# Service bulletin PIT4593

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: 10024544
- Published by NHTSA: 2008\-04\-24
- Manufacturer's number: PIT4593
- Manufacturer's date: 2009\-02\-01
- Replaces: PIT\-4593B
- NHTSA component: SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES; SERVICE BRAKES, HYDRAULIC:POWER ASSIST

## NHTSA's summary

\(HYBRID\) NO BRAKE ASSIST AFTER A BATTERY DISCONNECT. WITH RPO HP2. \*NJ UPDATED 12/3/08. \*PE UPDATED 8/19/09. \*PE

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Brakes

## Vehicles listed

- 2009 CADILLAC ESCALADE
- 2009 CHEVROLET SILVERADO
- 2008 to 2009 CHEVROLET TAHOE
- 2009 GMC SIERRA
- 2008 to 2009 GMC YUKON

## Other bulletins for the same vehicles and component

- [PIT5120A](/bulletins/10247720.md), 2023-12-26, Service bulletin: SERVICE BRAKES. Stabilitrak/Traction Control OFF With Red Brake Warning Lamp
- [PIT4729E](/bulletins/10247669.md), 2023-12-26, Service bulletin: EQUIPMENT; SERVICE BRAKES. Adding Integrated Trailer Brake Controller RPO JL1.
- [PIT5161B](/bulletins/10247072.md), 2023-12-11, Service bulletin: SERVICE BRAKES. Bump Feel Or Clunk Noise After A Stop.
- [PIT4729E](/bulletins/10245308.md), 2023-11-20, Service bulletin: SERVICE BRAKES; TRAILER HITCHES. Adding Integrated Trailer Brake Controller RPO JL1.
- [23\-NA\-144](/bulletins/10242252.md), 2023-09-15, Service bulletin: SERVICE BRAKES. This technical bulletin provides information and a solution to a condition of Brake Pedal Moves or Self Applies at Full Turns.
- [PIT3665L](/bulletins/10226382.md), 2022-11-21, Service bulletin: SERVICE BRAKES. This Preliminary Information communication advises the technician that the Hydro\-Boost is not serviceable and will need to be replaced if the brake pedal moves or applies on its own at a full turn.
- [15\-00\-89\-004E](/bulletins/10222777.md), 2022-10-11, Service bulletin: POWER TRAIN; SUSPENSION; ENGINE AND ENGINE COOLING; SERVICE BRAKES, HYDRAULIC; STEERING. This service bulletin provides technicians with updated information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
- [070316004D](/bulletins/10213760.md), 2022-06-13, Service bulletin: SERVICE BRAKES. This service bulletin provides information for tire pressure monitoring \(TPM\) system concerns.
- [PIP4723F](/bulletins/10208027.md), 2022-02-14, Service bulletin: SERVICE BRAKES, HYDRAULIC; FUEL SYSTEM, GASOLINE. This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and Vehicle Data Recorder tools, giving website address and step by step instructions to complete the update.
- [PIT4595J](/bulletins/10197287.md), 2021-06-14, Service bulletin: SERVICE BRAKES; ELECTRICAL SYSTEM. This PI communicates diagnostic tips to help dealership diagnosis a service trailer brake message with DTC C1114 and C1112.

JSON: [/v1/bulletins/10024544](/v1/bulletins/10024544)

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