no aftermarket equipment is found, try to duplicate the
conditions by leaving the vehicle outside overnight in temperatures below 40 degrees F.
Note: Temperatures below 40 degrees F is critical to reproducing the condition.
Perform all steps as appropriate in the Battery Electrical Drain/Parasitic Load Test procedure in
Service Information. If an excessive battery draw is duplicated, as part of the Circuit/System
Testing procedure, remove the fuse(s) that powers the SMCM. Wait several minutes to see if the
vehicle will return to an acceptable battery draw level. If so, replace the appropriate SMCM.
This condition could apply to all SMCM a vehicle is equipped with lik e: Driver K40, Passenger
K40P, Left Rear K40LR and/or Right Rear
K40RR.
Note: There may be more than one fuse which powers the SMCM.
If the battery draw does not return to an acceptable level with the SMCM fuse(s) removed, then
continue with normal SI diagnostics.
Warranty Information
For vehicles repaired under the Bumper-to-Bumper coverage (Canada Base Warranty coverage), use the
appropriate labor operation for which Seat Memory Control Module is replaced. Reference the
Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information.
Additional SI Keywords
B1325 C0800 B1517
Version History
Version 1
Modified 06/01/2020 – Created on.
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5745
Published date: 06/2/2020
https://www.nhtsa.gov/recalls?nhtsaId=10178303
MC-10178303-9999.pdf 103.562KB
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