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How thick is the rubber mat for a 2008 GMC Sierra and is it a exact fit
- Tony Neal on 12/3/2019
They are 3/8" thick and the this tailgate mat is not for the 2008 Sierra. Here is the one for the 5' 9" bed, https://www.sharptruck.com/westin-50-6155
- Admin on 12/4/2019