Stock Exhaust Removal

ztsmith86 · June 9, 2014

This weekend I'm planning on installing my Gibson dual exhaust system on my 2014 GMC Sierra 1500 Crew Cab Short Bed All Terrain 5.3L. I wondering if I will actually have to cut my stock exhaust for installation? Has anyone done this?

newdude · June 9, 2014

Most cat back on these you just unbolt the factory stuff at the clamp.

TxTruckMan · June 9, 2014

I think he's asking if you have to cut the factory exhaust to pull it out from under the truck.

I've heard mixed reports. Some say it can be removed without cutting, some say no. I think your chances are better if you are able to jack the truck up a bit. The hard part will be getting it over the rear axle.

bigsapper · June 9, 2014

No cutting if you're using a lift. Otherwise, it depends on how high you can get the truck off the ground.

ztsmith86 · June 11, 2014

I'm asking it the factory exhaust is bolted together a the location where the new cat back exhaust is intended to bolt onto the factory exhaust? Thanks

TxTruckMan · June 11, 2014

Yes, there's a clamp after the third Cat before the muffler.

ztsmith86 · June 12, 2014

Does anyone have a photo of this?

TxTruckMan · June 12, 2014

http://www.silveradosierra.com/exhaust/installed-magnaflow-not-pleased-t82490-10.html

Toward the bottom of the page you can see the third cat and the clamp immediately behind it.

ztsmith86 · June 12, 2014

Can the stock exhaust be removed without any cutting once it has been disconnected from the 3rd Cat? I was planning on not even jacking the truck up to change the exhaust, but if someone has been through this before and could lend me some advice I would appreciate it. Thanks

SY2455 · June 13, 2014

Can the stock exhaust be removed without any cutting once it has been disconnected from the 3rd Cat? I was planning on not even jacking the truck up to change the exhaust, but if someone has been through this before and could lend me some advice I would appreciate it. Thanks

The answer is no. You must jack up the truck and use jackstands or cut the stock system. Unless you have a lift that you can use.

Fasthotrod · June 15, 2014

Agreed... I just put the stainless version of the Gibson exhaust on and I had to cut the factory exhaust. It's a pain to try and snake it out from between the rear axle and chassis. Without a lift, I'm going to say it's a no-go. (I tried ramps, jacks, stands... no dice.)

I cut mine right behind the muffler with a cut off wheel and a hacksaw. (My buddy had my sawzall.) Easy to remove after that.

Follow the instructions, and you should be okay. Don't tighten up anything until it says to in the instructions... snug is okay, but let it settle before you tighten everything up. Drivers side hanger is a POS, but workable.

Good luck!

Edited June 15, 2014 by Fasthotrod

fondupot · June 16, 2014

I have to remove my stock exhaust sometime this week to make room for my new Corsa Sport system. I really hope I am able to remove it all in one piece. Rather not hack the stock system up if I dont have too. I guess I will find out.

scott19677 · June 16, 2014

I just had mine removed by a muffler shop today and installed a 14 in. magnaflow. Came off in one piece.

Full Lock · June 16, 2014

I had to cut mine but it was on the ground. I dropped the spare tire but there still wasn't enough room for the front of the pipe to clear the cross member. Now with the rear axle at full droop, there might be enough room for the muffler to be pushed far enough to the rear for the front of the pipe to drop down and clear the cross member. That'll all make since once you're under there.

And also, I don't know if there's more room for a 5.3L exhaust due to the smaller pipe diameter.

Edited June 16, 2014 by Full Lock

xranger90 · June 17, 2014

I have to remove my stock exhaust sometime this week to make room for my new Corsa Sport system. I really hope I am able to remove it all in one piece. Rather not hack the stock system up if I dont have too. I guess I will find out.

Share some pics please.

This weekend I'm planning on installing my Gibson dual exhaust system on my 2014 GMC Sierra 1500 Crew Cab Short Bed All Terrain 5.3L. I wondering if I will actually have to cut my stock exhaust for installation? Has anyone done this?

I'm hearning more about Gibson exhaust and got interest on it. What exchaust exactly you got? I tried to look around and on this site looks the Extreme Dual is better among them: http://4wheelonline.com/Gibson_Exhaust_Systems.35014