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Service bulletins for the 2016 Cadillac CT6

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.

1371 on file from NHTSA, as of 2026-10-19.

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By component

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Only bulletins with component: 12-volt battery are shown. Show all

Bulletins, newest first
PIC4541F2017-08-15. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. This Preliminary Information communication provides information to the technician with a diagnostic tip for the OnStar back-up battery failure. Technician may find Diagnostic Trouble Code B1446 or B1447 and the OnStar LED is red. Technician should never disconnect the main vehicle battery or remove the OnStar fuse with the ignition key in any position other than off.
15-06-03-002B2017-08-15. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT. This informational bulletin provides information on Original Equipment Batteries Part Number and ACDelco Replacement Battery Approved Warranty Part Numbers
438802017-01-23. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. 43880 - SERVICE UPDATE. FOR VEHICLES EQUIPPED WITH A START/STOP ENGINE CONTROL OPTION (RPO KL9), THE SYSTEM LEVEL INTERACTIONS RELATED TO THE TRANSITION OF RUN/CRANK AND ACCESSORY INPUTS TO THE ENGINE CONTROL MODULE (ECM) DURING A CRANK EVENT ARE COMPROMISED. THIS RESULTS IN COMMUNICATION ISSUES BETWEEN THE ECM AND THE INTELLIGENT BATTERY SENSOR. THE CHECK ENGINE LIGHT WILL ILLUMINATE AND THE START/STOP SYSTEM IS SUSPENDED WHILE THE FAULT IS ACTIVE, RESULTING IN DEGRADED FUEL ECONOMY. DEALERS ARE TO REPROGRAM THE ENGINE CONTROL MODULE.
PIE03742016-10-19. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ENGINE; ELECTRICAL SYSTEM. THIS ENGINEERING INFORMATIONAL BULLETIN IS REQUESTING INFORMATION FROM THE FIELD ON VEHICLES THAT HAVE THE CONDITION OF A NO CRANK NO START DUE TO A DISCHARGED BATTERY.
030603004R2016-10-18. Service bulletin. ENGINE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. THIS INFORMATIONAL BULLETIN PROVIDES INFORMATION ON HOW TO TEST A BATTERY AND WHAT IS NEEDED TO WARRANTY A BATTERY.
16-NA-1872016-10-11. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. THIS TECHNICAL BULLETIN PROVIDES A PROCEDURE TO REPROGRAM THE KEYLESS ENTRY CONTROL MODULE DUE TO AN INTERNAL SOFTWARE CALIBRATION CAUSING A LOW BATTERY DUE TO THE LOCK AND UNLOCK LIGHTS FLASHING INTERMITTENTLY.
PIC-4935-E2016-08-17. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO HELP THE DEALERSHIP TECHNICIANS PERFORM A PARASITIC DRAIN TEST FOR THE ONSTAR MODULE. WHEN PERFORMING BATTERY PARASITIC DRAIN TEST, THERE MAY BE SOME CONFUSION AS TO WHAT THE NORMAL POWER CONSUMPTION READING SHOULD BE FROM THE ONSTAR SYSTEM.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.