The truck came with an older radio in it. Cassette. No CD or auxiliary inputs. It needed changed.
I had a double-DIN radio in my Ford Superduty but the auxiliary connections interfered with drinks in the cupholder. I bought a new radio for the Ford and handed the old radio down to the Volvo.
Volvo makes a double-DIN bracket but I was unable to find one anywhere. I ended up modifying the existing factory bracket and bolting the radio directly to the bracket. It wasn't a big job. The new radio sounds much better.