Support
Common questions about the Range Technology plug-in line and our replacement parts, our warranty terms, and how returns work. If you do not find what you need, our team answers within one business day.
FAQ
The questions we hear most from wholesalers, workshops, and individual buyers.
Active Fuel Management (AFM) and Dynamic Fuel Management (DFM) are cylinder-deactivation systems used on General Motors V6 and V8 engines to reduce fuel use under light load. They switch off individual cylinders while driving, which some owners prefer to disable for consistent full-cylinder operation.
While plugged into the OBD-II port, the RA003B keeps the engine in full-cylinder mode instead of entering AFM or DFM cylinder-deactivation mode. The result is consistent power delivery and predictable engine behavior. It does not add power — it prevents the deactivation mode from engaging.
The module makes no permanent change: it does not reflash or reprogram the ECU, and when removed the vehicle operates exactly as before. Warranty decisions rest with the vehicle manufacturer and dealer; the module can simply be unplugged before dealer service if preferred.
No. Normal operation does not write data or set diagnostic trouble codes. Because nothing is reprogrammed, removing the module leaves the vehicle in its original configuration.
Yes. The module is designed to stay connected. It enters sleep mode after the ignition is switched off, drawing negligible current, and wakes automatically when you start the vehicle.
Only one device can use the OBD-II port at a time, and stacking devices is not supported. If your vehicle runs a handheld tuner, insurance dongle, or fleet tracker, remove it before installing the disabler module.
Check the Compatibility page, or send us your year, make, model, engine, and VIN. For 2022 GM trucks the 12th digit of the VIN tells Refresh (5 or higher) from non-Refresh (4 or lower), which settles which disabler applies.
Yes. We ship wholesale and sample orders worldwide from our partners in China, with export packaging matched to the destination. Delivery time and cost are confirmed with your quotation.
Electronic modules carry a 12-month limited warranty against manufacturing defects from the date of delivery. Consumable hardware is checked before dispatch and replaced on confirmed defect. See the warranty section below.
Yes. For qualified volume orders we offer OEM packaging and branding. Tell us your packaging requirements when you request a quotation.
Policies
Electronic modules are covered for 12 months from delivery against manufacturing defects. Consumable hardware is inspected before dispatch and replaced on confirmed defect.
Unused items in original packaging can be returned within 30 days of delivery. Contact us first so we can confirm the return address and case number.
Most fitment problems are avoidable. Send your year, make, model, engine, or the failed part's number before ordering and we will confirm the match in writing.
Phone and WeChat on the same number, China Standard Time (UTC+8). Technical questions are answered within one business day.
Include your product, vehicle or equipment details, and photos if relevant. Quotations and wholesale questions can use the contact form.
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