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Chevy Silverado and GMC Sierra Electrical and Computer Questions
I have a 2000 4WD Chevy Silverado with the 5.3 V8 with 49,000 miles. Today when I was headed home from work I noticed that Service Engine Light was on. I headed to the auto parts store to use their scan tool. I pulled out code P0440 “Evaporative Emission Control System Malfunction”
After a little research I found that it might have been caused by the fact the gas cap was not all the way tight. Is this true? Also will the MIL reset itself if the problem is gone?
What else could set a code P0440?
Thank you so much!