GM tried to sell the heavy truck operation, including the Flint Michigan plant to Isuzu (with whom they had a longstanding relationship) and Navistar, without success, and the last truck was built July 31, 2009.
Since then there has been talk off and on that they might re-enter production, but only in the 5-6 or 7 categories.
Therefore the Canadian Broadcasting Corporation's GMC C8500 audio mobile truck with Isuzu diesel engine may symbolize the end of the line.
For a time GM had a stake in Isuzu of up to 49%, but that diminished, and Isuzu (and its car making branch Suzuki) backed out of the US, and instead concentrated on building engines.
When GM first introduced their new class 6-8 trucks in 2003, the class 8 came in 16 different wheelbase options, with several engine choices from Cat, Isuzu and others. The largest, with a 296 inch, single axle, wheelbase could accommodate a 96 inch wide x 30 foot long body.
CBC has 19 trucks across the country of which 8 are audio mobile:
GMC often lead the pack in making trucks more civilized looking (as compared to say Peterbilt of Kenworth) and so this truck may represent the epitome of that styling.