I recently bought an 06 gmc lly with a 6 speed manual tranny. When i get up to around 75-80 mph the rpms are up around 2200-2300 and the service engine light comes on. At this point you cant go any faster....sounds like the thing is going to blow up. Whats the deal?
Yep thats what it is. Go ahead and clear it. If it comes back on the EGR is probably stuck closed, it's happend to a couple trucks... Most people block the EGR off anyway and I suggest you do the same. Its a good idea to block it off.