1990 GMC Sierra 2500

1990 GMC Sierra 2500 Stereo Wiring Information Radio Battery Constant 12V+ Wire: Orange Radio Accessory Switched 12V+ Wire: Yellow Radio Ground Wire: Black Radio Illumination Wire: Gray Radio Dimmer Wire: Brown Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front … Read more

1991 GMC Sierra 2500

1991 GMC Sierra 2500 Stereo Wiring Information Radio Battery Constant 12V+ Wire: Orange Radio Accessory Switched 12V+ Wire: Yellow Radio Ground Wire: Black Radio Illumination Wire: Gray Radio Dimmer Wire: Brown Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front … Read more

1992 GMC Sierra 2500

1992 GMC Sierra 2500 Stereo Wiring Information Radio Battery Constant 12V+ Wire: Orange Radio Accessory Switched 12V+ Wire: Yellow Radio Ground Wire: Black Radio Illumination Wire: Gray Radio Dimmer Wire: Brown Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front … Read more

1993 GMC Sierra 2500

1993 GMC Sierra 2500 Stereo Wiring Information Radio Battery Constant 12V+ Wire: Orange Radio Accessory Switched 12V+ Wire: Yellow Radio Ground Wire: Black Radio Illumination Wire: Gray Radio Dimmer Wire: Brown Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front … Read more

1994 GMC Sierra 2500

1994 GMC Sierra 2500 Stereo Wiring Information Radio Battery Constant 12V+ Wire: Orange Radio Accessory Switched 12V+ Wire: Yellow Radio Ground Wire: Black Radio Illumination Wire: Gray Radio Dimmer Wire: Brown Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front … Read more

1995 GMC Sierra 2500

1995 GMC Sierra 2500 Stereo Wiring Information Radio Battery Constant 12V+ Wire: Orange Radio Accessory Switched 12V+ Wire: Yellow Radio Ground Wire: Black Radio Illumination Wire: Gray Radio Dimmer Wire: Brown Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front … Read more

1996 GMC Sierra 2500

1996 GMC Sierra 2500 Stereo Wiring Information Radio Battery Constant 12V+ Wire: Orange Radio Accessory Switched 12V+ Wire: Yellow Radio Ground Wire: Black Radio Illumination Wire: Gray Radio Dimmer Wire: Brown Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front … Read more

1997 GMC Sierra 2500

1997 GMC Sierra 2500 Stereo Wiring Information Radio Battery Constant 12V+ Wire: Orange Radio Accessory Switched 12V+ Wire: Yellow Radio Ground Wire: Black Radio Illumination Wire: Gray Radio Dimmer Wire: Brown Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front … Read more

1998 GMC Sierra 2500

1998 GMC Sierra 2500 Stereo Wiring Information Radio Battery Constant 12V+ Wire: Orange Radio Accessory Switched 12V+ Wire: Yellow Radio Ground Wire: Black Radio Illumination Wire: Gray Radio Dimmer Wire: Brown Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front … Read more

1999 GMC Sierra 2500

1999 GMC Sierra 2500 Stereo Wiring Information Radio Battery Constant 12V+ Wire: Orange Radio Accessory Switched 12V+ Wire: Yellow Radio Ground Wire: Black Radio Illumination Wire: Gray Radio Dimmer Wire: Brown Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front … Read more