I know my Cavalier had a fuel shutoff based on RPM’s, but I don’t know if my 2001 Silverado with the 4.3 Liter V6 does. I don’t want to try to find in, in the event that it doesn’t. It sure would be nice to know how close of an eye I need to keep on that needle in ice and rain.
Also, if it does, do you know what RPM it kicks in at?
I know if anyone has the answer you guys do.
Sorry I can’t give you the definite, “in the know” answer, but in my experience, any modern fuel-injected mass-market vehicle always has redline protection, i.e., the engine computers will eliminate spark or fuel-flow to ensure the engine doesn’t redline and self-destruct.
You could try this: wait for your engine to get fully warm, better yet, take it for a drive. When you get pack, put it in neutral or park, and press on the accelerator until you’re on the verge of redlining. Then give it a little more gas, and see what happens.
FWIW, GM vehicles typically also have speed limiters independant of the engine RPM. The Malibu/Cutlass, for example, won’t go faster than 180k/h. The Suburban tops out at 200k/h. These two I know from personal experimentation 
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Just put this in to get emailed. I forgot to do that in my original post.