08/29/17
Removal:
1) Raise the vehicle up on a hoist or rack to working height. If you do not have access to a hoist
or rack raise the vehicle and support securely with jack stands.
2) Support the muffler with a stand. Using a hacksaw or sawsall, cut the
stock tailpipe off just behind the muffler. Separate the wire hangers on the
tailpipe from the rubber mounts on the vehicle and remove the tailpipe from
the vehicle. This step is not mandatory but makes removal easier.
3) Using a 15mm wrench, loosen the bolt on the clamped ball connection
behind the catalytic converter. Separate the wire hangers from the rubber
mounts on the vehicle and lower the inlet pipe and muffler from the vehicle. A
lubricant will make removal much easier. You will need to remove the ball
clamp from the stock system; it will be reused with the Flowmaster system.
Installation:
1) Place inlet pipe assembly #26429S into position onto the ball
connection behind the catalytic converter. Reinstall the clamp onto the ball
connection and tighten enough to hold, but still allow for a small amount of
adjustment. Connect the hanger on the pipe to the rubber mount on the
vehicle.
2) If installing the system on a Crew Cab truck with a 6.5’ bed, place
extension pipe #TB700S onto the back of the #26429S inlet pipe, place a
provided clamp onto the slip-fit and tighten enough to hold in position. This
extension pipe will not be used on Double Cab or Crew Cab-5.5’ bed models.
Pg 1 of 4 Technical Support (707) 544-4761
Installation Instructions for:
SYSTEM #817689
2014-2018 GM SILVERADO/SIERRA 1500 · (NON HD)
FITS: 5.3L ENGINES ONLY
CREW CAB 4WD & DOUBLE CAB 2WD/4WD
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