# Service bulletin 18NA306 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. - Type: Service bulletin - NHTSA id: 10186065 - Published by NHTSA: 2021\-02\-01 - Manufacturer's number: 18NA306 - Manufacturer's date: 2020\-12\-23 - NHTSA component: EQUIPMENT ## NHTSA's summary This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre\-Repair Authorization \(PRA\). ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10186065-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10186065-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Equipment and accessories ## Vehicles listed - 2016 to 2019 BUICK CASCADA - 2011 to 2021 BUICK ENCLAVE - 2013 to 2021 BUICK ENCORE - 2020 to 2021 BUICK ENCORE GX - 2016 to 2021 BUICK ENVISION - 2011 to 2019 BUICK LACROSSE - 2011 BUICK LUCERNE - 2011 to 2020 BUICK REGAL - 2012 to 2017 BUICK VERANO - 2013 to 2019 CADILLAC ATS - 2020 to 2021 CADILLAC CT4 - 2020 to 2021 CADILLAC CT5 - 2016 to 2020 CADILLAC CT6 - 2011 to 2019 CADILLAC CTS - 2014 CADILLAC CTS\-V - 2011 CADILLAC DTS - 2014 to 2016 CADILLAC ELR - 2011 to 2020 CADILLAC ESCALADE - 2011 to 2016 CADILLAC ESCALADE ESV - 2017 to 2021 CADILLAC ESCALADE ESV - 2011 to 2013 CADILLAC ESCALADE EXT - 2021 CADILLAC ESCALADE NA - 2011 to 2016 CADILLAC SRX - 2011 CADILLAC STS - 2019 to 2021 CADILLAC XT4 - 2017 to 2021 CADILLAC XT5 - 2020 to 2021 CADILLAC XT6 - 2013 to 2019 CADILLAC XTS - 2011 to 2013 CHEVROLET AVALANCHE - 2011 to 2012 CHEVROLET AVEO - 2019 to 2021 CHEVROLET BLAZER - 2017 to 2021 CHEVROLET BOLT EV - 2011 to 2021 CHEVROLET CAMARO - 2011 to 2017 CHEVROLET CAPRICE - 2013 to 2015 CHEVROLET CAPTIVA - 2012 CHEVROLET CAPTIVA SPORT - 2014 to 2017 CHEVROLET CHEVEROLET SS - 2015 to 2016 CHEVROLET CITY EXPRESS - 2011 to 2012 CHEVROLET COLORADO - 2015 to 2021 CHEVROLET COLORADO - 2011 to 2021 CHEVROLET CORVETTE - 2011 to 2019 CHEVROLET CRUZE - 2011 to 2021 CHEVROLET EQUINOX - 2011 to 2021 CHEVROLET EXPRESS - 2011 CHEVROLET HHR - 2011 to 2020 CHEVROLET IMPALA - 2011 to 2021 CHEVROLET MALIBU - 2018 CHEVROLET N300 - 2017 CHEVROLET N300 MAX - 2011 to 2014 CHEVROLET SILVERADO 1500 - 2017 to 2021 CHEVROLET SILVERADO 1500 - 2011 to 2021 CHEVROLET SILVERADO 2500 - 2019 to 2020 CHEVROLET SILVERADO 4500 - 2012 to 2020 CHEVROLET SONIC - 2013 to 2015 CHEVROLET SPARK - 2018 to 2020 CHEVROLET SPARK - 2014 to 2017 CHEVROLET SPARK EV - 2011 to 2021 CHEVROLET SUBURBAN - 2011 to 2021 CHEVROLET TAHOE - 2013 to 2014 CHEVROLET TRAILBLAZER - 2017 to 2020 CHEVROLET TRAILBLAZER - 2021 CHEVROLET TRAILBLAZER - 2011 to 2021 CHEVROLET TRAVERSE - 2013 to 2021 CHEVROLET TRAX - 2011 to 2019 CHEVROLET VOLT - 2011 to 2021 GMC ACADIA - 2011 to 2012 GMC CANYON - 2015 to 2021 GMC CANYON - 2011 to 2021 GMC SAVANA - 2014 GMC SIERRA 1500 - 2019 to 2021 GMC SIERRA 1500 - 2011 to 2021 GMC SIERRA 2500 - 2011 to 2013 GMC SIERRA DENALI - 2015 to 2019 GMC SIERRA DENALI - 2011 to 2021 GMC TERRAIN - 2011 to 2021 GMC YUKON - 2011 to 2013 GMC YUKON DENALI - 2011 to 2013 GMC YUKON DENALI XL - 2011 GMC YUKON XL - 2012 to 2014 GMC YUKON XL - 2015 to 2021 GMC YUKON XL ## Recalls for the same vehicles and component - [2022160](/recalls/tc/2022160.md), 2022-03-31: Accessories - [21V497000](/recalls/nhtsa/21V497000.md), 2021-07-01: EQUIPMENT:OTHER:LABELS - [21V496000](/recalls/nhtsa/21V496000.md), 2021-07-01: EQUIPMENT:ELECTRICAL:ENGINE BLOCK HEATER - [2021365](/recalls/tc/2021365.md), 2021-06-10: Accessories - [21V440000](/recalls/nhtsa/21V440000.md), 2021-06-10: EQUIPMENT:MECHANICAL:ACCESSORY SCISSOR/SCREW/BOTTLE JACK/LIFT:STAND - [20V295000](/recalls/nhtsa/20V295000.md), 2020-05-21: EQUIPMENT:OTHER:LABELS; TIRES - [2020165](/recalls/tc/2020165.md), 2020-04-16: Accessories - [2019494](/recalls/tc/2019494.md), 2019-10-03: Accessories - [19V428000](/recalls/nhtsa/19V428000.md), 2019-06-11: EQUIPMENT - [2019205](/recalls/tc/2019205.md), 2019-04-26: Accessories ## Other bulletins for the same vehicles and component - [PI0572B](/bulletins/10254240.md), 2024-05-06, Service bulletin: EQUIPMENT. Information on COAX Repair Kit Availability. - [PI0488C](/bulletins/10254219.md), 2024-05-06, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; POWER TRAIN. Diagnostic Information for Transmission. - [PI0476A](/bulletins/10254216.md), 2024-05-06, Service bulletin: EQUIPMENT. Revised Installation Instructions for Accessory Windbreak. - [PI0408A](/bulletins/10254205.md), 2024-05-06, Service bulletin: TIRES; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Information on Tire Rotation Recommendations. - [23\-NA\-064](/bulletins/10254014.md), 2024-05-02, Service bulletin: ELECTRICAL SYSTEM; EQUIPMENT. This service bulletin provides information on the Transport Mode Feature, also known as Logistics mode, which is used to increase the 12V Battery stand time of the vehicle during transit and or long period of stand time at the dealerships. - [21\-NA\-249](/bulletins/10253789.md), 2024-05-01, Service bulletin: EQUIPMENT. This service bulletin provides repair information to correct a customer concern of the carpet appearance near the center console area. - [PI0718B](/bulletins/10253616.md), 2024-04-29, Service bulletin: EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Audio System Speaker Rattle, Buzz Noise, Poor Sound - [PI0693C](/bulletins/10253609.md), 2024-04-29, Service bulletin: EQUIPMENT:ELECTRICAL:INFOTAINMENT:BLUETOOTH/WIFI. Unable to Access MP3 Files on CD, Bluetooth Connectivity, No Audio After a Bluetooth CALL. - [PI0689B](/bulletins/10253606.md), 2024-04-29, Service bulletin: EQUIPMENT. Tool or Utility Box Sagging, Mis\-aligned. - [PI0688F](/bulletins/10253605.md), 2024-04-29, Service bulletin: EQUIPMENT:ELECTRICAL:INFOTAINMENT:BLUETOOTH/WIFI. Poor Voice Quality During Bluetooth Call or OnStar® Personal Call. 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