NHTSA ID Number: 10161017
Manufacturer Communication Number: PIT5638C
Summary
This Preliminary information communicates an issues with a Service Brake Assist Message With DTC C05B0 and/or C058E and that engineering released updated calibrations to correct the issue.
Condition
In some rare situations, a customer may comment on a “Service Brake Assist” message and they may have a hard brake pedal or increased effort is needed to depress the brake pedal, which may extend stopping distances. When checking for DTC’s, a current or history C0021, C05B0, and/or C058E will be set in the K160 Brake System Control Module (formerly known as the EBCM). When the EBCM DTCs are set, it will request the SES MIL and the ECM will set DTC P25A2 (Brake System Control Module Requested MIL Illumination).
Cause
This issue could be caused by an internal software calibration.
Correction:
NOTE: This PI only applies to vehicles involved in Service Update N192210460. For all other vehicles, or if the Service Update had been previously completed, follow normal SI diagnostics.
Engineering has released updated Brake System Control Module calibrations to address this condition. Reprogram the K160 Brake System Control Module with the latest calibrations currently available in Tis2Web, per Service Update N192210460.
Important: Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. Install the EL-49642 SPS Programming Support Tool to maintain system voltage. If not available, connect a fully charged 12 V jumper or booster pack disconnected from the AC voltage supply. DO NOT connect a battery charger.
2 Affected Products
Vehicles
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5638C
Published date: 05/15/2019
NHTSA ID Number: 10156931
Manufacturer Communication Number: PIT5638B
Summary
This Preliminary information communicates an issues with a Service Brake Assist Message With DTC C05B0 and/or C058E and that engineering released updated calibrations to correct the issue.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5638B
Published date: 03/14/2019
NHTSA ID Number: 10149056
Manufacturer Communication Number: PIT5638
Summary
This Preliminary information communicates an issues with a Service Brake Assist Message With DTC C053D or C058E and that engineering is working on updated software to correct this issue.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5638
Published date: 10/29/2018
Reprogramming
GM Diagnostic/Programming (TIS2Web)
Approved J2534 Device with TIS2WEB can reprogram 1996 and later All GM Modules.
To obtain the latest electronic controller calibration information for your vehicle, go to https://tis2web.service.gm.com/tis2web and enter the vehicle's 17 character Vehicle Identification Number (VIN) and select 'Get CAL ID’.
You can then compare the latest part number with the actual number installed on the vehicle to determine if a reprogram is needed.
The Service Programming System (SPS) application is part of the TIS2Web system. To program an ECU, the SPS application must communicate with the vehicle control modules using the proper J2534 programming interface tool.
The Tech 2 supports model years 1996 and beyond. With the addition of the CAN Diagnostic Interface (CANdi) module, Tech 2 is fully backward compatible with current Tech 2 functionality and operates transparently when diagnosing non-CAN-equipped vehicles.
Servicing the next generation Global A vehicles will require the diagnostic software, GDS2, Global Diagnostic System 2 running on a local PC device while the MDI is connected to the vehicle. The GM MDI is the Global Diagnostic tool for future vehicles starting with Global A vehicles.
The GM MDI was introduced in the fall of 2007 for Pass-Thru programming and offers faster programming speed. It can be used to perform Pass-Thru programming on all vehicles built since 1996 and into the future. Click here to view a list of GDS supported vehicles.
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SEOCONTENT-START
Bulletin No.: PIT5638C Published date: 05/15/2019
Preliminary Information PIT5638C Service Brake Assist Message with DTC C0021, C058E and/or C05B0
Product Investigation Review Required Models Brand: Chevrolet GMC Model: Silverado 1500 (New Model) Sierra 1500 (New Model) Model Years: 2019
2019 VIN:
from to
All All
All All Engine: All All Transmissions: All All Involved Region or Country Condition Cause North America
In some rare situations, a customer may comment on a “Service Brake Assist” message and they may have a hard brake pedal or increased effort is needed to depress the brake pedal, which may extend stopping distances. When checking for DTC’s, a current or history C0021, C05B0, and/or C058E will be set in the K160 Brake System Control Module (formerly known as the EBCM). When the EBCM DTCs are set, it will request the SES MIL and the ECM will set DTC P25A2 (Brake System Control Module Requested MIL Illumination).
This issue could be caused by an internal software calibration.
Correction:
NOTE: This PI only applies to vehicles involved in Service Update N192210460. For all other vehicles, or if the Service Update had been previously completed, follow normal SI diagnostics. Engineering has released updated Brake System Control Module calibrations to address this condition. Reprogram the K160 Brake System Control Module with the latest calibrations currently available in Tis2Web, per Service Update N192210460. Important: Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. Install the EL-49642 SPS Programming Support Tool to maintain system voltage. If not available, connect a fully charged 12 V jumper or booster pack disconnected from the AC voltage supply. DO NOT connect a battery charger.
Warranty Information
For vehicles repaired under the Bumper-to-Bumper coverage (Canada Base Warranty coverage), use the warranty information listed in Service Update N192210460. NOTE: This PI only applies to vehicles involved in Service Update N192210460.
Version History Version Modified
4
10/29/2018 – Created on
12/19/2018 – Supersedes to update the Title, Condition, Cause, Recommendation, and Warranty Sections
03/14/2019 – Supersedes to update the Title, Condition, correction and warranty sections.
05/15/2019 – Supersedes to update the Correction and Warranty sections
© 2019 General Motors. All Rights Reserved.
SEOCONTENT-END
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