# Service bulletin PIT4648D

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: 10112505
- Published by NHTSA: 2017\-08\-15
- Manufacturer's number: PIT4648D
- Manufacturer's date: 2012\-10\-22
- NHTSA component: ELECTRICAL SYSTEM:WIRING; SERVICE BRAKES, AIR:ANTILOCK:WHEEL SPEED SENSOR

## NHTSA's summary

This Preliminary Information communication provides information to the technician about vehicles that have a Antilock Braking System Malfunction Indicator Lamp on and or the service Stability message on. Technician may find Diagnostic Trouble Code C0045 and or C0050 found in the Electronic Brake Control Module. Technician will need to inspect the wires/crimps/terminals at the suspect Wheel Speed Sensor connector.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2012/MC-10112505-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2012/MC-10112505-0001.pdf)

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

## Components

Brakes, Electrical system, Anti\-lock brakes, Wheel speed sensor, Wiring and fuses

## Trouble codes named

C0045, C0050

## Vehicles listed

- 2008 to 2012 CHEVROLET EXPRESS
- 2008 to 2012 GMC SAVANA

## Recalls for the same vehicles and component

- [23V247000](/recalls/nhtsa/23V247000.md), 2023-04-06: ELECTRICAL SYSTEM:WIRING

## Other bulletins for the same vehicles and component

- [130089008](/bulletins/10246630.md), 2023-12-11, Service bulletin: ELECTRICAL SYSTEM:WIRING. GM Wiring Repair Strategy Information
- [PIT5058G](/bulletins/10197310.md), 2021-06-14, Service bulletin: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT; SERVICE BRAKES, HYDRAULIC. This Preliminary Information communication provides information to the technician about the operation and diagnostics of the Regular Production Option Code UJ1 brake warning pressure warning system. The technician can test the operation of the brake warning system. If the warning system does not function correctly, technician will need to inspect circuit 33 for a short to ground between X141 and the Instrument Panel Cluster terminal 14. Then inspect check circuit 33 for an open between X141 and the Instrument Panel Cluster terminal 14. Also technician should check male side of X141 circuit 33 with an ohm meter to ground and should be close to 0 ohms with engine off and key on. Start engine and circuit should go \(OL\) indicating that the flow switch opened. Then, turn the steering to the stop in pressure relief and verify that the circuit stays \(OL\) to check the operation of the pressure switch.
- [PIT3271J](/bulletins/10168960.md), 2019-12-09, Service bulletin: WHEELS; SERVICE BRAKES, AIR:ANTILOCK. This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.
- [100089005G](/bulletins/10159575.md), 2019-05-13, Service bulletin: ELECTRICAL SYSTEM:WIRING. This warranty admin bulletin explains to the technician additional information may be needed when submitting transactions when doing wiring repairs.
- [100089005H](/bulletins/10154629.md), 2019-03-18, Service bulletin: ELECTRICAL SYSTEM:WIRING. This warranty admin bulletin explains to the technician additional information may be needed when submitting transactions when doing wiring repairs.
- [10\-00\-89\-005C](/bulletins/10139026.md), 2018-06-04, Service bulletin: ELECTRICAL SYSTEM:WIRING; EQUIPMENT. This informational bulletin is a revision for 10\-00\-89\-005B to add the 2014 model year and labor codes.
- [18NA102](/bulletins/10137539.md), 2018-05-21, Service bulletin: ELECTRICAL SYSTEM:WIRING. This technical bulletin provides a procedure to repair a possible wiring harness repair if damaged by the parking bark, brake booster mount or brake pedal bolt.
- [10\-00\-89\-005E](/bulletins/10137237.md), 2018-05-21, Service bulletin: ELECTRICAL SYSTEM:WIRING. This warranty administration bulletin adds the 2016 model year to a communication which provides dealership personnel revised wiring repair labor operations and required additional information.
- [13\-00\-89\-008A](/bulletins/10135394.md), 2018-05-07, Service bulletin: ELECTRICAL SYSTEM:WIRING. This informational bulletin communicates GM wiring repair strategy information.
- [13\-08\-116\-001](/bulletins/10133149.md), 2018-04-16, Service bulletin: ELECTRICAL SYSTEM:WIRING. This technical bulletin provides a procedure on suspected tampering due to aftermarket ALDL or DLC interface devices causing multiple issues.

JSON: [/v1/bulletins/10112505](/v1/bulletins/10112505)

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