light came on checked the code it was a co442
JA: Do you happen to have a code reader or scan tool? What size is your engine
Customer: yes I have a code reader I have a 6.2
JA: Tell me a bit more about what's going on so he can help you best.
Customer: idle a little rough
JA: Are you hoping to fix this yourself?
Customer: yes if I can do it
JA: Great! What have you tried so far?
Customer: nothing im tying to find how to fix it
JA: Is there anything else the GMC Mechanic should be aware of about your GMC?
Customer: no that's the only code I have 118000 on it
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the GMC Mechanic about your situation and then connect you two.