Anyone get the 9L7 Upfitter AUX switches

gemarsh · February 28, 2021

2 hours ago, David Withrow said:

Installed mine today. Hooked up air compressor for air bags.

Looks like a good days work you put into your truck!

After you have looked at both lower panels, do you think a person would be able to cut the switch mounting hole out of the existing panel and the switches would clip in?

David Withrow · March 6, 2021

Yes you can. I would trace it out and cut it small then trim bigger if needed.

BlueDMax · March 13, 2021

Just want to let you guys know that originalgmautoparts.com has 84942073. They operate out of Vic Canever Chevrolet in Fenton, MI. $150 including tax for the whole kit. I live local so I went and picked it up this morning to save the shipping cost. I asked them how they got it because so many of us are having issues finding it. He said it was not an issue at all. Parts were on site in 3 days. Told him I was putting his info on this forum and to expect some orders.

Descartian · March 13, 2021

4 hours ago, BlueDMax said:

Just want to let you guys know that originalgmautoparts.com has 84942073. They operate out of Vic Canever Chevrolet in Fenton, MI. $150 including tax for the whole kit. I live local so I went and picked it up this morning to save the shipping cost. I asked them how they got it because so many of us are having issues finding it. He said it was not an issue at all. Parts were on site in 3 days. Told him I was putting his info on this forum and to expect some orders.

I went ahead a d picked up a set. They get you on shipping, over $50 to Houston TX.

BlueDMax · March 13, 2021

I went ahead a d picked up a set. They get you on shipping, over $50 to Houston TX.

OUCH on the shipping.

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Transient · March 14, 2021

That's still a deal compared to buying each piece separately.

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Descartian · March 24, 2021

On 3/13/2021 at 10:55 PM, Transient said:

That's still a deal compared to buying each piece separately.

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Holy crap! I was just expecting the switches and wiring but it arrived with a complete new interior panel for under the dash/steering wheel with the switch panel cut out. This has to be one of the cheapest GM parts I’ve ordered in years. Great but for $200 shipped.

BlueDMax · March 24, 2021

Holy crap! I was just expecting the switches and wiring but it arrived with a complete new interior panel for under the dash/steering wheel with the switch panel cut out. This has to be one of the cheapest GM parts I’ve ordered in years. Great but for $200 shipped.

Yeah man! I still can’t decide what I want to wire to them.

Thinking footwell lights on one
Light bar/pods on another
Rear bumper lights on the third

Then?

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FiremanGregg · April 12, 2021

On 3/20/2020 at 2:29 AM, Jbert93 said:

What is the purpose of part number 84688686. When I look it up on gm parts it appears to be the switch for the parking assist and lane departure. Also, I noticed a comment about the 4th and 5th Aux switches being unusable because they are dedicated elsewhere. Can anyone confirm?

So all these part numbers you listed there, do I need to purchase all those pieces for the auxillary switches to work? I am heading to the dealer today to sign for my new truck and would like to just order them right away.

Rick2021GMC · April 12, 2021

Great thread everybody, I have read it from beginning to end and think I finally have a good understanding of what's in front of me.

I only have one question. I have not read where anyone did this on a 2021 3500HD DRW Denali with keyless start.

Anybody have any insight for me that makes this different than the 1500 or 2500 install for keyless starts?

Again thanks for everyone who took the time to detail this out. Great job.

Transient · April 13, 2021

Great thread everybody, I have read it from beginning to end and think I finally have a good understanding of what's in front of me.

I only have one question. I have not read where anyone did this on a 2021 3500HD DRW Denali with keyless start.
Anybody have any insight for me that makes this different than the 1500 or 2500 install for keyless starts?

Again thanks for everyone who took the time to detail this out. Great job.

It's the same as a 2500. Just make sure you get the correct kit/knee bolster.

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Dan Pemberton · April 24, 2021

Here is the parts list everything I needed to add the up fitter kit to my 2020 Trail Boss LT Black interior

Knee Bolster - GM 84487354 (Black)

Multi Switch - GM 84688687 (Black)

Fusebox – GM 84497098
F Block Kit(terminal) - GM 84669070

Battery Cable - GM 84524205

dudleyfj40 · June 29, 2021

On 7/29/2020 at 7:25 PM, AdamAT4 said:

Got mine, but im thinking my battery harness is missing the cover for the connector

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What did you end up figuring out for the connector cover?

gemarsh · June 30, 2021

4 hours ago, dudleyfj40 said:

What did you end up figuring out for the connector cover?

It should be in the bag. You need to put it thru the firewall first, then install the connector over the crimped end.

dudleyfj40 · June 30, 2021

I got this from a guy who got it from a guy. I looked everywhere, can't find it. It must have got lost in the shuffle. Looking for part numbers for the piece now. Thanks!