Stereo Installation/Kit Preparation
GM1485 KIT
Shaft Radio (Illustration A)
- Attach the left and right side brackets to the mounting panel with the carriage bolts provided.
- Snap the supplied shaft support tabs into the radio opening and mount the stereo as shown.
DIN Radio with Mounting Sleeve (Illustration B)
- Attach the left and right side brackets to the mounting panel with the carriage bolts provided.
- Secure sleeve to kit as shown.
GM1486 KIT
ISO Mount (DIN) Radios with Side Mounting Holes (Illustration C)
- Attach the left and right side brackets to the mounting panel with the carriage bolts provided.
- Snap the ISO mounting brackets to the back of the mounting panel (1 left and 1 right). For additional support, the ISO brackets can be bolted to the back of the kit panel in four locations with supplied screws.
- Snap the ISO trim ring into the front of the kit.
- Release and remove mounting sleeve from radio, if you have not already done so.
Load the aftermarket radio from the REAR of the mounting panel until the nosepiece of the radio comes through the front of the kit.
Adjust the radio to the opening as desired and use the short screws provided from the stereo manufacturer to secure the radio as shown.
CAUTION: REAR SUPPORT IS ESSENTIAL TO THE INSTALLATION'S STRUCTURAL INTEGRITY. ?
Factory Wire Codes
NOTES: All wire codes are viewed as looking at the front of the plug with the wires exiting the rear. Use these wiring codes as a guide. Your vehicle might differ.
1988-UP GENERAL MOTORS
BLACK - POWER:
- 1 = GROUND
- 2 = DIMMER
- 3 = ILLUMINATION
- 4 = POWER ANTENNA
- 5 = +12V SWITCHED, IGNITION
- 6 = 12V CONSTANT, BATTERY
(Vehicles equipped with "mini-type" connectors)
WHITE - FRONT SPEAKERS:
- 1 = LEFT FRONT NEGATIVE
- 2 = LEFT FRONT POSITIVE
- 3 = RIGHT FRONT NEGATIVE
- 4 = RIGHT FRONT POSITIVE
BLUE - REAR SPEAKERS:
- 1 = LEFT REAR POSITIVE
- 2 = LEFT REAR NEGATIVE
- 3 = RIGHT REAR NEGATIVE
- 4 = RIGHT REAR POSITIVE
| 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 |
|---|---|---|---|
| 1 | 2 | 3 | 4 |
|---|---|---|---|
NOTE: The following connectors are available to easily plug your new stereo cassette/disc player into the factory harness.
| PART #: | DESCRIPTION: |
|---|---|
| GM02 | 1988-UP General Motors Vehicles Plugs into car harness. |
| MDA-1 | Micro/Delco Antenna Adapter |
Radio Removal
- Engage parking brake.
- Place key in ignition and depress brake to shift vehicle into lowest gear. This will allow the gear shift arm to be out of the way.
- Carefully pull out on dash instrument/radio dash bezel to release spring clips, unplug connectors and remove panel.
- Compress the two plastic side radio mounting clips, slide radio out of dash, unplug connectors and remove radio.
Note: Use caution when removing the dash bezel over the hazard switch. The hazard switch may need to be pushed down as if to activate the hazard lights to allow the bezel to slide over it. ?
Note (2): It is recommended that you use the Scosche GM02 factory connector and the MDA-1 antenna adapter to eliminate the need to cut any of the factory plugs. ✔️
Diagrammatic Component Descriptions
The kit includes various components for installing an aftermarket stereo into compatible General Motors vehicles. Key parts include:
- Clip Mounting Brackets (Left and Right): These brackets attach to the sides of the mounting panel to secure the stereo.
- Hex Nuts and Carriage Bolts: Fasteners used to assemble the mounting brackets and panels.
- ISO Bracket (GM1486 Only): A specific bracket for ISO-mount radios, attaching to the back of the panel.
- ISO Trim Ring (GM1486 Only): A trim piece that fits around the front of the stereo opening.
- Shaft Tabs: Small tabs that snap into the radio opening to support shaft-type radios.
- Kit Panel: The main dashboard mounting panel that adapts the vehicle's dash to accept aftermarket stereos.
- Mounting Sleeve: A metal sleeve that often comes with DIN radios, which slides into the kit panel.
- Radio's Rear Support Strap: A strap to provide additional support to the rear of the radio.
- Radio's Supplied Faceplate/Trimplate: Decorative pieces that come with the aftermarket radio to fill gaps.
Illustrations show:
- Illustration A: Assembly of shaft radio components, including side brackets, shaft tabs, and rear support strap.
- Illustration B: Assembly of DIN radio components, including side brackets, mounting sleeve, and trimplate.
- Illustration C: Assembly of ISO mount DIN radio components, including side brackets, ISO mounting brackets, and ISO trim ring.
