Adding factory options aftermarket on '21 Sierra

Nicholas Jones · December 9, 2020

Hey all, Just picked up a '21 Sierra Elevation with the 3.0, that was pretty basic on options, has x31 and parking assist.

Is there anyway to add on some of the "factory" options aftermarket, suck as bed outlet, dash outlet, factory trailer brake, etc. or am I just SOL,

Thanks for any insight.

topgear1224 · December 9, 2020

Trailer brake, no

Bed outlet MAYBE do you have the 110 in the dash?

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Nicholas Jones · December 9, 2020

I do not have the 110 in the dash either, my '15 Silverado did and we used it often. I assume that would be some type of wiring harness etc.

topgear1224 · December 9, 2020

You can add an aftermarket trailer brake controller but it's going to be inertia based, the factory one is integrated into the e-boost system.

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newdude · December 9, 2020

1 hour ago, Nicholas Jones said:

Hey all, Just picked up a '21 Sierra Elevation with the 3.0, that was pretty basic on options, has x31 and parking assist.

Is there anyway to add on some of the "factory" options aftermarket, suck as bed outlet, dash outlet, factory trailer brake, etc. or am I just SOL,

Thanks for any insight.

Big no on the trailer brake.

110v/230v is a problem too. The truck's body harness is different with or without the outlets option. $700-800 just for the body harness, $200-300 for the inverter and $450 for the instrument panel wiring harness. All with no guarantee that it will function or if you have to swap fuse blocks as well.

lapoolboy · December 9, 2020

I have heard (and read) several times that you can have factory add-on options after the sale indicated on the VIN/build sheet. I've asked several dealers about adding my GM intake and exhaust to the RPO list for my VIN but they all look at me like I have three heads. Has anyone been successful at getting this done?

Rob Mugs · December 9, 2020

2 minutes ago, lapoolboy said:

I have heard (and read) several times that you can have factory add-on options after the sale indicated on the VIN/build sheet. I've asked several dealers about adding my GM intake and exhaust to the RPO list for my VIN but they all look at me like I have three heads. Has anyone been successful at getting this done?

GM intake and exhaust are accessories. You can't add them to the build sheet.

lapoolboy · December 9, 2020

1 minute ago, Rob Mugs said:

GM intake and exhaust are accessories. You can't add them to the build sheet.

Ah, makes perfect sense. Thanks. Seems I was given bad intel.

newdude · December 9, 2020

1 hour ago, lapoolboy said:

I have heard (and read) several times that you can have factory add-on options after the sale indicated on the VIN/build sheet. I've asked several dealers about adding my GM intake and exhaust to the RPO list for my VIN but they all look at me like I have three heads. Has anyone been successful at getting this done?

See below.

1 hour ago, Rob Mugs said:

GM intake and exhaust are accessories. You can't add them to the build sheet.

Yes and no. See below.

After the sale they do get reported to GM's system when installed by the dealer and are documented as installed, but they don't get added to the build sheet. So if the dealer installed flaps, tonneau, boards, etc. I can run the VIN if it was in for repair and see what was done to it.

On the other hand when ordering a car/truck, LPO accessories. "Limited Production Options". If you see anything on the window sticker from GM that says "dealer installed" like mud flaps, running boards, tonneaus, etc. they were ordered by the dealer when they submitted the order for the truck. They are installed at the dealership when the truck arrives and they all have an associated RPO code that gets placed on the build.

So for example on the intake and exhaust, if you order the power pack on a Colorado, they come to the dealer as an LPO, the VIN will have 4 RPO codes to identify. One for the power pack as a whole (RPO code PDG), and then the exhaust (RPO code WBC) and the intake (5W7) and YM8 identifying LPOs present on the vehicle. The intake can be ordered on its own as an LPO as well so it would have "5W7" and "YM8" on the build.

Here is an example of the window sticker with LPOs on it from a Camaro:

So if you follow the columns, "Black Fuel Door w/Exposed Carbon Fiber" has underneath it (top of the next column) "Dealer Installed". If I pull the build for this Camaro, it will show RPO code YM8 LPO identifier and then have RPO code VQL for the fuel door. If I had a Camaro and went to the dealer and ordered this same fuel door and installed it myself while in bumper to bumper, it does not get documented on the VIN history with GM, and I only get the 12 month part warranty. If I bought a Camaro and had the door installed by the dealer a 5 miles, I get it documented installed and then the part is warrantied for the 3/36 bumper to bumper period instead of 12 months.

Rob Mugs · December 10, 2020

3 hours ago, newdude said:

See below.

Yes and no. See below.

After the sale they do get reported to GM's system when installed by the dealer and are documented as installed, but they don't get added to the build sheet. So if the dealer installed flaps, tonneau, boards, etc. I can run the VIN if it was in for repair and see what was done to it.

On the other hand when ordering a car/truck, LPO accessories. "Limited Production Options". If you see anything on the window sticker from GM that says "dealer installed" like mud flaps, running boards, tonneaus, etc. they were ordered by the dealer when they submitted the order for the truck. They are installed at the dealership when the truck arrives and they all have an associated RPO code that gets placed on the build.

So for example on the intake and exhaust, if you order the power pack on a Colorado, they come to the dealer as an LPO, the VIN will have 4 RPO codes to identify. One for the power pack as a whole (RPO code PDG), and then the exhaust (RPO code WBC) and the intake (5W7) and YM8 identifying LPOs present on the vehicle. The intake can be ordered on its own as an LPO as well so it would have "5W7" and "YM8" on the build.

Here is an example of the window sticker with LPOs on it from a Camaro:

So if you follow the columns, "Black Fuel Door w/Exposed Carbon Fiber" has underneath it (top of the next column) "Dealer Installed". If I pull the build for this Camaro, it will show RPO code YM8 LPO identifier and then have RPO code VQL for the fuel door. If I had a Camaro and went to the dealer and ordered this same fuel door and installed it myself while in bumper to bumper, it does not get documented on the VIN history with GM, and I only get the 12 month part warranty. If I bought a Camaro and had the door installed by the dealer a 5 miles, I get it documented installed and then the part is warrantied for the 3/36 bumper to bumper period instead of 12 months.

I stand corrected. I'm not usually wrong but often am

Imcrazy · December 10, 2020

I’d say you’re sol on the factory power and the trailer brakes. Hopkins makes a nice controller with a separate control and monitor so you can mount the slider in the same place as the factor one would be at least.

https://www.reesehitches.com/products/47297?gclid=CjwKCAiAiML-BRAAEiwAuWVggjjCw7wrAJH3_Cv1wL8wsQo3v7VVmBi5YgJlGlHPKlVTSREhX-mbnxoCUPYQAvD_BwE

Used that one in my 2016 and liked it.

You can buy an inverter for the power, maybe mount it in the center console.

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Tchiz33 · December 20, 2020

On 12/9/2020 at 12:27 PM, Nicholas Jones said:

Hey all, Just picked up a '21 Sierra Elevation with the 3.0, that was pretty basic on options, has x31 and parking assist.

Is there anyway to add on some of the "factory" options aftermarket, suck as bed outlet, dash outlet, factory trailer brake, etc. or am I just SOL,

Thanks for any insight.

I just ordered the parts for this Rear View Camera mod. It's an upgrade that wasn't available on my '21 Silverado LT but apparently is relatively easy to install. Here is the post