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Service bulletin PIT5662B

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10160977
Published by NHTSA2019-06-10
Manufacturer's numberPIT5662B
Manufacturer's date2019-05-03
NHTSA componentPARKING BRAKE

NHTSA's summary

This Preliminary information communicates information to diagnose DTC C056D or C056E.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Brakes, Parking brake

Trouble codes named

C056D, C056E

Vehicles listed
BUICK ENCLAVE2018, 2019
CADILLAC XT52017, 2018, 2019
CHEVROLET BLAZER2019
CHEVROLET SILVERADO 15002019 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET TRAVERSE2018, 2019
GMC ACADIA2017, 2018, 2019
GMC SIERRA 15002019 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
PIT5662G2022-04-18. Service bulletin. This Preliminary information communicates information to diagnose DTC C056D or C056E.
20-NA-2072022-03-16. Service bulletin. This service bulletin informs the technician to inspect for a possible electrical concern at the ECM X2 electrical connector to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated - DTC P0333 Set.
PIT5662F2021-09-13. Service bulletin. This Preliminary information communicates information to diagnose DTC C056D or C056E.
19NA1362021-02-01. Service bulletin. This service bulletin provides a diagnostic procedure to aid in correcting a customer concern of a Howling, Whining/Whirring Noise, Shudder/Vibration and/or Grinding Noise While in 4HI, 4HI Auto and/or During Parking Lot Maneuvers in Auto Mode.
PIT5662D2020-02-10. Service bulletin. This Preliminary information communicates information to diagnose DTC C056D or C056E.
PIT5657B2019-11-12. Service bulletin. This Preliminary information communicates how to repair a loose shift cable bracket.
19NA0352019-05-20. Service bulletin. This technical bulletin provides a procedure to validate if the parking pawl actuator is not working as intended, causing the parking pawl to engage while driving.
PIT5441C2019-04-08. Service bulletin. This Preliminary Information communication provides information to the technician the steps to diagnose and repair vehicles that may have an Object Detection System Message Diagnostic Trouble Codes U0075, U026A, U026B, U026C, U0265, U0268, and/or U0269 stored in the active safety module. Technician should inspect his Multiple Diagnostic Interface cable for damage. Technician should use the Multiple Diagnostic Interface on a like vehicle with object detection bus or theEL-47955-1 MDI 1, MDI 2 Self-Test Loopback Adapter,if there are no issues found finish with diagnosing the customer’s concern, if concern is present in the like vehicle replace the Multiple Diagnostic Interface cable.
PIT5657A2019-04-08. Service bulletin. This Preliminary information communicates how to repair a loose shift cable bracket.
18NA3682019-03-25. Service bulletin. This technical bulletin provides a procedure to reset the parking assist module if the parking assist message is on when delivered to the dealership.