The diesel version of the Hilux with a "G" typically indicates a 2.8-liter engine displacement.

The Diesel Hilux comes with two engine displacements: one is a 2.4-liter four-cylinder, and the other is a 2.8-liter turbocharged four-cylinder.

Generally, those with this letter have a 2.7-liter engine, while those without it typically have a 4.0-liter engine.