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supertech, mastertech
Category: Car
Satisfied Customers: 2251
Experience:  ase master auto tech,triple chrys master tech,42 yr experinece,adv. level spec. ASE. HEV chrys spec.
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2003 envoy xl: check engine..gas cap off and the light came on..4x4

Resolved Question:

I would like to know how to reset the check engine light.Somebody left the gas cap off and the light came on. I have a 2003 envoy xl, 5.3 engine 4x4.
Submitted: 8 years ago.
Category: Car
Expert:  supertech replied 8 years ago.

Hi my name is John.


You disconnect the postive battery and wait 10 min,than hook up the postive cable and turn the key on.


Let me know if you need more.


Please push the accept button when were done.


Thank you for choosing just naswer.

Customer: replied 8 years ago.
I disconnectd the + cable for 10 min. and connected the cable. The light is still on.
Expert:  supertech replied 8 years ago.

Did the light come back on because there is still a problem.


That how you reset the main computer.

Expert:  supertech replied 8 years ago.
It sound like you have an active code you will need to have some one read it.
Customer: replied 8 years ago.
I only have 13000 hi-way miles on the vehicle and the light was not on before I discovered the gas cap off.Would the light come on if it was due for an oil change? I change oil at 9500.
Expert:  supertech replied 8 years ago.

If the gas cap was off it will set a code.


the code will go away after you start an drive the car like some where between 3-40 times on it own if that all is wrong.


This should have clear that code.


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