Lethal69GTO

For those who are following footsteps of @jonathanspw, I looked up the parts on GM Parts Giant specified in previous post with the PDF attachment for RPO 9L7. Parts can be sourced elsewhere, verify, use information at own risk. Relay (4 required, choose one of the following): 19116057, Relay Assembly, High Power, Multi-use, Gray, 12V, 35A, 4-Pin (GM PN 19116057) 13500114, Relay Assembly, High Power, Multi-use, Gray, 12V, 4-Pin (GM PN 13500114) Replaces: 12088567, 12135170, 12193606, 15328866, 15393412, 19115080, 19116057 Fuses: 19209790, Micro Blade, 5A, tan (2 required) (GM PN 19209790) 19209796, Micro Blade, 30A, green (4 required) (GM PN 19209796) NOTE: Simply adding these fuses and relays does NOT automatically infer the Upfitter AUX 1 through 4 switches will function. As documented throughout this thread, the vehicle must also have the underlying wiring in place - at a minimum between S48A X1 and X50A X3 and X4. Factory wiring also uses X61A X5 and X1. As documented in PDF attachment in previous post and the Upfitter Integration Bulletin 110N, the placement of the fuses in X50A controls the powering (battery or ignition) of the AUX switches, improper placement could damage the vehicle's wiring. Research and verify.

Congratulations! Definitely a successful endeavor.

Yup. Petty much what I purchased except outer jacket is not so thick. Appreciate the recommendation. Also a consideration I had just for the same reason. Good to know you successfully squeezed a 12AWG into it. Yup, thank you. I am familiar with it as it is where I passed my mobile HAM transceiver power circuit through. Forward thinking, when I pulled that power circuit through a small gauge wire was also pulled with it and left inserted through the pass-through. When I pull the four conductor cable for the Upfitter signal circuits using it I think will also leave a pull-wire, never know if it will be needed down the road. Awesome. Hope all goes well.

@jonathanspw Great job! Congrats on completing the upgrade. Great info find on the fuses as well. Bypassing X61A is the route I will be taking as well with the thought of using a multi-conductor cable from Automation Direct rather than running individual wires through the firewall. Still noodling that. The swapping out my factory DPN mirrors with after market mirrors having same features plus power folding and puddle lamp completed today so the Upfitter switches is next on the list.

Follow-up to my previous post. TinkeringFox has identified the terminals on Page 15 of this thread. I added some additional info. S48A-X2 (18-cavity connector) - AUX 1 through 4 button press trigger (signal) Cavity: 10-13 (10=AUX4, 11=AUX3, 12=AUX2, 13=AUX1) Mouser P/N: 306-SHCM-A03T-P025 JST Automotive, FEMALE 1.5MM, 22-20AWG - OR- Mouser P/N: 306-SHCM-A04T-P025 JST Automotive, FEMALE 1.5MM, 24AWG S48A-X1 (6-cavity connector) Mouser P/N: 571-5-962885-1 (see drawing in previous post) TE Connectivity, FEMALE, 24-22AWG X61A-X1 & -X5 - Relay Trigger (signal) Wire (for use on small male spades) X5 Cavity: 10=AUX1, 11=AUX3, 17=AUX2, 23=AUX4 X1 Cavity: 21=AUX1, 30=AUX3, 34=AUX2, 38=AUX4 Mouser P/N: 272-7116410002 YAZAKI, FEMALE 1.5mm, 20AWG X50A-X3 & -X4 - Upfitter Relay Trigger (signal) Wire (for use on small male spades) X3 Cavity: M5=AUX1, F3=AUX2 X4 Cavity: L6=AUX3, L1=AUX4 Mouser P/N: 272-7116410002 YAZAKI, FEMALE 1.5mm, 20AWG X50A-X3 & X4 - Upfitter Relay Output Voltage (for use on medium male spades) X3 Cavity: M7=AUX1 X4 Cavity: G2=AUX2, K5=AUX3, K2=AUX4 Mouser P/N: 272-7116411202 YAZAKI, FEMALE 2.8mm, 14AWG NOTE: User CAPTADAMJ posted excellent "how to" on page 22 of this thread. Be sure to review Upfitter Bulletin 110N (or newer) RPO 9L7 (LINKY HERE) pages 6 through 8 detailing the proper configuration of fuses in an X50A Under-hood Electrical Center (UEC) fitted to handle the usage of these switches. -Darryl

Absolutely frustrating for sure. I am going through this thread yet one more time. Digikey does have the information you seek, it is not so obvious to acquire as can be on Mouser Electronics. I had to select the 'EDA Models' hyperlink "5-928999-5 by SnapEDA" which brought me to SnapEDA web site. On it, I selected 'See Datasheet PDF" on the left side. I went to Mouser and searched using the same part number, 5-928999-5. LINKY HERE. Below is the datasheet. ENG_CD_929454_C26-2426561.pdf

GM Upfitter Integration Body Builder Manual, 2016 Silverado/Sierra, page 1199. "S48A Multifunction Switch - Instrument Panel X1" shows terminated lead as part number 13575782 (see attachment). Not sure if the size of the terminal is different than that of 13575783 you purchased. Service terminal part number is not provided. Picture of item shown on GM Parts Direct and the like appear to be the same for both part numbers and of course there is no additional helpful information. The 2015 Upfitter Manual page 698 shows the service terminal part number as 928999-5. I have no idea if this is the terminal found on the GM Multi-Purpose Wire Connector items. This terminal part number is not available individually from Mouser Electronics, as they state the terminal is obsolete. DigiKey Electronics site part number for this terminal is 5-928999-5 at $0.10 a piece LINKY HERE. I have not completed this mod yet nor did I purchase the GM wire connector items so am not able to offer more than the above.

<sigh> Hopefully. Maybe. In mean time, I think I'll throw the new X50A and see what kinda of illumination occurs on my cluster. Thanks for the response Mike. - Darryl

Mr. Fox, I am late to this modification and extend my appreciation for you, Mr. Gamboa and other contributors have made. Your old X50A looks similar to mine on 2015.5 GMC Sierra 1500 (P/N 23285566), I am curious if you encountered air bag reported faults as described here: GM MSB DRVR/PASS AIR BAG FAULT (service air bag message on startup and air bag warning light) when you installed the new X50A? Your old X50A and mine have 40A J-Case fuses in positions 5 (MSB DRVR) and 9 (MSB PASS) whereas your new one and mine (P/N 84303175) do not. Couldn't find much on MSB, but from the few links I did find MSB = Motorized Seat Belt. In the 2018 Upfitters Electrical Manual both positions marked "Not Used". I guess the worst thing is I can install and see if I get those same faults reported and take it from there.

Does anyone know what type of 2-pin connector used in the DPN outside rear view tow mirrors upper signal in-glass (red LED chevron) and fro whom/where it can be purchased? Is it a JST variety? Vehicle is a GMC 2015 Sierra SLE. I need to make a pigtail for an upgraded after-market mirror set I am adding the signal in-mirror glass to and don't want to chop up my original mirror wiring just for the connector shown in sttachment if I can prevent it.