User Manual

95-3318B

Connections to be made

For models with a BOSE sound-system:

• Connect the Green wire to the left rear positive speaker output.

• Connect the Green/Black wire to the left rear negative speaker output.

• Connect the Purple wire to the right rear positive speaker output.

• Connect the Purple/Black wire to the right rear negative speaker output.

• Disconnect the 4-pin harness that has the White, White/Black, Gray, Gray/

Black wires, and then connect the supplied 4-pin to 4-pin resistor pad harness.

• Connect the Red and White RCA jacks to the audio AUX-IN on the aftermarket

radio (if so equipped).

Note:

o This will allow you to retain the 3.5 AUX-IN JACK in the console.

o The 3.5 jack can only be used if it is a single AUX-IN jack.

o If the AUX-IN jack has a USB port, neither can be used.

• The Black/Yellow wire is used for OnStar level adjustment for models that do

not come equipped with steering wheel controls. See OnStar Level Adjustment

for further instructions.

• Tape off and disregard the White/Red and White/Green wires, they will not be

used in this application.

• The female Yellow RCA jack will connect to the male Yellow RCA jack on the

20-pin Gray harness.

Note: The 4-pin black connector will not be used in this application.

Note: Some models do not have speed sense on the data-bus. Refer to the

20-pin Gray harness to the aftermarket radio step. If you do not have a wire

populated on the factory side of the 20-pin harness, connect this wire instead.

• Connect the Yellow RCA jack to the rearview camera input.

Note: The Rearview Camera Input is used to display the Personalization Menu

and the Climate Control status. If the aftermarket radio does not have a screen

with a Rearview Camera Input, then there will be no visualization of the Climate

Controls Status or Personalization Menu. An externally mounted screen could be

substituted in this situation.

From the 3318 harness to the aftermarket radio:

• Connect the Black wire to the ground wire.

• Connect the Yellow wire to the battery wire.

For models without a BOSE sound-system:

• Cut the resistors off from the Green, Green/Black, Purple, and Purple/Black

wires below the heat shrink.

• Connect the Green wire to the left rear positive speaker output.

• Connect the Green/Black wire to the left rear negative speaker output.

• Connect the Purple wire to the right rear positive speaker output.

• Connect the Purple/Black wire to the right rear negative speaker output.

• Leave connected the 4-pin connector that has the White, White/Black, Gray,

Gray/Black wires.

Note: The 4-pin to 4-pin resistor pad harness will not be used in this application.

Continued on the next page