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Stealthbox
®
INSTALLATION GUIDE
SB-GM-SXT/10W6v2, JL AUDIO, Inc 2006
Sheet SKU#011199 Revision 1/12/2006 Page 1
for the
SB-GM-SLVEXT/10W6v2
(1999-2005 Chevrolet Silverado / 
GMC Sierra Extended Cab Trucks
with full rear bench seating.)
(These instructions show for both enclo-
sures. These enclosures are
sold separately )
This Stealthbox is a product which 
requires professional installation skills and 
tools. 
Please read this installation guide thoroughly before beginning the project. It 
will guide you step by step through the 
installation.Several of the steps in this 
process may require two people to 
accomplish.
It is absolutely vital that the enclosure 
be properly mounted to the vehicle 
according to these instructions. Failure 
to mount the enclosure properly presents two problems: 1) The sub-bass 
performance will suffer due to the 
movement of the enclosure caused by 
the force exerted by the woofer(s) and
2) A loose enclosure presents a serious 
safety hazard in the event of a collision 
or sudden deceleration.
Please enjoy your JL Audio Stealthbox 
responsibly.
Passenger’s Side
STEP 1:
Remove all contents from the rear
floor area. 
Remove the paper backing and place the sup-
plied wax square on the passenger’s side rear 
floor.The middle of the wax square needs to 
be placed 6.5”in front of the rear bulkhead 
and 6.0”away from the transmission tunnel.
Driver’s Side
STEP 1:
Remove all contents from the rear
floor area. 
Remove the paper backing and place the sup-
plied wax square on the driver’s side rear floor. 
The middle of the wax square needs to be 
placed 6.5”in front of the rear bulkhead and
6.0”away from the transmission tunnel.
STEP 3:
Thread in the supplied socket cup 
set screw into the/each enclosure, leaving 
about 1/2”of the treads exposed.
Make sure that the cup end of the set screw 
is on the outside of the enclosure.
STEP 4:
Place the/each enclosure into posi-
tion and press down firmly. 
Remove the/each enclosure.The wax square
should have an impression of the socket cup 
set screw.
STEP 5: With the use of a 1/2” drill bit and dr ill. 
Drill out the floor at the impression on the wax 
square(s).
START 
HERE
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*CAUTION*
Before drilling, make sure that you are not going 
to be drilling into any gas lines, br ake lines, transmission lines, electrical wir ing, transfer case(4x4 
vehicles) or anything else that might cause a 
reduction in your weekly pay.Always wear eye 
protection when drilling.
6.5”
6.5”
6.0”
6.0”
X
X