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Service bulletin 21710

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 id10090403
Published by NHTSA2017-02-03
Manufacturer's number21710
Manufacturer's date2016-03-17
NHTSA componentPOWER TRAIN:MANUAL TRANSMISSION

NHTSA's summary

21710 - SERVICE UPDATE. SOME VEHICLES EQUIPPED WITH A MANUAL TRANSMISSION (PRO N8D), MAY HAVE A LOOSE SHIFT LEVER. DEALERS WILL ENSURE THE MANUAL SHIFT LEVER IS PROPERLY SECURED TO THE TRANSMISSION STUB SHAFT.

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

Transmission and driveline, Manual transmission

Vehicles listed
CHEVROLET COLORADO2015, 2016
GMC CANYON2015, 2016

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
990420002L2021-08-09. Service bulletin. This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation.
030729004L2019-05-20. Service bulletin. This informational bulletin provides normal operating characteristics and diagnostic information on Manual transmissions.
PIP5219A2018-06-04. Service bulletin. This Preliminary Information communication advises the technician that the 6 Speed Manual Transmission (N8D) has been placed on an Exchange program. Dealer will need to call General Motors Product Quality Center for further assistance.
14-07-30-001E2018-05-21. Service bulletin. This informational bulletin provides technicians with information to assist in identifying operating characteristics of manual transmissions that repair attempts will not change.
03-07-29-004J2018-05-21. Service bulletin. This informational bulletin provides technicians with information to assist in identifying operating characteristics of manual transmissions that repair attempts will not change.
PIP5375E2018-05-21. Service bulletin. This Preliminary Information communication advises the technician that the rear wheel drive manual transmission restriction has ended.
PIP5219B2017-08-15. Service bulletin. This Preliminary Information communication advises the technician that the 6 Speed Manual Transmission (N8D) has been placed on an Exchange program. Dealer will need to contact General Motors Product Quality Center for further assistance.
PIP52192017-08-15. Service bulletin. This Preliminary Information communication advises the technician that the Colorado/Canyon 6 Speed Manual Transmission Exchange program will be administered by the General Motors Product Quality Center. Dealer will need to call General Motors Product Quality Center for further assistance.
PIP5375A2017-03-22. Service bulletin. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN REAR WHEEL DRIVE MANUAL TRANSMISSIONS HAVE BEEN PLACED ON RESTRICTION. DEALER WILL NEED TO CONTACT GENERAL MOTORS PRODUCT QUALITY CENTER FOR FURTHER ASSISTANCE.
PIP53752017-03-22. Service bulletin. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN REAR WHEEL DRIVE MANUAL TRANSMISSIONS HAVE BEEN PLACED ON RESTRICTION. DEALER WILL NEED TO CONTACT GENERAL MOTORS PRODUCT QUALITY CENTER FOR FURTHER ASSISTANCE.