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1991 Corvette: Service Bulletin: LTPWS Parts Numbers and Sensor Color Codes Revised

Subject:   LTPWS Parts Numbers and Sensor Color Codes Revised Model and Year:   1991 Corvette Source:  Chevrolet Service Update Bulletin Bulletin No:   91-418-3E Section:   3E Date:    Sept.... Read More

1990 - 1996 Corvette: HVAC Diagnostic Codes

On 1990 to 1996 Corvettes equipped with RPO C68 (electronic climate control), it is possible to read the HVAC system diagnostic codes from the climate control panel on the dashboard. To enter the diagnostic mode, press the fan up and down arrow... Read More

1984 Corvette: ECM Codes

Code #12:  Normal System No Codes.Code #13:  Oxygen Sensor Circuit.Code #14:  Coolant Sensor Circuit Low.Code #15:  Coolant Sensor Circuit High.Code #21:  Throttle Position Sensor High.Code #22:  Throttle Position Sensor... Read More

1985 - 1991 Corvette: ECM Codes

Code #12: Normal No Codes.Code #13: Open Oxygen Sensor Circuit.Code #14: Coolant Sensor Circuit Low.Code #15: Coolant Sensor Circuit High.Code #21: Throttle Position Sensor High.Code #22: Throttle Position Sensor Low.Code #23: Manifold Air... Read More

1990 Corvette: Service Bulletin: SIR Diagnostics and Procedures to Prevent Codes 16 and 26 Due to Corrosion Revised

Subject: SERVICE MAN. UPDATE SEC.9J A/B REV. SIR DIAGNOSTIC PROCEDURE Model and Year: 1990 CORVETTE Source: Chevrolet Service Bulletin Bulletin Number: 90-436-9J - (11/07/1991) Some 1990 Corvettes have set SIR Sensor Codes 16 and 26. The... Read More

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