GMC transmission fluid capacity and fluid specs

Transmission, brake fluid and gear oil specs for 5 GMC models. Pick a model, then the year.

Models

Source: World's Best Oil (AMSOIL dealer cross-reference). Capacities are total system fills; a drain-and-refill takes less. Where no fluid specification is shown, the source lists only a catalog code, so use the specification printed in your owner's manual - the wrong transmission fluid damages a transmission.