GMC Expands Capabilities of 2024 Sierra 1500 AT4X April 07, 2023, 02:01:32 PM GMC Expands Capabilities of 2024 Sierra 1500 AT4X[html]First introduced on select 2023 Sierra 1500 trims, the updated 3.0L Duramax engine co*es standard with a 10-speed automatic transmission.[/html]Source: GMC Expands Capabilities of 2024 Sierra 1500 AT4X (http://ht**://www.worktruckonline.c**/10196504/gmc-expands-capabilities-of-2024-sierra-1500-at4x) Quote Selected