SSICRE07
Designed for
2007 - 2013 Chevrolet® Silverado & GMC® Sierra Crew-Cab 1500 series with base or premium radio
2007 - 2014 Chevrolet® Silverado & GMC® Sierra Crew-Cab 2500/3500 series with base or premium radio
Subwoofer Power Harness
Wire Taps x2
Adaptor Harness
25A Fuse
Wire Ties x6
Subwoofer Assembly
Subwoofer Body Harness
©2012 Stillwater Designs
SSICRE07-A4-20141002
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Installation
1. Disconnect the negative battery cable from the battery. (For diesel engines with dual batteries, disconnect
both negative cables)
2. Remove cover on the driver’s end of the dash. Fig. 1
3. Remove the bolt securing the parking brake release lever. Some trucks may not have a release lever, but
there is still a bolt in that location that must be removed. Fig. 2
4. Remove the two screws securing the panel below the steering column and pull the panel loose. Fig. 2
5. Remove the two screws securing the panel below the radio and pull the panel loose.
6. Pull the radio bezel loose and disconnect the wiring. Fig. 3
7. Remove the six screws securing the radio and HVAC controls. HVAC control wiring does not need to be
disconnected. Fig. 4
8. Pull radio from dash and disconnect all wiring.
9. Route the signal input wire with the white two pin connector on it along the driver’s side of the vehicle and
up to the driver’s kick panel or radio opening depending on installation. (If vehicle is equipped with the
Factory Premium sound system, refer to the instructions for Factory Premium sound system for signal wire
routing and connection.)
Subwoofer Input Connection with Optional Amplifi er
10. Connect the white two pin connector of the amplifi er harness to the corresponding connector of the
subwoofer harness.
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Subwoofer Input Connection without Optional Amplifi er and without Factory Premium Audio
11. Connect the six inch adaptor harness to the end of the two pin connector. Locate position 2 and 9 on
the radio connector and install one of the blue self stripping connectors onto the wire. Lay the wire in the
open channel, fold the connector body over and squeeze with a pair of pliers until connector snaps shut.
Connect the green wire of the adaptor harness to the wire in position 2 and the brown wire to the wire in
position 9.
Subwoofer Input Connection with Factory Premium Audio
12. Pry the storage tray loose in the center console. Fig. 5
13. Starting at the end of the subwoofer harness that was routed toward the dash, carefully cut the sheathing back about 30 inches. Fig. 6
14. Pull the signal input wire out and route it under the carpet and into the center console. Connect the six
inch adaptor harness to the end of the two pin connector. Locate the blue and white striped wire and the
green and black striped wire in the four-pin connector of the console. Lay the wire in the open channel, fold
the connector body over and squeeze with a pair of pliers until connector snaps shut. Fig. 7
15. Connect the green wire of the adaptor harness to the blue/white wire and the brown wire of the adaptor
harness to the green/black wire. Fig. 8
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