The Sierra 3500 was built by GMC.
Sierra 3500 answers
When did GMC stop making the Sierra 3500?
GMC stopped production on the Sierra 3500 in the 2006 model year. GMC produced the Sierra 3500 for 18 years.
What years did GMC make the Sierra 3500?
The GMC Sierra 3500 was produced from 1988 to 2006.