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Part# 11-13822
MFR Model# 010-01595-20


High-end Capability for Your G3Xô
  • Dedicated controller for advanced Garmin autopilot modes
  • Control wheel for altitude selection
  • Dedicated heading and altitude knobs
  • LVL mode button commands automatic recovery from steep or unusual attitudes
  • Allows for standalone operation of the autopilot
The GMC 307 control panel offers a dedicated interface for G3X autopilots in experimental and light sport aircraft.

When installed with G3X flight displays, GMC 307 offers features normally reserved for high-end aircraft that use the GFC 700 digital autopilot system, including advanced autopilot modes, such as indicated airspeed hold, independent flight director and third-axis yaw damper (when installed with appropriate servos). While these features are available without a separate controller on G3X Touch flight displays, installing the optional GMC 307 allows for standalone operation of the autopilot.

Plus, the control wheel integrated into the GMC 307 makes for easier pitch, vertical speed and airspeed adjustments, while separate knobs allow twist-control of heading and altitude. And for added safety, the panelís advanced LVL mode button commands automatic recovery from steep or unusual attitudes, enabling the autopilot to return your aircraft to straight-and-level flight.

Automatic flight control system limitations can prevent or delay the ESP systemís ability to recover the aircraft in some situations.
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Product is great. But Aircraft spruce sent with zero paperwork.

Ben F
June 27, 2019

Lucas S
August 7, 2018

The only reason I didn’t give this probe 5 stars was that I had to wait over 2 weeks for it to arrive...

Douglas W
October 5, 2020

This control head has been superseded by the 507, which costs the same.

Douglas M
July 1, 2019


Please note, Aircraft Spruce Canada's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce Canada assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: I have a G3X installed and I know that the G3X touch and the plain G3X system cannot comunicate but is there a way that I can use my plain GDU as just a GPS and then I connect the touch up with my excisting module's?

You would have to run the GDU 370/375 completely separate with its own GPS signal and rewire the G3X touch to be the main display with your existing LRUs.

Q: For the Garmin G3X EFIS, do I have to buy the Connector Kits if I buy the Harness kit?

Yes, you would still need to purchase the connector kit in addition to the harness.

Q: What additional connector kits and/or harnesses are needed with K10-00016-40 (single display, no EiS, no XM).

You would need the GDU 460/465 Install Kit (11-12646), GSU 25 Connector Kit (11-11433), and the GMU 22 Install Kit (11-12213).

Q: What wiring is included in the G3X VFR Harness EFIS/EMS 4CYL CON/LYC?

For the VFR harness all of the components including the engine leads are included minus connection to an auto pilot and audio panel (which have there own part numbers on our list). When ordering a G3X system, we will send you a worksheet to fill out for your unique setup.

Q: What is included in the G3X VFR EFIS?EMS harness?

As each G3X harness we create is unique, there is a form that you would fill out which will includes the features you want including and pricing.

Q: I have installed in my aircraft the GMC 305. If I order the GMC 307, can it replace the 305?

Yes, you can replace the 305 with the 307 if you'd like.

Q: What is the dimensions of the Garmin GMC 307? Is it interchangeable with the GMC305.

The units have the same size faceplate and use the exact same connector kit. The panel cutouts are slightly different. The 307 is 6.015" x 1.98" while the 305 is 5.38" x 1.73"

Q: What is the difference in 11-11433 and 11-15303?

11-11433 is the GSU 25 connector kit by itself. Part # 11-15303 is the GSU 25 connector kit with a custom harness.

Q: Does this GARMIN G3X GMC 307 AUTOPILOT CONTROL HEAD come with the connector kit?

No. See part number 11-11447 for installation/connector kit.

Q: How far behind the panel does this Garmin GMC 307 unit extend?

According to the manual the unit with the connector is about 3.43 inches not including wires.

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