That is a GM B body, 1st generation. Major face lift in 1991 IIRC.
Last built in 1996. Full framed, V8, 6 or 9 passengers, RWD. . Came as
a 2 dr, 4 dr or wagon. Sold as Chevys, Pontiac, Olds, Buick & Cadillac.
They all look near the same. I had 4 of them over the years.
The last REAL cars GM made. Known for long life, low cost & ease of
repairs. They get up to 25 MPG on the highway. Not bad considering
the size ( over 2 tons ) & vesitility.
BTW that may be a diesel, a disaster......
73 Zeno
LFOD !