The muffler on a GMC Sierra is rather lucid and not bare arduous to repair. Most late mufflers are as well affordable. You should pocket money the muffler when it becomes rusted or full due to holes and other breaks.
Instructions
1. Verify you demand a distinct muffler on your GMC Sierra by looking under the Motor lorry In relation to the back location to scrutinize whether there are any copious or humble holes in the muffler or the muffler has fallen off partially or completely. Or, you may annex brick wall it needs a virgin muffler due to it's forming blatant grunting sounds or forging gunshot sounds.
2. Get a current or used muffler that corresponds to the year of your vehicle. It should annex a 2.25-inch inlet and Issue width, a 4-inch X 9.75-inch X 13-inch dispute and a 19-inch overall contingency length. It should too gain an offset-center invent.
3. Compass an aged blanket or a great group of cardboard on the ground under the rear stuff of the GMC Sierra. This Testament allow you to replace the muffler comfortably without lying on the actual ground. You can also place the truck on a car jack if desired. If you use jacks, make sure you properly secure the truck on the jacks.
4. Remove the old muffler. Completely loosen any bolts that are around the muffler and remove the muffler off. If the muffler is welded on, then you can break it away by knocking it with a sledge hammer. Dispose of the old muffler properly by breaking it down into small parts. Put the small parts in a trash bag.
Do not put it on too loosely or it may fall off.6. Start the engine and check the new muffler for any leaks or loud sounds. The bolts should not be too tight because the muffler needs to move slightly to prevent damage. Make sure you hang the muffler with the hangers that come with it. If it does not have the hangers, then you may need to purchase them separately.5. Replace the new muffler on your GMC Sierra. Line it up as straight as possible with the clamps and then tighten the bolts to hold it in place.
If there are leaks or loud sounds, then you may need to tighten the clamps tighter.
