American Autowire - 1969-1972 Forward Lamp Wire Harness - GMC Truck - 22530DI

DESCRIPTION

American Autowire 1969-1972 Forward Lamp Wire Harness - GMC Truck - 22530DI

Restore your classic GMC pickup's front lighting and charging system wiring with this 1969–1972 GMC Truck Front Light Wiring Harness, manufactured by American Autowire as part of its Factory Fit original reproduction wiring line.

Designed for GMC pickups equipped with factory gauges and side marker lights, this harness is specifically modified for trucks using a GM SI-series internally regulated alternator mounted on the driver side of the engine compartment.

Unlike the original external voltage regulator wiring configuration, this modified harness accommodates an internally regulated alternator conversion without requiring the original external regulator connections.

Manufactured according to original General Motors specifications, the harness arrives fully assembled, taped, and ready for installation. It connects at the factory firewall location and follows original-style routing through the engine compartment.

Whether you're restoring a 1969 GMC C1500, upgrading the charging system on a 1971 GMC pickup, or replacing deteriorated wiring in your 1972 GMC truck, this American Autowire front light harness combines original-style fitment with compatibility for a modernized alternator configuration.

Brand: American Autowire
Part Number: 22530DI
Product Type: Front Light Wiring Harness
Product Line: Factory Fit Original Reproduction Wiring
Vehicle Years: 1969–1972
Vehicle Application: GMC Pickup Trucks
Gauge Configuration: Factory Gauges
Side Marker Lights: Required
Alternator Configuration: GM SI-Series Internally Regulated
Alternator Location: Driver Side
External Voltage Regulator Wiring: Not Included
Quantity: Sold Individually

Features

• Original-style front light wiring harness for 1969–1972 GMC pickups

• Manufactured by American Autowire

• Part of the Factory Fit reproduction wiring line

• Designed for trucks equipped with factory gauges

• Compatible with original-style side marker light configurations

• Modified for driver-side GM SI-series internally regulated alternators

• Eliminates the original external voltage regulator wiring

• Connects at the factory firewall harness location

• Follows original-style engine compartment routing

• Fully assembled and taped for installation

• Suitable for compatible one-wire internally regulated alternators

• Ideal for classic GMC truck restorations, wiring repairs, and alternator upgrades

Vehicle Fitment

GMC Pickup Trucks

• 1969 GMC C15/C1500 Pickup

• 1970 GMC C15/C1500 Pickup

• 1971 GMC C15/C1500 Pickup

• 1972 GMC C15/C1500 Pickup

• 1969–1972 GMC C25/C2500 Pickup*

• 1969–1972 GMC K15/K1500 Pickup*

• 1969–1972 GMC K25/K2500 Pickup*

The manufacturer lists this harness for 1969–1972 GMC pickups. Verify the original wiring configuration for your specific truck series before ordering.

Required Vehicle Configuration

This harness is designed for GMC pickups equipped with:

• Factory gauges rather than warning-light-only instrumentation

• Factory-style side marker lights

• A driver-side mounted GM SI-series internally regulated alternator

• Compatible original-style firewall wiring connections

Important: This is not the correct harness for every 1969–1972 GMC truck. Alternator mounting location, charging system configuration, and gauge package must be verified before ordering.

Designed for an Internally Regulated Alternator Conversion

One of the most important features of American Autowire part 22530DI is its compatibility with a GM SI-series internally regulated alternator.

Driver-Side Alternator Configuration

The harness is specifically designed for an internally regulated alternator mounted on the driver side of the engine compartment.

If your alternator is mounted on the passenger side, a different harness configuration may be required.

Eliminates External Voltage Regulator Wiring

Original GMC charging systems commonly used an external voltage regulator.

This modified harness is designed for an internally regulated alternator and does not include the wiring connections for the original external voltage regulator.

Compatible with Certain One-Wire Alternators

The harness may also be used with a compatible one-wire internally regulated alternator.

When using a one-wire alternator, the two-wire SI-series alternator connector must not be connected.

Why Replace Your GMC Truck's Front Light Wiring Harness?

After decades of use, original engine compartment wiring can become brittle, cracked, corroded, or damaged by previous repairs.

Restore Front Lighting Wiring

The front light harness is associated with several important electrical functions, which may include:

• Headlight circuits

• Parking light circuits

• Front turn signal circuits

• Horn and horn relay circuits

• Charging system connections

Exact circuit coverage depends on the original vehicle configuration.

Replace Aging Electrical Components

A new harness provides an alternative to repairing numerous damaged wires, terminals, and connections throughout the engine compartment.

Maintain Original-Style Routing

American Autowire Factory Fit harnesses are designed to follow original GM wiring routing and connect at the factory firewall location.

Upgrade Your Charging System

This modified harness allows owners to retain an original-style wiring layout while accommodating a compatible internally regulated alternator.

Important Fitment & Installation Information

• Designed for 1969–1972 GMC pickup trucks with the specified factory equipment.

• Requires factory gauges and side marker light configuration.

• Intended for a driver-side mounted GM SI-series internally regulated alternator.

• Does not include original external voltage regulator wiring.

• Verify alternator type and mounting location before ordering.

• If using a one-wire alternator, do not connect the two-wire SI-series alternator connector.

• Trucks with passenger-side alternators require verification of a different harness.

• Trucks equipped with warning lights rather than factory gauges may require a different part number.

• Not confirmed for Chevrolet pickups, GMC K5 Jimmy, or Suburban applications.

• Verify compatibility with aftermarket alternators and other electrical modifications.

• This is a front light wiring harness, not a complete vehicle wiring kit.

• Consult the factory service manual to confirm circuit coverage and proper installation.

Frequently Asked Questions

Will this front light harness fit my 1972 GMC pickup?
Yes, if your 1972 GMC pickup has the compatible factory gauge and side marker light configuration and uses a driver-side GM SI-series internally regulated alternator.

What is the difference between part 22530 and 22530DI?
Part 22530 is designed for the original alternator configuration with an external voltage regulator. Part 22530DI is modified for a driver-side mounted GM SI-series internally regulated alternator.

What does DI mean in the part number?
DI identifies the driver-side alternator mounting configuration for the modified internally regulated alternator harness.

Does this harness work with an internally regulated alternator?
Yes. It is specifically designed for a compatible GM SI-series internally regulated alternator.

Will this harness work with a one-wire alternator?
Yes, with a compatible one-wire internally regulated alternator. The two-wire SI-series connector must not be used in that configuration.

Does this harness include external voltage regulator wiring?
No. This modified harness does not include wiring for the original external voltage regulator.

Will this fit a truck with factory warning lights instead of gauges?
This specific harness is listed for GMC pickups equipped with factory gauges. Trucks with warning-light-only instrumentation may require a different harness.

Does this harness include headlight wiring?
American Autowire front light harnesses generally include headlight and other front lighting circuits. Verify the exact circuit coverage for your truck using the factory service manual.

Does this harness come assembled?
Yes. American Autowire Factory Fit harnesses arrive fully assembled and taped.

Where does this wiring harness connect?
It connects at the original firewall location and follows factory-style routing through the engine compartment.

Will this fit a 1970 Chevrolet C10?
This part number is listed for GMC pickup applications. Chevrolet compatibility has not been confirmed.

Is this a complete truck wiring kit?
No. This is the front light wiring harness. Other harnesses, including engine, dash, and rear lighting harnesses, are separate components.

Restore Your Classic GMC Truck's Electrical System

Whether you're repairing aging wiring or upgrading your truck to an internally regulated alternator, the 1969–1972 GMC Front Light Wiring Harness – American Autowire 22530DI provides a factory-style replacement designed for your charging system configuration.

At Tuckers Classic Auto Parts, we offer quality restoration and electrical components to help classic Chevy and GMC truck owners keep their vehicles on the road.

Tuckers Classic Auto Parts – Helping Keep Classic Trucks on the Road Since 1993.