The fastest speed allowed on the freeway is irrelevant, I was hanging about 80-85 MPH when I got boxed in and the semi-truck on my right started to move into my lane I could not back off due to the 2-semis behind me trying to pass the slow one I was trying to pass which is why the only safe location was the meridian. The speed I drive is none of GM's business but mine anyway and GM has clearly been misleading with a speedometer that goes to 140 MPH. Had I been foretold of the top end, I might have never gotten into that situation because I would have known that it would not get-up and go when needed. 35+ years and many thousands of miles of driving GM products and I can cite many situations where acceleration well beyond the speed limit is required to avoid accidents. Gratefully the truck handles well enough that it handled the dirt meridian area very well.