While messing with GDS2 v17 noticed there is a now an additional Serial Data Gateway Module populated in the software for the 2017 Bolt & 2018 Volt pictured above.
This module isn't listed in GDS2 for 2017 Gen2 Volt or older models.
With my interest piqued, dug deeper to find a couple of random VINs for 2017 Bolt (1G1FX6S00H4168093) & 2018 Volt (1G1RB6S59JU118502)
Plugging these VINs in over at https://tis2web.service.gm.com/tis2web/ reveals this K56 Serial Data Gateway Module could potentially be used to perform OTA programming on MY2018 Volts and 2017 Bolts!
Could it also be possible to disable any future OTA programming by simply pulling this 'gateway' module fuse if this is in fact the proper module shown in the Bolt Owner's fuse block pic or would this latch a corresponding DTC/CEL if removed?