The truck has been doing very well, no issues to speak of. Performed my second oil change (Rotella 15W/40) yesterday (First at 2500 miles) and replaced the fuel filter (WIX), a bit premature, but that's OK. Question: I have been doing some serious highway mileage after the initial break in period and pushed the truck pretty hard one time to see what it has. Is the top speed limtited after 90 to 95 MPH? Thanks in advance.

Jet Wrench

Yes, GM has programmed a speed limit of 97 mph into the computer. Your speedometer may display a lower speed since it is off.

18.7 mpg i wouldn't know):h i'm going at least 85mph on the highway:ro) 50mph on the road.:ro) only problem i have is when im stopping my tranny downs shift from 2nd to 1st hard. i gotta get it checked out:mad: