1998 Blazer 6 cyl I have the carMD and plug it in to see what may be causing a random condition when starting off from a stop it feels like starving for gas or tranny slip but after a few jerks clears up and may only do it 1x a day or a few times a day. I will try inserting an image below, not sure if the code P1875 is just the 4WD sensor that could cause this random bucking from a stop or if the PCM needs coded or something else.
Any suggestions from others that may of had a similar problem is appreciated.
If image don't display here is a link to it
http://screencast.com/t/rDKeNMxUh

 

Anyone have suggestions?

http://screencast.com/t/rDKeNMxUh

 

I recently learned that a weak alternator can cause the problems your are describing. Check to see what kind of voltage you are getting but don't rely on the voltmeter on the dash.

 

Thanks AJBert I will check it, but believe it is ok.
In the process changing the inline fuel filter, had a lot of restriction blowing into the old one compared to the new.
Vehicle in December wouldn't start, turned out the rotor was shot arching so it was replaced.