TSB on this https://static.nhtsa.gov/odi/tsbs/2017/MC-10126990-9999.pdf Bulletin No.: PIT5314BPublished date: 12/21/2017Preliminary InstructionsFollow the recommendations listed below based on the model year of the vehicle.2016-2018 model years Perform the following recommendations based on vehicle configuration: 1. For vehicles built WITH Under Rail Bed Lighting Option:Trucks equipped with the under rail bed lighting option will already have the female side of the X400 connector. Obtain an appropriatelength of 18 ga wire to run from the X400 connector up to t
Thanks for posting. Bulletin only includes the 2016-2017 model years but I've seen quite a few 14-15s in this thread. Are these owners SOL with the warranty on these vehicles? No mention of the 2018 - 2019 (classic) either. I wonder if these got different fuel injectors not to be included also.
This is your friend: https://www.gmupfitter.com/files/media/photo/664/Sierra_Silverado_Electrical_Body_Builders_Manual_Service_Manual_2016_en_US.pdf Looking at the schematic it would seem that the previous owner somewhere disconnected the puddle lamp circuit and jumped the puddle lamps to the headlight circuit. Pin # 8 would insert right next to Pin # 9 (Yellow Wire) and next to pin # 7 which is unoccupied. Technically your puddle lamps should not work at all with that wire disconnected.
Same here with my 2018. I just went to Ebay and bought one. Lots of really nice ones that won't break the bank https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313.TR2.TRC1.A0.H0.Xchevrolet+owners+manual+case.TRS0&_nkw=chevrolet+owners+manual+case&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=gm+owners+manual+case&LH_TitleDesc=0
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