[BlazerLT]

Hold on their, please learn to edit your posts instead of adding a new post for one statement. Makes things confusing.

Please remove and check your EGR valve again and MAKE SURE that there is no carbon chunks sticking the pintle open.

Do not just ASSUME that it is fine because the valve was replaced. New carbon can be dislodged and this could happen several times.

Check it out and get back to us.