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2020 GMC Terrain Key Fob Programming

Updated 2026 Programming, battery & replacement fob

You can program a 2020 GMC Terrain key fob yourself in a few minutes using a working key or remote, no dealer visit needed. Follow the steps below, then check the battery and the correct replacement fob (with FCC ID and part number) if you need a new one.

If your GM vehicle (Cadillac, Chevrolet, Buick) has push-button start, you can program smart keys yourself. Use Method A if you have two working smart keys; use Method B if you have one or none. Up to 8 smart keys — read the steps through first.

Before you start

  • All smart keys — working and new — with you
  • Engine off

Method A — with two working smart keys

  1. 1Remove the emergency key blade from one of the working smart keys.
  2. 2Place both working smart keys in the cupholder.
  3. 3Insert the emergency key blade into the driver's-door lock cylinder and turn it counterclockwise to unlock five times within 10 seconds. (On some vehicles you'll first pop off the lock-cylinder cap on the door handle.) The Driver Information Center shows READY FOR REMOTE #2.
  4. 4Place the new smart key in the transmitter pocket — center-console storage for Cadillac, front cupholder for Chevrolet and Buick.
  5. 5Press ENGINE START/STOP. When the key is recognized, the display is ready for the next key.
  6. 6Take the key out of the pocket and press Lock or Unlock on it.
  7. 7To add another key, repeat the last three steps. When done, press and hold ENGINE START/STOP about 12 seconds to exit.

Method B — with one or no working smart key

Takes about 30 minutes and isn't available in Canada. With no working key, have the new key's emergency blade cut by a locksmith first.

  1. 1Remove the key blade from your existing or new smart key.
  2. 2Insert it into the driver's-door lock cylinder and turn counterclockwise to unlock five times within 10 seconds. The display shows READY FOR REMOTE.
  3. 3Wait about 10 minutes until the display reads PRESS ENGINE START BUTTON TO LEARN, then press ENGINE START/STOP. The display shows REMOTE LEARN PENDING, PLEASE WAIT.
  4. 4Repeat that door-cylinder, wait, and Start/Stop sequence two more times. After the third, all previously known keys stop working and the display shows READY FOR REMOTE #1.
  5. 5Place the new smart key in the transmitter pocket — center console for Cadillac, front cupholder for Chevrolet and Buick.
  6. 6Press ENGINE START/STOP. When recognized, the display is ready for the next key.
  7. 7Take the key out and press Lock or Unlock on it.
  8. 8To add another key, repeat the last three steps. When done, press and hold ENGINE START/STOP about 12 seconds to exit.

Replacement key fob options

Match the FCC ID printed on the back of your existing fob to be sure of the right part.

3-button Remote Head Key

Find on Amazon
FCC ID
OHT01060512, V2T01060512, V2T01060514, AVL-B01T1AC, AVL-B01T2AC
OE part #
20835406, 20873621, 20934736, 5913598, 20835402, 20873623, 20934738, 5913596, 13504266

4-button Remote Head Key

Find on Amazon
FCC ID
OHT01060512, V2T01060512, V2T01060514, AVL-B01T1AC, AVL-B01T2AC
OE part #
20873620, 20835404, 5913597, 20873622, 20835400, 13504200, 13504205, 13504258 23335583, 13579248, 23465183, 13501913, 13501513, 13576139, 13500222, 13574862, 13584826, 13576144, 13576176, 13500227, 5912543, 5912547, 5912555, 5913396

5-button Remote Head Key

Find on Amazon
FCC ID
OHT01060512, V2T01060512, V2T01060514, AVL-B01T1AC, AVL-B01T2AC
OE part #
13500226, 13504204, 5912556, 13504259, 13501514, 5912548, 13574863, 13504199, 23335584, 13579228, 23465184, 13500221, 20979468, 23316207, 5912545, 5913397

Transponder Key

Find on Amazon

4-button Proximity Key

Find on Amazon
FCC ID
OHT05918179, P4O9MK74946931
OE part #
13504283, 13500318, 13586120, STRATTEC: 5912558, 5921872, 5927057

Proximity Key

Find on Amazon
FCC ID
P4O9MK74946931, OHT05918179
OE part #
13504202, 13500224, 13500319, 13584829, 13585206, 13585209, 13586785, STRATTEC: 5912559, 5921873, 5927058

5-button Proximity Key

Find on Amazon
FCC ID
P4O9MK74946931, OHT05918179
OE part #
13504202, 13500224, 13500319, 13584829, 13585206, 13585209, 13586785, STRATTEC: 5912559, 5921873, 5927058

Proximity Key

Find on Amazon
FCC ID
AVL-B01T1AC, AVL-B01T2AC, OHT01060512, V2T01060512, V2T01060514
OE part #
N, A

3-button Proximity Key

Find on Amazon
FCC ID
HYQ1AA
OE part #
13591388, STRATTEC: 5944137

3-button Proximity Key

Find on Amazon
FCC ID
HYQ1EA
OE part #
13508276, 13589149, STRATTEC: 5944136

5-button Proximity Key

Find on Amazon
FCC ID
HYQ1AA
OE part #
13584502, STRATTEC: 5944139

2020 GMC Terrain key fob battery

Your 2020 GMC Terrain key fob uses a CR2032 3V lithium coin cell. A fresh one typically lasts 3–5 years.

Find CR2032 batteries on Amazon

How to replace the battery

  1. 1 Slide the release latch and pull the metal emergency key out of the fob.
  2. 2 Use that key (or a coin) to pry the two halves apart at the seam.
  3. 3 Lift out the old coin cell — note which side faces up.
  4. 4 Drop in the new battery the same way (printed + side usually faces the back cover).
  5. 5 Press the case back together until it clicks, then test lock/unlock and push-to-start.

Battery tips

  • Use a fresh, name-brand 3V lithium cell — bargain cells drain quickly.
  • Even with a dead fob battery you can usually still start the car by holding the fob against the start button — check your owner's manual.
  • If the fob still won't work after a new battery, it may need re-syncing or programming.

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