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Service bulletin 27621

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 id10089320
Published by NHTSA2017-01-23
Manufacturer's number27621
Manufacturer's date2016-06-01
NHTSA componentTRAILER HITCHES; EQUIPMENT

NHTSA's summary

27621 - CUSTOMER ADVISORY LETTER MAILING. LETTER MAILING TO OWNERS ADVISING THAT THE VEHICLE MAY HAVE BEEN BUILT WITH A HEAVY-DUTY TRAILER HITCH RATED AT 7,000 LB INSTEAD OF THE 3,500 LB TRAILERING PACKAGE VEHICLE BUILD SPECIFICATION. IF THE VEHICLE WAS BUILT WITH A 7,000 LB TRAILER HITCH, IT IS STILL LIMITED TO A MAXIMUM TRAILER WEIGHT OF 3,500 LB. TOWING A TRAILER WHOSE WEIGHT IS MORE THAN 3,500 LB COULD AFFECT POWERTRAIN COOLING, POTENTIALLY RESULTING IN AN OVERHEAT CONDITION OR COULD CHANGE THE WAY THE VEHICLE HANDLES.

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

Equipment and accessories, Trailer hitch

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.

Recalls for the same vehicles and component
20155752015-11-30. Accessories

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
20-NA-1322024-04-23. Service bulletin. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
17-NA-0522024-04-23. Service bulletin. This bulletin updates the position of General Motors on refinishing aluminum wheels. GM has determined that wheel refinishing under warranty will no longer be performed.
20-NA-1322024-04-05. Service bulletin. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
PIT5401E2024-04-01. Service bulletin. Radio Inoperative with No Communication and DTC U0184
PIT53582024-04-01. Service bulletin. Repetitive Popping Noise From All Speakers.
PIT53572024-04-01. Service bulletin. VIS / GWM / IVH May Not Match Actual Audio System of Vehicle.
PIT53542024-04-01. Service bulletin. Identifying If A Vehicle Is Equipped With OnStar 4G LTE Wi-Fi.
PIT53532024-04-01. Service bulletin. XM Audio Traffic And Travel Link Availability And Operation.
23-NA-1032024-03-29. Service bulletin. This service bulletin provides information on submitting quality Photos of Various Vehicle Concerns to the GM Technical Assistance Center (TAC).
11-00-89-005X2024-03-19. Service bulletin. This Warranty Administration bulletin provides information on Dealer Empowerment for Goodwill, Customer Enthusiasm and Policy (U.S. Only).