Complete travel-trailer system with modified tongue jack and four C-jacks. Lippert lists the kit as five-point, up to 10,000-lb trailer GVWR.
View matching part numberLippert Ground Control TT Travel Trailer Leveling Parts Diagram & OEM Reference
This Lippert Ground Control TT parts guide covers the automatic electric travel-trailer leveling system, including the five-point 672136 aftermarket kit. It is not the Ground Control 3.0 system used on fifth-wheel trailers. Identify the factory labels and installed control generation before ordering; Lippert made different LCD, OneControl and controller-color configurations.
Original illustrated factory parts lists
Lippert's Ground Control TT LCD component manual CCD-0001756 has the common-components drawing on printed page 12 and separate configurations on pages 13–18. The official support pages also contain service drawings for OneControl configurations. Select the correct controller color and touchpad model instead of treating every TT variant as identical.
Lippert original LCD exploded/illustrated component diagrams and service manuals
Lippert original OneControl TT diagrams and manuals
The yellow-controller illustration and part photographs below help identify components by their original Lippert numbers.
Actual Lippert factory-illustrated parts drawing — yellow configuration
Lippert's yellow-configuration component illustration. Check your controller label before using these part numbers.
Five-point travel-trailer layout
Modified powered tongue jack 421366 supports hitch-height adjustments and participates in the auto-level sequence.
Two frame-mounted 26-inch 404488 C-jacks. Verify the installed jack, mounting frame and sensor harness.
Two additional 404488 C-jacks. Front and rear harnesses have different identifiers and connectors.
Controller, panel, jack harnesses and front/rear leveling sensors. Part numbers vary between LCD and OneControl generations.
Other Ground Control TT components
Use these part numbers to identify the installed components. Controller and harness numbers vary by system generation.
Modified power tongue jack at the coupler
Four 26-inch TT electric C-jacks mounted to the trailer frame
Emergency manual crank handle
Yellow configuration controller; other configurations use different controllers
LCD touchpad in applicable TT systems
Right rear / left rear Hall Effect jack sensor harnesses
Right front / left front Hall Effect jack sensor harnesses
External leveling sensor (two in some kits)
Adjustable footpad assembly
Complete TT automatic leveling kit
Actual jack hardware and foot components
Factory TT callout A. Power tongue jack at the hitch end; it is not one of the four corner C-jacks.
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Factory C-jack assembly, four in the 672136 kit; includes a powered jack body. Verify the mounting bracket and drive style against the original.
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Shown in the manufacturer's common-components listing as adjustable footpad callout J. Verify the retaining pin, foot profile and installed assembly.
View matching part numberLCD, controller and touchpad variants
421483 is identified in Lippert's yellow-controller TT parts reference. 421484 is the LCD touchpad listed in the common components manual; 425306 is a different quick-level control touchpad. Match the actual control interface and production configuration before ordering, and do not treat these three as interchangeable.
TT LCD yellow-configuration control module shown in the OEM parts illustrations. Confirm your control-box color, label and harness ports.
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Factory common-components callout I for LCD configurations. Identify the original panel, connector and controller revision before replacement.
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Different quick-level touchpad used with applicable TT control versions; do not assume it replaces the 421484 LCD display or a OneControl touchscreen.
View matching part numberOther Ground Control TT harnesses, sensors and controllers
305115 right rear · 306298 left rear · 307489 right front · 307490 left front. Match each harness to its jack location, connector and installed controller; a right-side harness should not be chosen by length alone.
423094 leveling sensor, 434431 15-foot front sensor harness, 243688 35-foot rear sensor harness, 426526 power/ground supply and 421372 tongue-jack harness.
Lippert part 433633 is a OneControl travel-trailer leveling controller, while 421483 serves the Ground Control TT configuration shown in the yellow-controller drawing. Match your control-board number and connectors before replacing either unit.
Before you order
- Confirm that the installed system is Ground Control TT, not fifth-wheel Ground Control 3.0 or another leveling family.
- Photograph each jack label and the existing control-box label, including its connector and color.
- Compare OEM component diagrams for LCD versus OneControl and the correct configuration color.
- Use the exact manufacturer part number and check related harness and mounting details.
Leveling safety: Never lift a trailer completely off its wheels or work under a trailer supported only by leveling jacks. Follow Lippert's operating and manual-override procedures and keep people clear while operating the system.
Shop related products: RV jacks and leveling equipment · Lippert parts and accessories.
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