IceHeat C11 AFM/DFM Disabler

The IceHeat C11 AFM/DFM Disabler is an OBD-II module listed for GM V6 and V8 engines. The listing says it keeps the engine in full-cylinder mode and plugs in without tools, but fitment exclusions make checking the exact vehicle essential.

At a glance

The listing describes an OBD-II plug-in module intended to disable cylinder deactivation and keep compatible engines in full-cylinder mode.
The manufacturer claims installation requires no tools or tuning and says unplugging the module reverts the change.
Auto-sleep and wake-on-start are claimed. The listing recommends unplugging before parking for more than two weeks.
Compatibility is described broadly as most GM V6 and V8 engines, with specific exclusions for some newer vehicles.

Price

$49.99Save 50%

Reference price: ~~$99.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

Tool-free OBD-II installation is a straightforward approach for owners whose vehicle is confirmed compatible.
Auto-sleep is intended to avoid unplugging after each drive, while the product can be unplugged to revert the change.

Technical specifications

3 specifications

Identity
Brand	IceHeat
Model	C11

Dimensions and installation
Weight listed	2.39 ounces

What to know before buying

The listing excludes 10-speed transmission models, 2019-and-newer Silverado/Sierra with 5.3L or 3.6L engines, and 2022-and-newer Refresh trucks and SUVs. Confirm the exact vehicle against the compatibility chart before purchase. It recommends unplugging for parking periods over two weeks. Claims about reduced vibration, engine wear, electrical protection, temperature tolerance, dashboard warnings, and warranty impact are manufacturer claims, not independently verified outcomes.

Who is it for?

A good fit for

Owners of a GM V6 or V8 vehicle confirmed compatible who want to avoid cylinder-deactivation operation.
Buyers looking for a plug-in installation that the listing says needs no tools or tuning.

Less suited to

Owners of vehicles covered by the stated transmission, engine, or model-year exclusions.
Buyers who need independently verified evidence of fitment, functionality, or claimed engine-protection effects.

IceHeat C11 AFM/DFM Disabler · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 65 ratings

5 stars89%89%
4 stars0%0%
3 stars0%0%
2 stars6%6%
1 star5%5%

Customer feedback highlights easy, tool-free installation and perceived value, but reports mixed experiences with functionality. The plug-in OBD-II format aligns with the reported ease of setup, while the mixed functionality comments matter because fitment is vehicle-specific and the listing names significant exclusions. Aggregate ratings lean strongly toward five-star ratings, but include some low-star ratings and do not establish performance for a particular vehicle.

Positive themes

Customers describe installation as easy and requiring no tools.
Customers report positive value for money.

Mixed feedback

Functionality receives mixed feedback.

Frequently asked questions

Will the IceHeat C11 fit my GM vehicle?

The listing says it works with most GM V6 and V8 engines, but excludes 10-speed transmission models, 2019-and-newer Silverado/Sierra with 5.3L or 3.6L engines, and 2022-and-newer Refresh trucks and SUVs. Check the compatibility chart for your exact vehicle.

Does it require tools or tuning?

The manufacturer describes it as a plug-in OBD-II device requiring no tools or tuning. Fitment still needs to be confirmed for the vehicle.

Should it remain plugged in while parked?

The listing claims auto-sleep and recommends unplugging it as a precaution if the vehicle will be parked for more than two weeks.

What do customers report about it?

Feedback describes installation as easy and requiring no tools, with positive value-for-money comments. Functionality feedback is mixed, so reported ease of setup should not be taken as proof that it will work as intended in every compatible vehicle.