PIT5490B
Service Bulletin Details
Public Details for: PIT5490B
This preliminary information communication provides information to the technician about vehicles that may have a service trailer brake message in the driver information center. Also the vehicle will have a diagnostic trouble code U0415 set.
- 2020 - 2019 - 2018 - 2017 - 2016 - 2015 - 2014 -
Models from 2019
| 2019 CHEVROLET SILVERADO 4500HD |
| 2019 CHEVROLET SUBURBAN |
| 2019 CHEVROLET TAHOE |
| 2019 GMC SIERRA DENALI |
| 2019 GMC YUKON DENALI |
Models from 2018
| 2018 CHEVROLET SILVERADO 1500 |
| 2018 CHEVROLET SUBURBAN |
| 2018 CHEVROLET TAHOE |
| 2018 GMC SIERRA 1500 |
| 2018 GMC YUKON DENALI |
Models from 2017
| 2017 CHEVROLET SILVERADO 1500 |
| 2017 CHEVROLET SUBURBAN |
| 2017 CHEVROLET TAHOE |
| 2017 GMC SIERRA 1500 |
| 2017 GMC YUKON DENALI |
Models from 2016
| 2016 CHEVROLET SILVERADO 2500 |
| 2016 CHEVROLET SUBURBAN |
| 2016 CHEVROLET TAHOE |
| 2016 GMC SIERRA 2500 |
| 2016 GMC YUKON DENALI |
Models from 2015
| 2015 CHEVROLET SILVERADO 2500 |
| 2015 CHEVROLET SUBURBAN |
| 2015 CHEVROLET TAHOE |
| 2015 GMC SIERRA 2500 |
| 2015 GMC YUKON DENALI |
Models from 2014
| 2014 CHEVROLET SILVERADO 1500 |
| 2014 GMC SIERRA 1500 |
Bulletin No.: PIT5490B Published date: 03/20/2020 Preliminary Information PIT5490B Diagnostic Tip - Service Trailer Brake Message With DTC U0415 Models Brand: Model: Model Years: VIN: from to Engine: Transmissions: Chevrolet Silverado 1500 2014 All All All All Chevrolet Silverado 2015 - 2018 All All All All Chevrolet Silverado LD 2019 All All All All Chevrolet Suburban 2015 - 2020 All All All All Chevrolet Tahoe 2015 - 2020 All All All All GMC Sierra 1500 2014 All All All All GMC Sierra 2015 - 2018 All All All All GMC Sierra Limited 2019 All All All All GMC Yukon Models 2015 - 2020 All All All All Supersession Statement This PI was superseded to update the model year. Please discard PIT5490A. The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. Condition / Concern Some owners may comment of a Service Trailer Brake message in the DIC. When checking for DTC's, a U0415 "Invalid Data Received From Electronic Brake Control Module" may be set in the Chassis Control Module. It may also be noticed that this message occurs during hard braking, acceleration and/or turns. This concern could be caused by the brake fluid level near the minimum level. The brake fluid level sensor may momentarily signal the brake fluid level is low as the brake fluid sloshes in the master cylinder reservoir during hard braking, acceleration and/or turns. The brake fluid level sensor is a direct input to the EBCM. The EBCM sends the brake fluid level data to the Chassis Control module via the High Speed LAN communication buss. When the Chassis Control Module received the message that the brake fluid level was low, it sets DTC U0415 and commands the "Service Trailer Brake" message on. The brake fluid level sensor data can be monitored using the Scan Tool (GDS2) under the EBCM Antilock Braking Data list parameter "Brake Fluid Level Sensor". It will display either "OK" or "Low". Recommendations / Instructions Fill the master cylinder brake fluid reservoir to the maximum level. Note: The brake fluid level could be low due to normal brake pad wear, leaks, etc. Inspect the truck to determine why the brake fluid level was low. If no brake fluid leaks are found and it is not the result of brake pad wear, inspect the rear of the master cylinder to determine if it may be leaking into the brake booster. Refer to Brake Fluid Loss in SI. Warranty Information The correction for this concern may be one of several repairs described above. For vehicles repaired under warranty, please use the appropriate warranty labor operation based on the actual cause and repair. Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. © 2020 General Motors. All Rights Reserved.