Reviews for GMC Sierra 2500 HD years:
2001 GMC Sierra 2500 HD Reviews and Owner Comments
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2001 GMC Sierra 2500 HDVisitor, Rockaway Beach, MO, November 22, 2010 21:05I bought this truck in August 2001 with 5,500 miles. Now has 152,000 miles. Engine is 8.1 liter with Allison 5speed. Don't think I'll ever part with it. Gets about 14-15mpg empty if driven sensibly, and about 10mpg pulling my 35' 5th Wheel that empty weight is 12,500#. And this truck is a 4x4. With exception of a couple minor sensor issues, It has performed flawlessly.