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Service bulletin MC-15521

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 id10078801
Published by NHTSA2016-08-19
Manufacturer's numberMC-15521
Manufacturer's date2016-04-26
NHTSA componentELECTRICAL SYSTEM:12V/24V/48V BATTERY; STRUCTURE:BODY:DOOR

NHTSA's summary

15521 – CUSTOMER ADVISORY LETTER. ON THESE VEHICLES, IF THE SIDE DOORS WILL NOT OPEN FROM INSIDE THE VEHICLE DUE TO LOW OR NO BATTERY VOLTAGE, SUCH AS A DISCHARGED OR DISCONNECTED BATTERY, OR IF THE VEHICLE IS ENTERED WITHOUT THE KEY FOB OR THE FOB IS NOT WORKING, CUSTOMERS ARE BEING ADVISED THAT THE DRIVER AND PASSENGER SIDE DOORS CAN STILL BE OPENED FROM INSIDE THE VEHICLE BY USING THE MANUAL RELEASE LEVERS LOCATED ON THE FLOOR BETWEEN THE SEATS AND THE DOOR OPENINGS. ALSO, IF THE VEHICLE'S SIDE DOORS WILL NOT OPEN FROM OUTSIDE THE VEHICLE DUE TO LOW OR NO BATTERY VOLTAGE, SUCH AS A DISCHARGED OR DISCONNECTED BATTERY, OR IF THE KEY FOB IS NOT WORKING, CUSTOMERS ARE BEING ADVISED THAT THE DRIVER SIDE DOOR CAN STILL BE OPENED BY USING THEIR KEY TO MANUALLY OPEN THE VEHICLE'S TRUNK AND PULLING THE MANUAL DOOR RELEASE TAB LOCATED IN THE TRUNK.

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

Body and frame, Electrical system, 12-volt battery

Vehicles listed
CADILLAC CTS2011, 2012, 2013, 2014
CADILLAC ELR2014, 2015, 2016
CADILLAC XLR2004, 2005, 2006, 2007, 2008, 2009
CHEVROLET CORVETTE2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016

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

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