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Black rectangular wiring harness with one 24-pin and one 12-pin connector, multicoloured wires visible

METRA

METRA 71-2003-1 GM 1998-2008 Reverse Wire Harness 24 & 12 Pin

SKU CH-PGWW-5YJM1

A reverse wiring harness with 24-pin and 12-pin plugs for select 1998-2008 GM vehicles to replace damaged factory radio connectors

  • TypeDash Installation Kits
  • Plugs directly into the factory radio using one 24-pin and one 12-pin connector
  • Restores full speaker and power connections with colour-coded wires for every channel
  • Repairs damaged or cut harnesses without splicing into the original loom
  • Matches select GM vehicles from 1998 to 2008 for a precise fit
  • New condition ensures reliable contacts and clean insulation from day one

GM 1998-2008 Reverse Wire Harness

This Metra 71-2003-1 reverse wire harness fits select General Motors vehicles from 1998 through 2008. It connects directly to the original equipment radio using one 24-pin plug and one 12-pin plug. The fully pinned harness restores the factory connector interface for aftermarket head unit installation. It serves installers and owners who need a reliable plug-and-play solution.

Replaces Cut or Damaged Factory Harness

The harness replaces a factory plug that has been cut off or damaged during a previous stereo removal. It is worth using when the original connector is missing and splicing individual wires would be time-consuming or error-prone. The colour-coded leads match the OEM wiring scheme for constant power, accessory power, ground, illumination and four speaker pairs. This avoids the guesswork of tracing unknown wires in the dash.

Limited to Specific GM Pin Configuration

The practical limit is the fixed 24-pin and 12-pin layout used on certain GM models between 1998 and 2008. Vehicles outside that range or trim level often use a different connector count or pin assignment, so the harness will not plug in. It does not adapt to single-DIN or double-DIN aftermarket radios without a separate vehicle-specific install kit. Buyers must verify the exact plug style before purchase.

Highlights

  • Plugs directly into the factory radio using one 24-pin and one 12-pin connector
  • Restores full speaker and power connections with colour-coded wires for every channel
  • Repairs damaged or cut harnesses without splicing into the original loom
  • Matches select GM vehicles from 1998 to 2008 for a precise fit
  • New condition ensures reliable contacts and clean insulation from day one

Specifications

TypeDash Installation Kits

Questions about this item

Will the 24-pin and 12-pin plugs on this 71-2003-1 harness connect directly to the factory radio in my 2000-up GM vehicle?

Yes, the harness is designed to plug straight into the OEM radio using one 24-pin and one 12-pin connector, matching the factory wiring layout.

What is the most common mistake when installing this reverse wire harness?

The step people often miss is verifying each colour-coded wire — yellow for 12 V constant, red for accessory, black for ground, orange for illumination, and the matched speaker pairs — against the vehicle's wiring diagram before crimping or soldering.

If a speaker wire such as the green or purple lead gets damaged later, can I replace just that lead?

The harness is fully pinned, so individual wires can be depinned and replaced without buying a new harness, provided the correct terminal crimps are used.

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