P1680 GMC - Control Module Not Programmed
- Engine Control Module (ECM) program error
- Wrong Engine Control Module (ECM)
- Faulty Engine Control Module (ECM)
This code means that there may be an internal problem with the Engine Control Module (ECM). Start by checking battery charge and connections. Try clearing the code and re test.
- Engine Light ON (or Service Engine Soon Warning Light)
P1680 GMC Description
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