Saturn Aura XR, Outlook XE/XR, Relay, VUE XR/Red Line 2006-2009 V6 AFM/DFM Disabler

Fits the 2006–2007 Saturn Relay, 2007–2009 Saturn Aura XR, 2007–2008 Saturn Outlook XE, 2007–2008 Saturn Outlook XR, 2008–2009 Saturn Vue XR and 2008–2009 Saturn Red Line. The module connects at the OBD-II port and keeps GM's cylinder deactivation from switching on, which means steady all-cylinder operation instead of repeated changes between full and partial mode. Installation is plugging it in. Nothing is spliced, flashed or removed from the engine, and the factory system resumes as soon as the module is unplugged.

What it fits

Listed applications, each a 100% fitment match:

• 2006–2007 Saturn Relay: 3.9L V6
• 2007–2009 Saturn Aura XR: 3.6L V6
• 2007–2008 Saturn Outlook XE: 3.6L V6
• 2007–2008 Saturn Outlook XR: 3.6L V6
• 2008–2009 Saturn Vue XR: 3.6L V6
• 2008–2009 Saturn Red Line: 3.6L V6

Confirm that your exact engine is the one in the table and that it uses cylinder deactivation. The RPO label and the VIN engine digit are the reliable ways to check, and support can confirm from a VIN.

How Active Fuel Management operates

GM's cylinder deactivation saves fuel by running the engine on fewer cylinders during light-load cruising. The switch is controlled by the engine computer. The module talks to the vehicle through the OBD-II port and keeps that reduced-cylinder mode from being selected, so all cylinders stay active.

Scan tools and inspections

Because it occupies the OBD-II port, unplug the module before connecting a scan tool, an insurance logger or an emissions-test probe, then plug it back in afterwards. Make sure it sits clear of your left knee and the pedals, and that the housing is fully seated in the port.

The first drive

Expect steadier behavior at part throttle and no change at wide-open throttle. Towing and hill climbing were already mostly done on all cylinders, so the biggest change is during relaxed cruising. Average fuel economy may drop slightly depending on how much of your driving is light-load highway time.

Why people turn AFM off

Many drivers would rather have predictable response than the small economy gain from running on fewer cylinders, especially when towing, hauling or driving in hills. Keeping AFM off removes the mode changes entirely. It does not add horsepower, and it is not a fix for an engine that already has lifter or oil-consumption problems.

Plug-in module vs. a mechanical AFM delete

There are three common ways to stop cylinder deactivation on GM engines: a plug-in module like this one, a custom tune that turns AFM off in the engine computer, or a mechanical delete that replaces the AFM lifters and related hardware and then needs a tune to match. The module is the only one of the three that needs no tools and no engine-computer changes, and it is the only one you can undo by unplugging it. It does not replace failed lifters; if hardware is already damaged, the repair comes first.

Diagnose existing problems first

This module prevents mode switching. It does not repair anything. If the engine already has a ticking lifter, misfire codes, low oil pressure or high oil consumption, have it diagnosed before relying on the module. Those symptoms need a mechanical repair, and keeping AFM off will not reverse damage that has already happened.

Oil and maintenance

Oil level and quality are worth watching on any AFM engine, because the deactivation hardware is hydraulic. Check the dipstick at fuel stops on high-mileage engines, follow GM's specified oil grade, and address oil-pressure warnings immediately. None of that changes with the module installed.

Check before ordering

• Your model year, model and engine match a row in the table (2006–2007 Saturn Relay, 2007–2009 Saturn Aura XR, 2007–2008 Saturn Outlook XE, 2007–2008 Saturn Outlook XR, 2008–2009 Saturn Vue XR and 2008–2009 Saturn Red Line).
• Find your engine code. On GM vehicles before the 2018 model year, the Service Parts Identification label (usually inside the glovebox on these trucks and SUVs) lists the three-character RPO codes, and the engine code starts with L. From 2018, GM moved that data into a QR code on the certification label on the driver-side door pillar. The 8th character of the VIN also identifies the engine.
• The engine runs cleanly with no stored misfire or AFM codes.
• If the vehicle has an engine swap, an aftermarket tune or a replacement engine computer, contact support first.
• Questions: support@automotivebypass.com with your VIN.

Shipping, returns and warranty

Free standard shipping covers the contiguous US, with dispatch in 1–2 business days and 3–4 days on the road after that. You have 45 days to request a return (pre-approval required, 20% restocking fee, buyer-paid return shipping). The module is backed by a 3-year limited warranty. For order or fitment questions, write to support@automotivebypass.com between 9 and 5 Pacific, Monday through Friday.