4th Row the Right Way

[blown240]

I am going to do a 4th row in my 04 Yukon XL. Its 40% off day at the local yards on Monday, so I am going to go cut the rear floor out of another Yukon/Suburban/Tahoe.

My question is if all the 00-06 trucks have the same 3rd row mounting setup. Im pretty sure they do, but wanted to verify that there was no difference between a Tahoe vs Suburban etc.

MY plan is to cut the floor section with the 3rd row mounting points out of a donor truck and then weld, bolt, and seam seal it into my XL in the rear behind the 3rd row.

I have seen the 4th row done other ways, but I want it to look factory and it to be secure.

I'll post pics as I go...

 

[2011SSVHOE]

Sounds good, but it may be easier to buy a bus or a van LOL

good luck and keep us posted with pics!!!

 

[gat0r]

facing forward or back(like old station wagons)?

what are your plans for leg / head room? seems 1 or the other has possibility of being uncomfortable.

what about access to 4th row? facing back could make that easy

 

[blown240]

Im not sure if I will do frontwards or backwards. Im leaning towards forwards since, but I will have to play with the extra seat to see what works better. I have a feeling that forwards will have better leg room, but obviously backwards will give easier access.

It will only be small kids in the 4th row, so if they have to crawl over the 3rd, its probably no big deal. It will probably only be a couple times a year that I even use the 4th row, but I like the idea of it, and I can't leave any vehicle alone...

Do all 00-06 Suburban/Tahoe/Yukon have the same 3rd row mounts?

 

[MadDogDelpho]

I think they're slightly different. My Tahoe has 2 separate 3rd row seats, while in a burb it's a full row. But I'm not entirely certain, can anyone else confirm or correct? Sounds like a cool project though, subbed.

 

[YukonXL04]

Yea my XL has a single large 3rd bench. My friends Tahoe has 2 split benches for its 3rd row. And I can only image the floor mounts are different

 

[gat0r]

kiddos will luv having to crawl over seats to sit down
they'll look forward to car trips. hehehe

 

[iamdub]

I like this idea and, in theory, it sounds totally feasible to execute. Just make sure the seat's attachments/hinge points in the floor are secured in your XL the same way they were in the Tahoe/Yukon (if they bolt to the frame or a cross member through the floor, have extra layers of metal for reinforcement, etc.). Passenger safety measures are engineered into the design of the seating and that should be carried over. You don't want the seats peeling up in an accident.

 

[Tiki]

00-14 (never researched the K2 platform) have the same mounts which are threaded from the factory and use the same brackets.

 

[07Burb]

Well, this is an interesting idea. Anxious to see how this turns out

 

[Rocket Man]

Following. This should be interesting.

 

[select127]

tahoes and yukons have same mounting, all brackets are bolted to floor. suburban/yukon xl the front brackets are built into the floor. whichever you pull brackets from you will need seat from same truck.

 

[blown240]

Thanks for all the replies! I absolutely agree with safety first. Thats why I am getting a donor floor to work from, and not just rigging something up.

I have an extra 3rd row that I was going to put in my 61, but never did. How do I tell if its from a Tahoe or Suburban? I will get pics....

 

[blown240]

I just realized that I should take this extra seat I have and see if it will clip into my XL, then I know what I need.....

 

[Rocket Man]

There ya go.

 

[Tonyrodz]

Very interesting.

 

[ScottyBoy]

As far as the floor and seat mounts being the same, the longer SUVs (Burban, Yukon XL, Escalade ESV) all have the same third row seat mounts made into the floor. The Tahoes and Yukons have a slightly different setup, like someone mentioned they have mounts bolted to the floor and have a split bench instead of a solid third row seat like the Burban and Yukon XL has.
Personally, I would try and see if you could get a split third row seat from a Tahoe and get the mounts and see if you can fabricate something to get it mounted. The good thing about having the split seat is the fact that you can put just one side of the seat in if you want to. That would come in handy if you need just one more seat, but also still need a bit of cargo room to put groceries or something.

 

[blown240]

Scotty boy, I agree,but I already have 2 extra 3rd row benches. So I may as well get the mounts for a bench.

 

[inmypassatlife]

Seen this on YouTube and facebook groups. I got some shit because I said I'd be worried about kids sitting that close to possible shattering rear window in a collision. They said its the same as the 3rd row in a Tahoe, but all the videos and pics I saw the headrest actually rested on the rear window and thats a bit of an issue if the kiddos might be large enough to have their head reach the headrest. I dunno maybe I am being too cautious

 

[ezstriper]

it can be done, but it is not legal now, it is a fed offense to mod seat belt mounting which you will need to do for upper mounts. the tahoe and sub seats are different, the sub seat would be a easier mount as 1 piece, also I would not do rear facing due to making seat belts work in a accident