Talk to a Sierra 1500 Sales Tech
1-888-706-1096
M-F 8:30A-11P, Sat-Sun 8:30A-9P
$20K Sweeps! 10 Chances to Win! Enter Daily >

Best Sellers

How to Install Gibson 3.5 in. / 2.5 in. Super Truck Aluminized Cat-Back Exhaust System - Middle Side

Installation Time

1 hours

Tools Required
  • 1/2", 9/16", 15mm wrenches & sockets
  • WD-40
  • hacksaw
  • jack stands

When installing this exhaust system make sure to use proper safety precautions. Use jack stands when working under the vehicle, set parking brake, block tires and use safety glasses and gloves. Allow exhaust to cool before attempting installation. Severe injury or burns could occur if safety measures are not taken.

1. Disconnect the negative battery cable before removal of OEM exhaust. This will allow the computer to reset and recognize the new exhaust. Lay out the exhaust on the floor so it looks like the drawing and compare parts with manual.


2. To remove stock exhaust, un-bolt it from the flange behind the Y-pipe. Make sure to leave all rubber grommets in the factory location. You will re-use stock clamp. For easier removal of exhaust, cut behind the muffler. Use WD-40 to remove hangers from


3 Next install head pipe # A onto your factory flange Re-use your factory nuts insert welded hanger into rubber grommets.


4. Slide the muffler assembly into the headpipe at least 1.5"-2". Use a jack stand to support the muffler assembly. Use clamp #E to secure muffler assembly to the headpipe. Do not tighten. Insert welded hangers into rubber grommets.


5. Rotate the muffler assembly until the outlets are level.


6. Install right and left stainless steel tips. Clamp down. When you have everything in place, firmly tighten all bolts and clamps down securely. Use stainless steel cleaner and a Scotch Brite pad weekly to prevent tip from discoloration. Inspect all fasteners after 25-50 miles of operation and re-tighten as necessary.

GIBSON EXHAUST systems are designed on a factory stock vehicle
Any aftermarket products installed could increase the sound levels of the exhaust.
Make sure there is a 1” clearance from ALL rubber brake lines, shock boots, lines, tires, etc. to prevent heat related damage or fire.

Best Sellers