Need "Multifunction Switch Instrument Panel" Diagram

colton_m · June 13, 2014

The circuit board pictured above plugs into a wire that runs to the fuse box. If using the "4 upfitter switches" you would simply pull out your current "multifunction switch instument panel" as a complete unit and replace with the "upfitter" one. Then your lights or anything for that matter would run off the 4 upfitter relays in the fuse box. My problem is I dont want to use the four upfitter switches they sell as a complete unit.

I still want my adjustable peadals, TC off, dome light, park assist off and Hill descent control bottons but ideally add two AUX switches in between because the toggle assembly will hold seven toggles in total if they are all the thin bottons. The problem seems to be I can only buy one or the other, not combine things togeather like I am describing.

More pictures coming.

2014MallCrawler · June 13, 2014

Major popcorn. All i have is traction control, cargo, adjustable pedals and park sensors. So id have 2 or 3 open spots!!

beard_up · June 14, 2014

Well, I don't want to hijack your thread, but, I took a look under my fuse box cover and lo and behold I have the spots for fuses for upfitter switches, but I couldn't seem to find a spot for the relays.

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beard_up · June 14, 2014

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Terrible pics for those interested.

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Brews02ws6 · June 14, 2014

Sorry to be ignorant here, but what does this mean? You just need to put fuses in and replace the panel with the one that has the switches? Or is it a lot more complicated?

colton_m · June 14, 2014

Sorry to be ignorant here, but what does this mean? You just need to put fuses in and replace the panel with the one that has the switches? Or is it a lot more complicated?

Need to put in fuses and relays, not too big of a deal. The problem (in my case) is that I want to add two AUX switches in with my existing 5 already in the truck. It appears you can only order the four AUX (upfitter) switches as a complete unit, not add them in with what you already have. In my truck that is a problem because its an LTZ with a boat load of options already controlled from that switch bank. It's almost like GM assumes you'd only want upfitter switches in a work or lower trim level truck where only two of the toggles are already in use.

Edited June 14, 2014 by colton_m

tbarn · June 14, 2014

First the bad news, then the other bad news. I checked on my truck ( double cab LT 5.3). The underhood fuse block cover shows location for upfitter relays and fuses. the catch is that there are no terminals at those locations. So long story short, you can't install the factory switch and have it work.

2014MallCrawler · June 16, 2014

Why couldn't you hard wire those switches to work relays like any other switch?

beard_up · June 16, 2014

Why couldn't you hard wire those switches to work relays like any other switch?

This. I have no electrical experience but couldn't you just wire the switches up?

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tbarn · June 16, 2014

Yes you could hard wire then yourself to turn relays on. Wiring the switches directly won't work because they won't carry any amount of useable current.

colton_m · June 17, 2014

First the bad news, then the other bad news. I checked on my truck ( double cab LT 5.3). The underhood fuse block cover shows location for upfitter relays and fuses. the catch is that there are no terminals at those locations. So long story short, you can't install the factory switch and have it work.

Just checked this, turns out I am also screwed (crew cab LTZ 6.2) Found the location no problem but no terminals...

I'm thinking I might go a different route to get this done. I found the VIN for a 2015 HD Duramax, this dealer also had good pics of the interior and the switches in that truck are like this:

1. Adjustable Pedals

2. Traction Control Off

3. Box LED lights

4. Park Assist Off

5. Lane Departure Warning

6. Hill Descent Control

7. Exhaust Brake

Since my 2014 truck has all of these options except Lane Departure Warning and an Exhaust Brake I am thinking I could search the part number using that trucks VIN and order its switch bank. It would control all my current options but I could use the signal wires from the LDW and Exhaust Brake to activate the relays that are already on my light bar and backup lights. Getting really fancy it stands to reason you could buy both the switch bank from that 2015 truck and the "upfitter" switches. Then it would be possible to replace the plastic toggles with the LDW and Brake symbols with AUX1 and AUX2 from the upfitter package. Otherwise pressing LDW or Exhaust Brake would turn on lights... seems kind of stupid to me, but it's begining to look like the only way to get exactly what I want. Need to order all these different things and frankenstein them togeather lol.

Taking it to another extreme I suppose I could also order the fuse panel from that 2015 truck because it should have the terminals for the upfitter relays... Along with everything else since it's fully loaded. Now we are probobly getting expencive!

Edited June 17, 2014 by colton_m

beard_up · June 19, 2014

Just bumping to see what's going on

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colton_m · June 20, 2014

I was able to get a part number for the switches out of a 2015 that has seven toggles. I am going to order those and the "upfitter switches". I was also able to remove the individual switches and chrome seperator bits out of my current switch bank, it took a lot of effort but it is possible haha. So long story short I am going to steal the AUX1 and AUX2 toggles out of the upfitter unit and pop them into the unit from the 2015 in the Lane Departure and Exhaust Brake locations and then wire my light relays off of there. I'll get some pics up as soon as possible but I probobly wont have time until mid July. Apparently the switches are at least 10-12 business days away.

For anyone interested I did some research and there are 30 unique switch banks you can order, here's the list with the detais I know for certain:

23145157
23145158 (TC / Dome Light / Blank / AUX1 / AUX2 / AUX3 / AUX4)
23145161
23145162 (Pedals / TC / Dome Light / Park Assist / HDC)
23145163
23145169
23145170
23145171
23145172
23145183
23145184
23145185
23145186
23145190
23145191
23145193
23145195
23145196
23145197
23145198
23145199
23145200
23145202 (Pedals / TC / Dome Light / Park Assist / LDW / HDC / Exhaust Brake)
23145209
23145212
23145213
23145214
23145215
23145216
23145217