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adding oem skid plates to regular 4x4 silverado 1500

jwester34
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ajdata Enthusiast

ajdata

Posted
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These are GM bolts that are tapered a bit. They use them on a lot of attachments to the frame without having to tap the holes. The tapered tip allows the threads to bite when you start turning it in. These bolts are 10mm x 1.5 thread. You can use regular bolts if you tap the holes with a tap and die set.

 

The GM part number for these bolts is 11518341. They are listed as M10x1.5x25. Retail for 4 is $37.40 with tax.

Good to know thanks for sharing the info. Learn something new everyday. Is this why these bolts were harder to crank down than I expected?

 

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DanY
DanY

My High Country 4x4 came with the front skid plate, if you can call it that. It is just a plastic shield from the radiator support to the front cross member. I think the brackets listed in your part

amxguy1970
amxguy1970

Is this the kit you are talking about?   http://www.ebay.com/itm/GM-23176881-Underbody-Skid-Shield-2015-Tahoe-Silverado-Sierra-Genuine-OEM-GM-/231389136771   That actually has some metal protecti

tnchevy
tnchevy

Now when did they come out with this and better yet why don't the Z71 trucks come with them from factory? I know several of us have discussed wanting/wishing GM would have put the metal skid plates a

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DanY Enthusiast

DanY

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Posted

Good to know thanks for sharing the info. Learn something new everyday. Is this why these bolts were harder to crank down than I expected?

Sent from my Nexus 6P using Tapatalk

Yep. That's why I run the bolt in before the install to tap the holes. They are a bit tough cranking them in, also tend to get a bit warm from the friction. Assembly line uses power tools to drive them.

tnchevy Senior Enthusiast

tnchevy

Posted
Posted

I am learning some new stuff here as well. What do you mean by "run them in"? Also thanks for setting my mind at ease about the 2 places for the self tapping screws. Even if there isn't a dimple there I should still be able to get them in there with the help of a drill. I greased the only two zerks on the truck yesterday and checked my front/rear diff and transfer case fluids. While I was under there I checked out the transfer skid plate a little closer and it is actually very sturdy and a thicker piece of metal than I thought. Should give plenty of protection for mild off roading.

jrob56 Enthusiast

jrob56

Posted
Posted

I am learning some new stuff here as well. What do you mean by "run them in"? Also thanks for setting my mind at ease about the 2 places for the self tapping screws. Even if there isn't a dimple there I should still be able to get them in there with the help of a drill. I greased the only two zerks on the truck yesterday and checked my front/rear diff and transfer case fluids. While I was under there I checked out the transfer skid plate a little closer and it is actually very sturdy and a thicker piece of metal than I thought. Should give plenty of protection for mild off roading.

 

By "run them in" he is referring to putting the self tapping bolts in before installing the shield. Helps to start it straight, dont have to fiddle with shield and can see what your doing better. Then remove that self tap screw put your plate on and put the screw in again for the actual install.

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tnchevy Senior Enthusiast

tnchevy

Posted
Posted

 

By "run them in" he is referring to putting the self tapping bolts in before installing the shield. Helps to start it straight, dont have to fiddle with shield and can see what your doing better. Then remove that self tap screw put your plate on and put the screw in again for the actual install.

Thanks for the education! I will definitely do that when I go to put mine on. Looks like it will be a few weeks before it gets here.

ajdata Enthusiast

ajdata

Posted
Posted

I am learning some new stuff here as well. What do you mean by "run them in"? Also thanks for setting my mind at ease about the 2 places for the self tapping screws. Even if there isn't a dimple there I should still be able to get them in there with the help of a drill. I greased the only two zerks on the truck yesterday and checked my front/rear diff and transfer case fluids. While I was under there I checked out the transfer skid plate a little closer and it is actually very sturdy and a thicker piece of metal than I thought. Should give plenty of protection for mild off roading.

I ran them in with my impact gun. And then tightened with socket wrench.

 

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jrob56 Enthusiast

jrob56

Posted
Posted

Looks so much better, cant believe Z71 didnt get these as part of the package.

SMiller Senior Enthusiast

SMiller

Posted
Posted (edited)

Who is going to be the first to have these powder coated black?

 

Someone mirror polish them...

Edited by SMiller
  • 3 weeks later...
xelli Enthusiast

xelli

Posted
Posted

Installed at the dealer today

Part number 23176881

No other parts on the work order and a 1/2 hour labor charge.

  • 2 weeks later...
Gofas Enthusiast

Gofas

Posted
Posted

eBay purchased GM skid plate package installed.

All 5 a Perfect fit. My Chevy dealer installed them while my truck was in for the door chime fix.

redwngr Senior Enthusiast

redwngr

Posted
Posted

What is a self tapping bolt? When I hear that I think of a bolt with a sharp point designed to penetrate an area that did not already have a hole.

 

Sent from my Nexus 6P using Tapatalk

They will thread an extruded hole (like the one DanY) described, but don't have the drill point that a self drill/tap screw has.

 

http://www.rblockers.com/republic-storage-screw-self-treading-8-32-x-5-16.html?gclid=Cj0KEQiArJe1BRDe_uz1uu-QjvYBEiQACUj6oszPFVorE1HVswJKA6fZf0ICse4nO8H9uFk2IvrwGucaAmZE8P8HAQ

 

http://www.zoro.com/caddy-screw-self-tapping-12-in-pk100-sms8/i/G2844947/?gclid=Cj0KEQiArJe1BRDe_uz1uu-QjvYBEiQACUj6oqi_7JPuxluVNai7meMG0clPslFxEWiKE-yo31QLHcgaAusg8P8HAQ&gclsrc=aw.ds

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