Having problems with your 2003 GMC Sonoma Extended Cab ?
How to reset the check engine light - 2003 GMC Sonoma Extended Cab
You need an OBII scanner to reset engine light. Have scanned and pull codes to identify what triggered light. Any good shop or parts store can do it for you.
You need a scanning tool get to codes menu and then to clear codes.\012if you can't get one try disconnecting battery for a few minutes but this mat activate security an lock the radio.
Repair Help & Product Troubleshooting for 2003 GMC Sonoma Extended Cab
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