The AMX's full second model year saw only slight changes. The five-spoke Magnum 500 steel road wheels were no longer chrome plated, but now came with a stainless steel trim ring.
With the success of the GTO, Buick finally decided to jump into the muscle car market and offered up an optional package to the Skylark—the Gran Sport.
The 1986 Grand National's 3.8L V6 turbo engine now produced 235 hp and 330 lb-ft of torque with the help of an intercooler and a sequential port fuel injection system.
The 1985 Grand National remained largely the same with the exception of a revised front grille. The lack of changes stood as a testament to its engineering.