For context, this sounds like they're pausing production for the "body on battery" BT1 platform for their largest electric trucks (the Hummer and Silverado).
Their much more popular "skateboard" BEV3 platform is still selling at pretty good numbers with the Chevy Blazer and Equinox EVs, the Cadillac Lyriq/Optiq/Vistiq EVs, and the Honda Prologue EV and the last of the now-discontinued Acura ZDX badged with those brands (but ultimately running the same GM platform underneath). Plus the BEVII platform should be selling well again with the relaunch of the Chevy Bolt this year (after a 2 year hiatus).
Customer rejection of the largest electric pickup trucks shouldn't be seen as a long term failure of EVs in the American market, and shouldn't even be understood as a failure of GM's ability to compete in the EV market. They're selling over 150,000 EVs per year, and have a continued pipeline of new EVs coming, which is a lot more than most manufacturers can say (even including the traditional manufacturers that embraced EVs early, like VW and Hyundai and Nissan).