Owners manual

SYSTEM #17470
1996-1999 CHEVROLET/GMC C/K 1500 TRUCKS
5.7L EXTENDED CAB, SHORT BED
12/08/09
Removal:
1) Raise the vehicle up on a hoist or rack to working height and support securely with jack stands.
2) Using a hacksaw or sawsall, cut the stock tailpipe off where it exits the muffler. (This step is
not mandatory, but will make removal easier.)
3) Separate the two wire hangers on the tailpipe from the rubber mounts on the vehicle. Remove
the tailpipe and set aside.
4) Remove the Oxygen Sensor from the front pipe by first unplugging the wire at the clip
connection on the cross member then unscrewing the sensor from the fitting on the pipe using a 7/8”
wrench.
5) Support the muffler with a stand, then separate the wire hanger from the rubber mount in front
of the muffler.
6) Remove the three nuts at the muffler to cat flange connection. Remove the muffler and set
aside.
Installation:
1) Before installing anything, prep the clamps supplied in the hardware kit by removing the nuts,
and applying a thick lubricant such as white grease or anti-seize to the threads.
2) Place the inlet pipe assembly #26046 in position behind the flange that is welded to the back of
the catalytic converters. Be sure to install gasket #GA105 in between the two flanges. Connect the
wire hanger to its rubber mount. Re-install the factory nuts on the flange connection and tighten
securely. Reconnect the Oxygen Sensor to the fitting on the pipe and the wire connection on the
cross member.
3) Connect the inlet of muffler #530702 to the inlet pipe. Use a stand to support the muffler and
install a 3” clamp. Tighten enough to hold but still allow for adjustment.
4) Using the bolts, washers and nuts provided, mount tailpipe hanger bracket #166HA to the
frame rail on the left side of the vehicle. Replace the stock hanger on the right side of the vehicle with
a second #166HA. (They bolt approximately in the same position on either side of the vehicle.)
Place the rubber hanger mounts #HA168 onto the hanger brackets you just installed.
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