When a jack motor fails on your Ground Control 3.0 automatic leveling system, you do not need to replace the entire jack assembly. The Lippert 343758 is the correct Hall Effect motor for GC3.0 systems, letting you swap just the motor and get back on level ground fast. Works at any jack position -- front, rear, driver side, or passenger side -- so you only need to stock one part number for the whole system.
The Lippert Ground Control 3.0 leveling system uses Hall Effect feedback technology to give the controller precise position data from each jack. That feedback loop is built into the motor itself, which is why a standard aftermarket motor will not work as a direct replacement -- you need the correct Hall Effect motor to maintain system communication and auto-level functionality.
Part number 343758 (Lippert vendor cross-reference 72-6140) is the OEM-matched replacement for GC3.0 systems originally equipped with jack assemblies LC358590 and LC675817. The motor mounts directly to the existing jack leg and hardware -- no modifications, no new brackets, no re-wiring the leg itself.
Maintains position sensing communication with the GC3.0 controller for accurate auto-leveling cycles.
One part number fits front, rear, driver-side, and passenger-side jack positions on compatible systems.
Reuse the existing jack leg and hardware -- no need to replace the full jack assembly to restore function.
6.69 x 7.25 in footprint with a 7.5 in integrated wiring harness ready to connect to the existing system harness.
Lippert Ground Control 3.0 (GC3.0) is an automatic electric leveling system used on a wide range of fifth wheels and travel trailers. The system uses individual electric jack motors at each corner, monitored by Hall Effect sensors that report motor rotation to a central controller. This feedback allows the controller to extend and retract each jack independently to achieve a level coach without manual input.
Because the sensor is integral to the motor, replacing a failed GC3.0 motor requires a Hall Effect-equipped unit -- not a generic leveling jack motor. Using the wrong motor type will cause the controller to lose position feedback on that corner, resulting in fault codes or incomplete leveling cycles.
In most cases, mechanical failure in a GC3.0 jack is isolated to the motor. The jack leg, mounting hardware, and wiring harness connector remain serviceable. This motor-only replacement lets you target the failed component directly, avoiding the labor and cost of swapping out an entire jack assembly.
This motor is designed specifically for the following Lippert jack assemblies:
If you are unsure which jack assembly is installed on your coach, check the label on the jack leg body or reference your coach build sheet. The GC3.0 controller label and the Lippert chassis tag will also confirm the leveling system generation.
Lippert has produced multiple generations of automatic leveling: Ground Control, Ground Control 2.0, Ground Control 3.0, and Ground Control TT. Motors are not interchangeable between generations. The 343758 is specific to Ground Control 3.0. Verify your system model number on the controller box before purchasing a replacement motor.
Motor replacement on a GC3.0 jack is a mechanical procedure that most experienced DIY RV owners can complete with basic hand tools. General steps include:
After installing a new Hall Effect motor, perform a full system calibration or "jacks down" reset cycle using the GC3.0 controller. This re-establishes the position baseline for the replaced corner and prevents leveling errors or fault codes on first use.
This listing is for the motor only. The jack leg, mounting hardware, gearbox, and wiring harness extension are not included. Reuse your existing components. If your jack leg or gearbox housing is damaged, a full jack assembly replacement may be required.
Common signs that a GC3.0 jack motor needs replacement include: one jack not responding during auto-level, a fault code on that corner's circuit, the jack extending or retracting manually but not under power, or a grinding/no-movement condition with power applied. Confirm 12V supply to the motor connector before ordering to rule out a wiring or controller issue.