GMAFM GM-PS AFM/DFM Disabler for GM V6 and V8

GMAFM GM-PS AFM/DFM Disabler is a plug-in module listed for compatible GM vehicles with V6 or V8 engines and active or dynamic fuel management. It connects through the OBD-II port, but the listing excludes 10-speed transmission models and several newer model years, so exact vehicle fit is essential.

At a glance

Designed for GM vehicles equipped with active or dynamic fuel management, according to the listing.
Plugs into the vehicle's OBD-II port. The listing describes installation as tool-free.
The maker says it is intended to keep the factory ECU. Its safety and warranty assurances are manufacturer claims, not independently established guarantees.
Listed applications include Chevy Silverado, GMC Sierra, Tahoe, Yukon, Suburban and Escalade, with several engine sizes named in the title.

Price

$42.49Save 15%

Reference price: ~~$49.99~~

Price checked: Nov 14, 2026

View offer

Pros and cons

Pros

OBD-II plug-in installation avoids a described tool-based fitting process.
The listing names a range of GM trucks and SUVs and both V6 and V8 applications.

Technical specifications

5 specifications

Identity
Brand	GMAFM
Model	GM-PS

Display and video
Screen size	1

Power and battery
Power configuration	Corded Electric

Fitment and installation
Vehicle fit type	Vehicle Specific Fit

What to know before buying

The maker advises removing the module during extended non-use to prevent battery drain. The claimed compatibility and ECU and warranty assurances are not independent confirmation.

Listing details to confirm

Fitment exclusions are important: the listing says it is not compatible with 10-speed transmission models or 2022+ refresh models, and its description additionally excludes 2025 and 2026 models. The title's broad vehicle and engine wording does not establish fit for every listed vehicle, so confirm the exact year, transmission and engine before purchase. The specification section gives a screen size of 1 even though the product is described as an OBD-II module and no screen function is explained. Treat that field as unclear rather than evidence of a usable display.

What’s in the box

Included

1 GMAFM AFM/DFM device

Who is it for?

A good fit for

GM vehicle owners seeking an OBD-II module intended to alter AFM or DFM behavior, after confirming exact vehicle fit.
Drivers who prefer a plug-in installation and are willing to follow the stated battery-care advice.

Less suited to

Owners of 10-speed transmission models, 2022+ refresh vehicles, or the additionally excluded 2025 and 2026 models, based on the listing's stated exclusions.
Buyers who need confirmed fitment for a specific year, trim, engine or transmission without checking those details first.

GMAFM GM-PS AFM/DFM Disabler for GM V6 and V8 · photo 2 — Additional product photo 2

Customer reviews on Amazon

5 / 5 · 38 ratings

5 stars97%97%
4 stars3%3%
3 stars0%0%
2 stars0%0%
1 star0%0%

The supplied evidence contains aggregate ratings but no customer comments. The rating distribution is strongly positive, with a small share of four-star ratings, but it does not reveal why customers rated the module that way or establish fitment for a particular vehicle. For buyers, exact compatibility matters more than the overall rating because the listing names notable transmission and model-year exclusions.

Frequently asked questions

How does the GMAFM GM-PS connect?

The listing says it plugs directly into the vehicle's OBD-II port and describes installation as requiring no tools.

Which vehicles are excluded?

The listing excludes models with 10-speed transmissions and 2022+ refresh vehicles. Its description also states that 2025 and 2026 models are not compatible. Confirm the exact vehicle configuration before buying.

Should the module remain connected when the vehicle is unused for a long time?

The maker advises removing it during extended periods of non-use to help prevent battery drain.

Does the listing confirm a display on the module?

No display function is explained. Although the specification table gives a screen size of 1, the module is described as an OBD-II device, so that field is unclear.