The Sierra 2500 was built by GMC.
Sierra 2500 answers
When did GMC stop making the Sierra 2500?
GMC stopped production on the Sierra 2500 in the 2004 model year. GMC produced the Sierra 2500 for 16 years.
What years did GMC make the Sierra 2500?
The GMC Sierra 2500 was produced from 1988 to 2004.