Hello. my name is Glen and I have a 2001 GMC Safari van 4.3l 2w/d. i am looking for advice on a DTC 200 problem i'm having, and would like to know if i'm looking in the right place for a solution to my problem. It is a California vehicle and has California emission equipment and it had other DTC codes that i have did repairs to clear those up issues, but it seems like when the codes are cleared something new comes up and they seem unrelated to previous codes. If you think you can help I have more details and information I've been keeping track to help. Thank's for your time. Glen