Explainer
What Is an AFM Disabler? The Product Category Explained
A plug-in OBD-II module that stops GM cylinder deactivation from engaging — how it works, what it costs you, and what it cannot do.
6 min read
Blog
Plain-English answers on cylinder deactivation — what it does, what it costs you, and how to switch it off if you decide to.
Explainer
A plug-in OBD-II module that stops GM cylinder deactivation from engaging — how it works, what it costs you, and what it cannot do.
6 min read
Explainer
When cylinder deactivation engages, what you can feel, how to see it on a scan tool, and why towing and winter change everything.
6 min read
Explainer
Collapsible lifters, the valve lifter oil manifold and the ECU logic — one full deactivation cycle, component by component.
6 min read
Explainer
Where the idea came from, how GM built it, which vehicles carry it, and why it earned the reputation it has.
6 min read
Glossary
AFM, DOD, DFM, MDS, VLOM and DFCO decoded, so you can read a forum thread or a parts listing without guessing.
5 min read
Explainer
What Active Fuel Management does, which GM engines have it, why owners switch it off, and what that costs you.
5 min read
Guide
Where the OBD-II port hides on a Silverado, Sierra, Tahoe and Escalade, how to seat the module, and how to confirm it actually armed.
6 min read
Comparison
Reversible module or rewritten calibration — cost, warranty exposure, emissions and resale laid out side by side.
5 min read
Troubleshooting
Module not arming, resetting at every start, fighting your insurance dongle — the seven issues owners report and what resolves each.
5 min read
Fitment
Which GM V8s run AFM, which run DFM, and where the changeover happened across the truck and SUV lines.
5 min read
Review
Fuel economy before and after, shift behaviour, and whether the module stayed armed through a winter of short trips.
5 min read
Background
The mechanism behind collapsed lifters, why deactivation is implicated, and what prevention can and cannot achieve.
5 min read