The other day i started my pickup a 2002 GMC Sonoma Zr2 and at idle or even a constant rpm it starts shaking when at a differing rpm it does not shake that i can tell. Any ideas? I checked the spark plug wires, did a tune up a few weeks ago(oil, oil filter, fuel filter, checked all fluids) and that didn't change anything so please if you have an idea say it.

 

Do you have a black tailpipe?rich condition?

 

When was the last time you did a tune up on it? A visual check of the spark plug wires doesn't always tell if they are bad.

 

i changed the oil, oil filter, and fuel filter two weeks ago

 

What about the tune up question?sounds like a mechanic in your area will be best for you, sometimes,diagnosis gets pretty involved

 

I have an idea. Provide more detail about the "pickup" u are trying to fix. What kind of UTE is it? What year, make and model? Vehicles aren't like people. They aren't atomically identical.

If you document what you did to this point to try to fix the problem that would help.