Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1999 Chevrolet Corvette 2D Convertible, AutomaticFACTORY OEM SERVICE PROCEDURE
Programming Procedure
NOTE:
When programming procedure is performed, DTC P1631 will set (this is normal). When DTC P1631 sets, turn ignition off for 30 seconds, then turn ignition on. DTC P1631 should clear. If DTC P1631 does not clear, go to POWERTRAIN ON-BOARD DIAGNOSTICS (OBD) SYSTEM CHECK under SELF-DIAGNOSTICS SYSTEM in SELF-DIAGNOSTICS - GASOLINE - EXCEPT METRO, PRIZM & TRACKER article in ENGINE PERFORMANCE.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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