Simply replace them. Make sure the pitman arm is bad before replacing it.
For non fuel injected models, on the side of the carburetor there is an idle screw. Turning the screw slightly will raise the idle on your Chevy truck.
vacuum leak?
check the ait. on yhe left side of carb..it control's idle.
it has a low idle. Can also be a vacuum hose leak.
1500 at first until it kicks down to 850 rpm
No it will not. It only controlls the idle of the engine.
A 95 does not have a idle air tempture sensor, It was not used on that year, no need for one.
While the truck is running in idle pull out the dip stick and read it.
factory spec. is around 25 to35 psi
I'd start by checking for vacuum leaks.
That engine is computer controlled therefore the idle was preset / calibrated from the factory and there is NO adjustment. You need to have the engine scaned with an engine scanner to see what is making it Idle to fast. Check for vacuum leaks first.
Either you were low on gas, you need a transmission check, or the fuel pump may be going out.