Auxiliary Switches

Installation Of Upfitter Auxiliary Switches (RPO 9L7) – 2014-2019 Chevrolet Silverado & GMC Sierra

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2017 Chevrolet Silverado

NHTSA ID Number: 10147377 Manufacturer Communication Number: PIT5298C   Summary This Preliminary Information communication provides information to the technician on installing Regular Production Option Code 9L7 Up-fitter Auxiliary Switches. Technician will need to reference the latest version of General Motors Up-fitter Integration Bulletin 110. The information can be found at https://www.gmupfitter.com/ under the “Technical Bulletin” Tab and … Read more

Auxiliary Switches are Inoperative – 2015-2016 Chevrolet Silverado & GMC Sierra

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2016 Chevrolet Silverado

NHTSA ID Number: 10089968 Manufacturer Communication Number: 15411 Summary 15411 – SERVICE UPDATE. THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO INSTALL FUSES AND RELAYS AS REQUIRED IN THE UNDERHOOD ELECTRICAL CENTER (UEC) ON CERTAIN 2015 MODEL YEAR CHEVROLET SILVERADO AND GMC SIERRA VEHICLES EQUIPPED WITH AN ACCESSORY-WIRING-JUNCTION-BLOCK (RPO 9L7). THESE VEHICLES MAY HAVE MISSING FUSES AND RELAYS. … Read more