Description
Product Overview
The Range Technology OBDII Power Relay (RA003R) is a corded electric device designed to replace factory AFM relays in select Buick, Cadillac, Chevrolet, GMC, Isuzu, SAAB, Pontiac, Saturn, and Suzuki GM vehicles. Housed in a compact 4 × 4 × 1 inch aluminum case weighing only 0.32 oz, the relay features a bright red LED that confirms active operation. It draws power directly from the vehicle’s OBD‑II port, requiring no additional wiring or ECU reprogramming, and restores full cylinder power for smoother acceleration.
Usage
This relay is ideal for everyday drivers, performance enthusiasts, and fleet operators who experience engine hesitation or cylinder drop due to a faulty AFM system. Installation is as simple as plugging the unit into the OBD‑II port; the device powers up instantly and begins regulating engine management. It works in all operating systems and is vehicle‑specific, ensuring a perfect fit for the supported GM models. 
Why Choose Us
Range Technology is known for precision engineering and durable automotive components. The RA003R relay is manufactured to OEM standards, offering a lightweight yet robust solution that does not alter factory ECU settings. If you need to revert to stock performance, simply unplug the relay. Our product carries a strong customer rating of 4.6 stars from over a thousand reviews, reflecting reliability and satisfaction.
Key Features
- Plug‑and‑play design – connects directly to OBD‑II port
- Red LED indicator for instant status verification
- Lightweight aluminum housing reduces added weight
- No ECU reprogramming – easy removal restores factory settings
- Compatible with a wide range of GM makes and models
FAQ
Will this relay affect my vehicle warranty?
The RA003R is an aftermarket replacement that does not modify the factory ECU, so it typically does not void the warranty. However, we recommend checking with your dealer for specific warranty terms.
Is any special tool required for installation?
No special tools are needed. Simply locate the OBD‑II port, plug in the relay, and it powers up automatically.
Can I use this relay on non‑GM vehicles?
This unit is engineered for select GM models listed in the compatibility guide. Using it on other brands may result in improper function.
What does the red LED indicate?
The red LED lights up when the relay is receiving power and actively managing the engine’s AFM system, providing a visual confirmation of operation.
How do I revert to the original factory setup?
To return to factory settings, simply unplug the relay from the OBD‑II port. The vehicle’s original ECU configuration will resume without any permanent changes.
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