Gibson 65626 User manual

Installation Instructions
Cat-Back Stainless Dual Sport Exhaust
Chevy Silverado / GMC Sierra 1500 Truck
2007 Crew Cab, Short Bed, 4.8L-5.3L-6.0L 2/4wd
2007 Extended Cab, Standard Bed, 4.8L-5.3L 2/4wd
* Designed specifically for vehicles equipped with Active Fuel Management *
Part #65626
ITEM PART QUANTITY DESCRIPTION
A 1135-700895S 1 3" Stainless Headpipe with welded Flange
B 11235S 1 Stainless Superflow CFT Muffler
C 1227-700984S 1 2.25" Stainless Passenger Side Over Axle Tailpipe
D 1228-700985S 1 2.25" Stainless Driver Side Over Axle Tailpipe
E 500395 2 3.5" Stainless Tip
F OHD300 1 3" Clamp
G 5756 2 2.25" Clamp
H BO-906 1 Bolt kit for Tailpipe
Thank you for purchasing our Gibson Exhaust System for your vehicle.
If you need further assistance, please do not hesitate to call our technical department at
(800) 528 -3044 Monday through Friday, 8am to 5 pm. 0807

Installation Instructions #65626
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.
SUGGESTED TOOLS: 1/2", 9/16", 15mm wrenches & sockets, WD-40, hacksaw, jack stands
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,
unbolt it at the flange behind
the Y-pipe. Make sure to leave
all rubber grommets in the
factory location. You will re-
use stock nuts and bolts.
For easier removal of exhaust,
cut behind the muffler. Use
WD-40 to remove hangers
from grommets.
3. Bolt headpipe #A to the
stock flange re-using the
factory nuts and bolts. Insert
welded hanger into rubber
grommet. Do not tighten.
4. Install muffler #B with inlet
towards Y-pipe. Use jack
stands to support the muffler.
Use clamp #F to secure the
muffler to headpipe. Do not
tighten.
5. Make sure muffler outlets
are level before installing
tailpipes. Now install passenger
tailpipe #C. Insert welded
hangers into rubber grommets.
6. Now install driver side
tailpipe #D. The spare tire may
need to be loosened and
pushed to the driver side to
allow for clearance. Use bolt kit
#H to attach both tailpipes
together.
7. Using clamps #G secure
both tailpipes to the outlets of
the muffler. Rotate tailpipes to
best fit your truck.
8. Install stainless steel tip.
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.