PIT5745C
Service Bulletin Details
Public Details for: PIT5745C
This preliminary information communicates and issue with the memory seat module waking up the low speed gm lan bus and causing a battery draw.
- 2022 - 2021 - 2020 - 2019 - 2018 -
Models from 2022
Models from 2021
Models from 2020
Models from 2019
Models from 2018
Bulletin No.: PIT5745C Published date: 02/14/2022 Preliminary Information PIT5745C Diagnostic Tips - Intermittent Parasitic Battery Draw Below 40 Degrees F / Dead Battery / Slow Crank Models Brand: Model: Model Years: VIN: from to Engine: Transmissions: Buick Enclave 2018 - 2022 All All All All Buick Encore 2020 - 2022 All All All All Buick Encore GX 2020 - 2022 All All All All Buick Envision 2018 - 2020 All All All All Buick LaCrosse 2018 - 2019 All All All All Cadillac ATS 2018 - 2019 All All All All Cadillac CT6 2018 - 2020 All All All All Cadillac CTS 2018 - 2019 All All All All Cadillac Escalade Models 2018 - 2020 All All All All Cadillac XT4 2019 - 2022 All All All All Cadillac XT5 2018 - 2022 All All All All Cadillac XT6 2020 - 2022 All All All All Cadillac XTS 2018 - 2019 All All All All Chevrolet Blazer 2019 - 2022 All All All All Chevrolet Camaro 2018 - 2022 All All All All Chevrolet Corvette 2018 - 2019 All All All All Chevrolet Equinox 2018 - 2022 All All All All Chevrolet Impala 2018 - 2020 All All All All Chevrolet Malibu 2018 - 2022 All All All All Chevrolet Silverado 2018 - 2021 All All All All 2022 All All All All Chevrolet Silverado 2500HD/3500HD 2022 All All All All Chevrolet Suburban 2018 - 2020 All All All All Chevrolet Tahoe 2018 - 2020 All All All All Chevrolet Traverse 2018 - 2022 All All All All Chevrolet Trax 2020 - 2022 All All All All GMC Acadia 2018 - 2022 All All All All GMC Sierra 2018 - 2021 All All All All GMC Sierra 1500 (Limited, RPO J21, 12th VIN Digit = 4 or less) 2022 All All All Chevrolet Silverado 1500 (LTD, RPO J21, 12th VIN Digit = 4 or less) All Brand: Model Years: Model: VIN: from to Engine: Transmissions: GMC Sierra 2500HD/3500HD 2022 All All All All GMC Terrain 2018 - 2022 All All All All GMC Yukon Models 2018 - 2020 All All All All Involved Region or Country North America Condition 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 like: 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 History Version2 Modi ed 4 06/01/2020 - Created on. 02/17/2021 - Updated to add the Buick Enclave. 03/25/2021 - Update to Model list 02/14/2022 - Update to Model Years © 2022 General Motors. All Rights Reserved.