# Service bulletin N182202780

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10160089
- Published by NHTSA: 2019\-05\-20
- Manufacturer's number: N182202780
- Manufacturer's date: 2019\-04\-10
- NHTSA component: SERVICE BRAKES

## NHTSA's summary

N182202780 \- Special Coverage Adjustment. In some circumstances, some 2014\-2017 model year Cadillac Escalade, Chevrolet Silverado, Chevrolet Suburban, Chevrolet Tahoe, GMC Sierra, and GMC Yukon vehicles may have a condition where customers may experience increased brake pedal effort, hard brake pedal, and/or potentially increased stopping distance. The condition is more prevalent at low speed when softly applying the brakes. The engine mounted mechanical vacuum pump output may decrease over time decreasing the amount of vacuum/power brake assist. Failure to follow recommended oil change intervals could contribute to this condition. The Driver?s Information Center, \(DIC\) ?Service brake assist? alert will activate 2\-5 minutes after the vacuum level drops, and a Diagnostic Trouble Code, \(DTC\) will also be set. Even where this condition occurs, the hydraulic brake system remains functional but may require additional pedal force. Please understand that even if the vehicle exhibits this condition, it meets all federal motor vehicle safety standards for brake performance. Dealers are to replace the vacuum pump and vacuum pump belt. The repairs will be made at no charge to the customer.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10160089-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10160089-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes

## Vehicles listed

- 2014 to 2016 CADILLAC ESCALADE ESV
- 2017 CADILLAC ESCALADE ESV
- 2017 CHEVROLET SILVERADO
- 2014 to 2016 CHEVROLET SILVERADO 1500
- 2014 to 2017 CHEVROLET SUBURBAN
- 2014 to 2017 CHEVROLET TAHOE
- 2017 GMC SIERRA
- 2014 to 2016 GMC SIERRA DENALI
- 2014 GMC YUKON XL
- 2015 to 2017 GMC YUKON XL

## Recalls for the same vehicles and component

- [2019533](/recalls/tc/2019533.md), 2019-10-24: Brakes
- [19V761000](/recalls/nhtsa/19V761000.md), 2019-10-24: SERVICE BRAKES; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:WHEEL SPEED SENSOR/TONE RING; ELECTRONIC STABILITY CONTROL \(ESC\)
- [19V645000](/recalls/nhtsa/19V645000.md), 2019-09-06: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM
- [2019324](/recalls/tc/2019324.md), 2019-06-28: Brakes
- [2018464](/recalls/tc/2018464.md), 2018-08-31: Brakes
- [18V578000](/recalls/nhtsa/18V578000.md), 2018-08-30: SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES
- [16V069000](/recalls/nhtsa/16V069000.md), 2016-02-05: SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES
- [2016053](/recalls/tc/2016053.md), 2016-02-04: Brakes
- [14V339000](/recalls/nhtsa/14V339000.md), 2014-06-19: SERVICE BRAKES, HYDRAULIC:POWER ASSIST; STEERING:HYDRAULIC POWER ASSIST SYSTEM
- [13V342000](/recalls/nhtsa/13V342000.md), 2013-08-06: SERVICE BRAKES, HYDRAULIC

## Other bulletins for the same vehicles and component

- [25\-NA\-065](/bulletins/11017173.md), 2025-04-24, Service bulletin: STEERING; SERVICE BRAKES; FUEL/PROPULSION SYSTEM. This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
- [21\-NA\-043](/bulletins/11014230.md), 2025-02-12, Service bulletin: VISIBILITY/WIPER; SERVICE BRAKES; ENGINE; ELECTRICAL SYSTEM; WHEELS. This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold \(prepping\) to the customer.
- [21\-NA\-043](/bulletins/11011709.md), 2024-12-10, Service bulletin: STRUCTURE:BODY; WHEELS; ENGINE; SERVICE BRAKES; UNKNOWN OR OTHER. This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold \(prepping\) to the customer.
- [PIT5282G](/bulletins/11007761.md), 2024-09-13, Service bulletin: SERVICE BRAKES. This Preliminary Information communication provides information to the technician that a customer may request the factory Integrated Trailer Brake Control be bypassed and their aftermarket trailer brake controller be installed instead. Technician will need to gain access to the body harness. Install trailer brake controller harness General Motors part number 23184088 into Middle Bus Electrical Center \(X61A\).
- [PIT5509L](/bulletins/11007691.md), 2024-09-11, Service bulletin: SERVICE BRAKES. This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System” message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system that is being used. The Chassis Control Module can be sensitive to a variety of trailer wiring issues. The technician will need to make a trailer tester using Electric Trailer Brake Magnets and 7\-way trailer connector to determine if it is a vehicle or trailer issue. If the concern is not duplicated with the tester installed, the vehicle is operating correctly and the focus should be on the trailer wiring or 7 way connector.
- [PIT6212](/bulletins/11007686.md), 2024-09-11, Service bulletin: SERVICE BRAKES. This Preliminary information communicates an issue with the Hydrastar Electric Over Hydraulic trailer brake system causing a voltage spike into the trucks electrical system which is causing DTC C1114 to set.
- [22\-NA\-244](/bulletins/11000550.md), 2024-05-30, Warranty extension: ELECTRICAL SYSTEM; EXTERIOR LIGHTING; STRUCTURE:BODY; UNKNOWN OR OTHER; SERVICE BRAKES. This service bulletin provides information about GM Accessories \- Dealer\-Installed, Repaired or Replaced During Warranty Coverage Period.
- [PIP5596A](/bulletins/10253061.md), 2024-04-15, Service bulletin: SERVICE BRAKES; FUEL SYSTEM, GASOLINE. This Preliminary information communicates that when removing the fuel line jumper hose care should be taken to be sure the line is reinstalled correctly to avoid a no/low fuel pressure situation.
- [PIT5479F](/bulletins/10251685.md), 2024-03-18, Service bulletin: SERVICE BRAKES. This Preliminary Information communication provides information to the technician about fluid leaking from the brake caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston installation. This grease can be cleaned off and the rest of the service completed.
- [22860](/bulletins/10248438.md), 2024-01-08, Service bulletin: ELECTRICAL SYSTEM:WIRING; SERVICE BRAKES. Harness Trapped Under MBEC

JSON: [/v1/bulletins/10160089](/v1/bulletins/10160089)

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