TARKARI CXZ103 AFM/DFM Disabler for GM V6/V8

TARKARI CXZ103 AFM/DFM Disabler is an OBD-II device listed for certain stock GM V6 and V8 vehicles with factory cylinder deactivation. The listing says it is removable and intended to keep the engine in full-cylinder mode, but exact fitment depends on year, engine, transmission and vehicle configuration.

At a glance

Plugs into the vehicle's OBD-II port. The listing says no programming or permanent ECU changes are required.
Designed to keep supported GM engines operating in full-cylinder mode instead of switching AFM/DFM modes.
The claimed compatibility excludes several newer model groups, 10-speed transmissions and modified vehicles.

Price

$49.99Save 33%

Reference price: ~~$74.99~~

Price checked: Nov 14, 2026

View offer

Pros and cons

Pros

Removable OBD-II connection is described as reversible, without permanent ECU changes.
The listing specifies a 3mA standby current.
The manufacturer describes installation as a direct plug-in that requires no special tools.

Cons

Fitment is limited to stock vehicles with factory AFM/DFM and excludes some newer GM vehicles and 10-speed automatic transmissions.

Technical specifications

12 specifications

Identity
Brand	TARKARI
Model	CXZ103-Carbon Fiber
Item model number	CXZ103
Manufacturer part number	DZ150001A

Dimensions and installation
Weight listed	1.76 ounces
Package dimensions	3.58 x 2.87 x 1.46 inches
Installation connection	OBD-II port

Compatibility and operation
Engine systems	Active Fuel Management or Dynamic Fuel Management
Engine sizes listed	4.3L, 5.3L, 6.0L, 6.2L V6 and V8 engines
Standby current	3mA

Appearance
Exterior	Painted
Position	Front Inside

What to know before buying

Listing details to confirm

Compatibility details are inconsistent: broad copy says most GM V6/V8 vehicles and excludes 2022.5+ refresh models, while the detailed fitment text lists some applications through 2022 and separately excludes 2022–2025 Silverado/Sierra and 2021+ new-generation full-size SUVs. Confirm the exact year, engine, transmission and factory configuration against the selected listing before buying. The smoother-driving and reduced-hesitation outcomes are manufacturer claims, not verified results.

Who is it for?

A good fit for

Owners of stock GM V6/V8 vehicles with factory AFM or DFM who want a removable OBD-II cylinder-mode device, after confirming exact fitment.
Drivers who prefer a plug-in installation over ECU programming or tuning.

Less suited to

Vehicles with 10-speed automatic transmissions, modified ECU tunes or custom engine calibrations.
Ford or Ram vehicles, or GM vehicles without factory AFM/DFM.
Buyers who need confirmed compatibility for a newer refresh or next-generation full-size SUV without first checking the exact application.

TARKARI CXZ103 AFM/DFM Disabler for GM V6/V8 · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 7 ratings

5 stars65%65%
4 stars35%35%
3 stars0%0%
2 stars0%0%
1 star0%0%

Only aggregate ratings are supplied, with ratings concentrated in the four- and five-star categories. The sample is small and includes no written feedback, so it cannot establish why customers rated the product that way or whether their vehicle fitment and driving experience matched the listing claims.

Frequently asked questions

How does this device connect?

The listing describes plugging it into the vehicle's OBD-II port, with no programming or special tools required.

Which vehicles does it fit?

It is claimed to fit certain stock GM V6 and V8 vehicles with factory AFM or DFM. The stated exclusions include 10-speed automatic transmissions and some newer refresh or next-generation models. Verify the specific year, engine and transmission.

Does it make permanent ECU changes?

The manufacturer says it makes no permanent ECU changes and can be unplugged to restore the vehicle's original settings.

Is the driving improvement guaranteed?

No. The listing claims it may reduce mode-switching sensations and promote steadier full-cylinder operation, but those outcomes are not independently established here.