Audio system, 4.2 inch diagonal color display with IntelliLink, AM/FM stereo, USB ports, auxiliary jack, SD card slot, Bluetooth audio, voice recognition

Years 2014–16 Models 3 Factory citations 4

Also described as Audio system, 4.2 inch diagonal color display, IntelliLink, AM/FM stereo, USB ports, auxiliary jack, BluetoothAudio system, 4.2 inch diagonal color display with IntelliLink, AM/FM stereo, USB ports, auxiliary jack, SD card slot, Bluetooth

Also documented for Chevrolet

Documented applications

Canyon — Second generation (GMT31XX) (2015–2022)

2015–2016 Factory-verified

Canyon: O; SL, SLE, SLT: not offered; includes UE1 and VV4

GM factory document — 2015 gmc canyon fleet order guide wayback, p.2.
GM factory document — 2016 gmc canyon fleet order guide wayback, p.5.

Sierra HD — K2XX (2015–2019)

2015 Factory-verified

includes OnStar (UE1), CD player (TG5) and 4G LTE Wi-Fi (VV4); Sierra: O; SLE, SLT: not offered

GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.

Sierra — K2XX (2014–2019)

2014 Factory-verified

the code is written with the letter O in GM's lists; the Silverado K2XX doc reads Chevrolet MyLink.

GM factory document — 2014 gmc sierra 1500 fleet order guide wayback, p.2.

This page aggregates every documented appearance of IO4 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.