Scosche GM20SRB Manual

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Side 1/2

GM20SR

CADILLAC CTS/SRX RADIO REPLACEMENT

INSTALLATION INSTRUCTIONS

The GM20SR is a plug and play interface that allows replacement of a General Motors Class II factory stereo in

Cadillac CTS and SRX vehicles. It will maintain operation of the OnStar® and factory amplified systems. The

GM20SR has on board switching to allow audio from the OnStar

® system to play through the two front factory

speakers when OnStar® is active. It also retains warning chimes for Onstar

® operation. For additional vehicle

integration, use Scosche’s line of SWC-1 steering wheel controls (SWC) interfaces to retain SWC’s with the

aftermarket radio. Also retains Vehicle Parking Assist chimes.

• Class II circuitry will not disable vehicle data bus even if interface loses power.

• OnStar® active LED and Ignition on LED

• Provides +12v switched accessory output. No more searching for switched +12v in fuse box or kick panel.

• Mute output to either mute the aftermarket radio or to turn it off when OnStar

® is active.

• OnStar® Volume control via factory steering wheel audio controls or click wheel .

• New radio will operate with the vehicle RAP (Retained Accessory Power) system, stays on after the key is turned

off and for 10 minutes or until a door is opened.

NOTE:

1. The GM20SR does not retain the factory XM receiver, you will lose this option when the factory radio is

replaced with an aftermarket radio.

2. You may use this interface even if the vehicle does not have OnStar® but need to the interface to operate the

factory amplifier.

3. OnStar® must be enabled using the OnStar® button on the rear view mirror, steering wheel OnStar

® button will

not enable OnStar®.

4. OnStar® volume is not adjustable on CTS-V and SRX models, volume is preset at medium level.

5. Not compatible with SRX Factory Navigation Radios.

SUPPORTED VEHICLES

INSTALLATION

2003-2007 CTS Compatible with both Navigation and Non-Navigation Radios

2004-2007 SRX Compatible with Non-Navigation Radios. Not Compatible with Navigation Radios.

NOTE: New vehicles are constantly being researched. If your vehicle is not listed above, check our web site for

any new updates or instructions.

CONNECTING THE GM20SR

NOTE: Due to the design of the Standard Amplified system, there is currently no way of fading from front to rear

with an aftermarket radio.

NOTE: If using a SWC-1 SWC-1 (SWC), the green wire on the is connected to the red wire of the red 20-pin

harness. SWC-1 must be programmed for Version #1.

Step 1. Prewire the GM20SR 18-pin wire harness to the aftermarket stereo wire harness. If the aftermarket stereo

has a mute wire, cut the brown wire as close as possible to pin #16 of the GM20SR 18-pin harness and connect

this mute output wire to the stereo’s mute wire. The amp remote wire (Blu/Wht) must be connected to the stereo’s

remote wire. Connect the 16-pin wire harness to the GM20SR main interface.

Step 2. Connect the black 8-pin, brown 8-pin, and the red 20-pin harness to the factory radio harnesses. Connect

the 16-pin wire harness into the GM20SR.

TESTING AND VERIFYING OPERATION

1. Turn ignition on. The red ignition LED on the side of the interface will turn on and the +12v accessory wire will

turn on.

2. Turn on the radio and check the balance. NOTE: Audio will not fade as the rear outputs of aftermarket radio can

not be used.

3. Pressing the OnStar® button on the mirror will mute or turn off the radio and allow the audio to be heard from

the speakers. The OnStar

® active red LED will also turn on. When OnStar

® disconnects, the radio will un-mute

or turn back on and the OnStar

® LED will turn off. OnStar® audio level can be adjusted using the volume

controls on the steering wheel (volume level is preset for CTS-V and SRX vehicles)

4. Turn off vehicle and remove key. RAP will be active and keep the radio on for 10 minutes or until a door is

opened.

5. The red LED and radio will turn off when RAP turns off or door is opened.

DISCLAIMER

In no event shall Scosche be responsible for claims beyond the replacement value of the defective product, or in any way liable

or responsible for consequential or incidental damages.

If you have any further questions call: TECH HELP 1-800-621-3695x3

Produkt Specifikationer

Mærke:	Scosche
Kategori:	Ikke kategoriseret
Model:	GM20SRB

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