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Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1685
Experience:  GM Grand Master Technician 2007. 14 year experience.
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It's a 2004 yukon, 5.3l engine, check engine light was on,

Customer Question

It's a 2004 yukon, 5.3l engine, check engine light was on, replaced gas cap and it went off for about 3 days, then came back on... Any idea of how troubleshoot?
JA: Does the light stay on, or does it blink?
Customer: It stays on. It was off, but just came back on a few minutes ago
JA: Are you fixing your Yukon yourself? What have you tried so far?
Customer: Tried nothing, an inspection place told me the issue should be gas cap, changed it and the light went off within an hour, but now, 3 days later it just came back on
JA: Anything else you want the mechanic to know before I connect you?
Customer: No
Submitted: 7 months ago.
Category: GMC
Expert:  Edward replied 7 months ago.

Hello, and thanks for your question, my name is ***** ***** I will do all I can to help.

Expert:  Edward replied 7 months ago.

Do you have an OBD II code reader by chance? I would like to know what code is stored in the Engine computer.