Pulled the driver seat to replace cushion. Question about the E Torx bolts

[sparkvark]

My 2001 Yukon needed to have the driver seat cushion replaced as you can imagine. With 412,000 miles it was a little flat. I got the seat out but one bolt gave me a hard time. The rear outboard 14 E Torx bolt didn't want to come out. I had to put a breaker bar and plenty of oil to get it out. The bottom threads must have been rusty since they go through the bottom of the floorboard. The threads are a little messed up on the bolt. The threads in the floor look ok but I am sure they could use some repair. Does anyone know what size they are and the correct chase to use? Or should I see if the dealer has replacement bolts and use a new one to chase the threads. Thanks in advance.

 

[Doubeleive]

My 2001 Yukon needed to have the driver seat cushion replaced as you can imagine. With 412,000 miles it was a little flat. I got the seat out but one bolt gave me a hard time. The rear outboard 14 E Torx bolt didn't want to come out. I had to put a breaker bar and plenty of oil to get it out. The bottom threads must have been rusty since they go through the bottom of the floorboard. The threads are a little messed up on the bolt. The threads in the floor look ok but I am sure they could use some repair. Does anyone know what size they are and the correct chase to use? Or should I see if the dealer has replacement bolts and use a new one to chase the threads. Thanks in advance.

https://www.ebay.com/itm/00-14-SILV...703059?hash=item1f002974d3:g:l~MAAOSwkmZdWwfe

 

[sparkvark]

https://www.ebay.com/itm/00-14-SILV...703059?hash=item1f002974d3:g:l~MAAOSwkmZdWwfe

Ouch! Those look worse than mine!!.

I called the local GM dealership. The bolts are a discontinued item but they were nice enough to give me the size. M12 1.75x45. It didn't list fine or coarse threads but I am sure I can find something to replace it with. I wonder what bolt strength these are. The dealer parts department didn't know that either.

I appreciate the listing.

 

[Doubeleive]

There are others on eBay in better condition that was just the first one that popped up

 

[OR VietVet]

A 12mm tap with the same thread count and pitch should be easy to run down there and clean it up and the same for the chase of the threads.

 

[sparkvark]

There are others on eBay in better condition that was just the first one that popped up

Thanks. I'll do a more in depth search.

 

[sparkvark]

A 12mm tap with the same thread count and pitch should be easy to run down there and clean it up and the same for the chase of the threads.

I was wondering if I could do that. A chase will be hard to find in my area but a tap is easy enough to get. I will get one and gently try it.

 

[OR VietVet]

May be able to rent them or us for free from a parts store.

 

[sparkvark]

May be able to rent them or us for free from a parts store.

Great idea. I had not thought about that. I just checked and our local Autozone has a thread chase set for loan. I will get it tomorrow. I will report back here with pictures good or bad in the next few days with my rebuilt seat installed.

 

[Fless]

Ouch! Those look worse than mine!!.

I called the local GM dealership. The bolts are a discontinued item but they were nice enough to give me the size. M12 1.75x45. It didn't list fine or coarse threads but I am sure I can find something to replace it with. I wonder what bolt strength these are. The dealer parts department didn't know that either.

I appreciate the listing.

The 1.75mm value in the bolt spec is the thread pitch. Besides the 12mm size, that's what you need to know to get the right tap/chaser.

 

[iamdub]

Ouch! Those look worse than mine!!.

I called the local GM dealership. The bolts are a discontinued item but they were nice enough to give me the size. M12 1.75x45. It didn't list fine or coarse threads but I am sure I can find something to replace it with. I wonder what bolt strength these are. The dealer parts department didn't know that either.

I appreciate the listing.

Pretty sure they're grade 10.9. I'd replace it with a standard hex head bolt with some anti-sieze in the threads and paint the end that protrudes under the vehicle. You'll probably never be removing them again, but just in case and while you're there...

 

[sparkvark]

Thanks to everyone with their helpful tips. The job is complete and I am very happy with the results. Here are the pictures

 

[sparkvark]

Seat rebuilt

 

[sparkvark]

Repair of the seat frame cracks I found

 

[sparkvark]

Install the new cushion and springs

 

[sparkvark]

Put it back together. What I ended up doing was reusing one of the original bolts. I ran a chase through the rusted threads in the floor. The other side got a new bolt.

 

[OR VietVet]

Damn, that is some nice work there. Very nice detail and pics.

 

[sparkvark]

Damn, that is some nice work there. Very nice detail and pics.

Thanks. It might help someone who has been thinking about doing this. It sits like a new car now.

 

[Joseph Garcia]

Excellent work and documentation! You have added to our collective knowledge base. Thank you!!

 

[S33k3r]

Wow! I have a Suburban that needs this so bad and I have been so chicken to do it, LOL. I kind of want to see if I can find superior foam for the seat, though, but it just may be that the foam I have is so old that OEM foam will be just fine. Currently, if you sit in the seat for any length of time, your backside starts to hurt.