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Garmin GI 275 CDI / MFD 3-1/4 Inch Base Kit FAA STC

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Part# 11-17861
MFR Model# 010-02325-00


The GI 275 Base variant can be utilized as a CDI/MFD with features such as traffic, weather, terrain, SafeTaxi® airport diagrams, and more. When installed as a CDI, the GI 275 flight instrument, when paired with select VHF Nav radios or GPS navigators, can serve as your primary indicator for making, adjusting and tracking course selections. It is designed to accept a variety of GPS or navigation inputs, allowing up to two GPS sources and two VHF navigation sources. The GI 275 features an Omni Bearing Resolver that allows the flight instrument to interface to a variety of legacy navigation sources without the need for an expensive adapter. CDI source selection can be accomplished through the touchscreen interface, while course and heading selection is completed by using either the touchscreen or dual concentric knob. When pilots replace an older mechanical CDI, the GI 275 doubles as a modern digital indicator and adds MFD-like capabilities such as a moving map, weather, traffic and terrain.

Multifunction Display Functionality

    Depending on the configuration and installation, GI 275 is capable of displaying additional page functions and features beyond a traditional flight instrument. These features can include the following:
  • A multifunction display (MFD) with a moving map can display terrain, obstacles, traffic, weather, airspace information, airways, and more.
  • When interfaced to a GTX™ 345 or GNX™ 375, traffic information can be displayed on the dedicated traffic page or moving map. Patented TargetTrend™ relative motion technology and pop-up traffic alerts further enhance situational awareness.
  • GI 275 can also be interfaced to a variety of traffic systems, including select Traffic Advisory (TAS) and Traffic Alert and Collision Avoidance Systems (TCAS). Traffic advisories are displayed on the dedicated traffic page and moving map.
  • SafeTaxi airport diagrams display runways, taxiways, Fixed Based Operators (FBO’s), hangars and more relative to the aircraft’s location on the airport surface.
  • Terrain shading incorporates yellow and red contouring indicating that the aircraft is 1,000 and 100 feet above ground level (AGL) respectively. Terrain information — as well as obstacle and WireAware™ database information — can be viewed on the terrain and map pages.
  • GI 275 uses its internal terrain and obstacle database to provide audible and visual terrain proximity alerts, including, “terrain ahead, pull up” and “obstacle ahead, pull up.”
  • When paired with the GDL® 69 datalink receiver, GI 275 is capable of displaying SiriusXM® Aviation Weather. It can also display Flight Information Service-Broadcast (FIS-B) weather from either a GTX™ 345 or GNX 375.
  • An airport information page displays a variety of information, including frequencies, runway dimensions and more.
  • GI 275 can be paired with the GRATM 55 or GRA 5500 radar altimeters — as well as other third-party products — to display radar altimeter readings on a dedicated page. Visual and aural annunciations are also available.
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -


  • Width: 3.25" (82.6 mm)
  • Height: 3.25" (82.6 mm)
  • Depth: 6.44" (163.6 mm)
  • Depth with Connector: 7.40" (188.0 mm)
  • Unit Weight: 1.9 lbs (0.86 kg) to 2.4 lbs (1.1 kg)
  • Active Display Size: 2.69” diameter
  • Display Resolution: 480 x 433 pixels
  • Operating Voltage: 14/28 VDC
  • Operating Temperature Range: -20°C to +55°C
  • Altitude Range: -1,500 ft to 55,000 ft
  • Wi-Fi Class: 802.11b/g/n


Interface Manufacturer Model Notes/Info
GPS Source Garmin Internal VFR GPS
GNS 430W/530W Series
GNS 480
GTN 650/750 Series
GTN 650Xi/750Xi Series
GTX 335/345 Requires Integrated GPS Variant
GPS 175/GNC 355/GNX 375
Database Updating Garmin GSB 15
Garmin Pilot App
Navigation Receiver Garmin GNC 255
GNS 430W/430AWGNS 530W/530AW
GNS 480 (CNX80)
GTN 650/750
GTN 650Xi/750Xi
SL 30
Collins VIR-32/33
Honeywell (Bendix/King) KX 155/155A/165/165A
KN 53
KX 170B/175B
Radar Altimeter Garmin GRA 55/5500
Collins RAC-870
FreeFlight RA-4500
Honeywell (Bendix/King) KRA 405B
Traffic Source Garmin GTS 800/820/825/850/855
GTX 33/330/335 TIS-A Only
GTX 345
GNX 375
Avidyne (Ryan) TAS 6XX/TCAD
Honeywell(Bendix/King) KTA870/KMH820
L-3 Communications(Goodrich) SKY497
Weather Source Garmin GDL 69A GTN Series, GTN Xi series or TXi Series must also be connected
GTX 345
GNX 375
L-3 Communications WX-500 Stormscope GTN Series, GTN Xi series or TXi Series must also be connected
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Please note, Aircraft Spruce'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 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: Is the Garmin GI 275 certified for class III aircraft?

Although there is a version that is approved for CLASS III aircraft. This particular part number, part # 11-17861, is not.

Q: Are you going to post the Install Manual?

Per Garmin: The installation manual can be released after the purchase of the unit. You can send your request to after completing the sale.

Q: No KLN90B interface (ARINC? 422?)

The list of applicable interfaces is posted on the web page. The KLN90B is not a compatible unit.

Q: Which GMUs are compatible with the GI 275 for the HSI display function?

Per Installation Manual Rev3/Pag 1-5: The GMU 11 is compatible with the GI 275.

Q: Will this GI 275 work with STEC 30 or 50 autopilots?

Yes, per the Manufacturer installation manual Rev 1 , Page C-11 this unit is compatible with the STEC 30 and 50.

Q: Does the GI-275 have to be installed by a Garmin dealer or can my shop install this unit?

Versions of the GI 275 that we sell are able to be installed by an A&P or Avionics Installer. Other versions will require a Garmin Installer. This CDI / MFD model and the EIS models can be installed by an A&P.

Q: Can the GI 275 CDI / MFD base version be combined with GAD29 to have the HSI function?

Simply adding the magnetometer does not made it the HSI version. As it must be programmed by the manufacturer to include the internal ADAHRS. However, the magnetometer will be needed when purchasing that configuration.

Q: Does the GI-275 provide required annunciator function for 430W installations?

Per Garmin, it will not provide annunciations for the GNS430W.

Q: Glideslope - ILS Source this will only work with antenna p/n 11-17931 or 11-15700? i want to landing on ILS APPROACH. What do I need for this?

The GI275 only accepts a backup GPS antenna.

Q: Can a GAD29B be added to this GI 275 unit to support Century IIB autopilots?

This version of the unit does not have support for interconnection to an Autopilot.

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