Wiring Colour Codes Stereo GM

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   This is stolen from another site, and I did not make it, but I thought it was very useful.

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General Motors - General Pre 1978  

P O W E R

O E M   C O L O R

S T A N D A R D

Battery / Memory

Orange

Yellow

Ignition / Accessory

Yellow

Red

Ground

Black

Black

Power Antenna

N/A

Blue

Amplifier Turn On

N/A

Blue / White

Illumination

Gray

Orange

Dimmer

N/A

Orange / White

S P E A K E R S

O E M   C O L O R

S T A N D A R D

Front / Right +

Green

Gray

Front / Right -

Black (Common Ground)

Gray / Black

Front / Left +

White

White

Front / Left -

Black (Common Ground)

White / Black

Rear / Right +

Dark Blue

Purple

Rear / Right -

Internally Grounded Speaker

Purple / Black

Rear / Left +

Brown

Green

Rear / Left -

Internally Grounded Speaker

Green / Black
General Motors 1979- Current

P O W E R

O E M   C O L O R

S T A N D A R D

Battery / Memory

Orange

Yellow

Ignition / Accessory

Yellow

Red

Ground

Black

Black

Power Antenna

Pink

Blue

Amplifier Turn On

N/A

Blue / White

Illumination

Gray

Orange

Dimmer

N/A

Orange / White

S P E A K E R S

O E M   C O L O R

S T A N D A R D

Front / Right +

Light Green

Gray

Front / Right -

Dark Green

Gray / Black

Front / Left +

Tan

White

Front / Left -

Gray

White / Black

Rear / Right +

Dark Blue

Purple

Rear / Right -

Light Blue

Purple / Black

Rear / Left +

Brown

Green

Rear / Left -

Yellow

Green / Black 

20 pin power plug (1990 Up  )           ;  ;           ; ;           12 Pin power plug (1989 below)

More Plug Information     Picture on Bose connections 
32 pin power plug

3 pcs 12 pin power plug