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Service bulletin G-209669

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 id10079544
Published by NHTSA2016-09-08
Manufacturer's numberG-209669
Manufacturer's date2015-01-30
NHTSA componentENGINE

NHTSA's summary

14390 - SPECIAL COVERAGE. ON SOME 2012-2014 MODEL YEAR CHEVROLET TAHOE VEHICLES EQUIPPED WITH RPO PPV OR 5W4, UNDER CERTAIN OPERATING CONDITIONS, SOME POLICE PACKAGE VEHICLES HAVE EXPERIENCED INFREQUENT ENGINE-IDLE PROBLEMS AND MOMENTARY POOR LOW-SPEED ENGINE PERFORMANCE. THESE PERFORMANCE ISSUES CAN BE TRIGGERED IF BOTH OF THE FOLLOWING CONDITIONS ARE SATISFIED: (I) THE VEHICLE IS OPERATED IN AMBIENT TEMPERATURES THAT EITHER EXCEED 100 DEGREES FAHRENHEIT IN A LOW-HUMIDITY ENVIRONMENT OR THAT EXCEED 85 DEGREES FAHRENHEIT IN A HIGH-HUMIDITY ENVIRONMENT; AND (II) THE VEHICLE IS OPERATED AT IDLE FOR A LONG PERIOD OF TIME, AT IDLE AFTER HEAVY POWERTRAIN USAGE, OR WITH A HEAVY ELECTRICAL LOAD. THE CONDITION CAUSES ENGINE-IDLE RPM FLUCTUATIONS (450-1000 RPM) AND HESITATION DURING ACCELERATION. WHILE GM HAS RECEIVED SOME FIELD REPORTS OF ENGINE STALLS AT IDLE, GM HAS NOT BEEN ABLE TO CONFIRM THESE REPORTS. GM HAS ONLY BEEN ABLE TO DUPLICATE A SIMILAR STALL BY OPERATING A TEST VEHICLE AT A TEMPERATURE THAT IS AT THE LIMIT OF THE FUEL’S HIGH-TEMPERATURE SPECIFICATION. IF SUCH A STALL DID OCCUR, THE STALL WOULD BE AT IDLE OR LOW SPEED, AND ALL ELECTRICAL AND SAFETY SYSTEMS WOULD CONTINUE TO FUNCTION AS DESIGNED. IF THE CONDITION OCCURS WITHIN THE SPECIAL COVERAGE TERMS, DEALERS ARE TO UPDATE THE ENGINE CONTROL MODULE (ECM) AND BODY CONTROL MODULE CALIBRATIONS.

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

Engine

Vehicles listed
CHEVROLET TAHOE2012, 2013, 2014

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

Recalls for the same vehicles and component
16V8680002016-12-02. ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN

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

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