2016 - 2018 Corvette: Service Bulletin: #20-NA-207: Information on Malfunction Indicator Lamp (MIL) Illuminated - DTC P0333 Set - (Oct 6, 2020)

Cadillac

CTS-V

2016

2018

All

All

6.2L (LT4)

All

Escalade

2015

2018

All

All

6.2L (L86)

All

Chevrolet

Camaro

2016

2018

All

All

6.2L (LT1, LT4)

All

Corvette

2016

2018

All

All

6.2L (LT1, LT4, LT5)

All

Silverado

2014

2018

All

All

4.3L, 5.3L, 6.2L (L83, L8B, L86, LV1, LV3)

All

Suburban

2015

2019

All

All

5.3L (L83)

All

Tahoe

2015

2019

All

All

5.3L (L83)

All

GMC

Sierra

2014

2018

All

All

4.3L, 5.3L, 6.2L (L83, L86, LV1, LV3)

All

Yukon Models

2015

2018

All

All

5.3L, 6.2L (L83, L86)

All

Involved Region or Country

North America, Europe, Russia, Middle East, Israel, Chile, Colombia, Ecuador, Venezuela, Japan, GM Korea Company, China, Taiwan, Thailand, Singapore, Philippines, Other Africa

Condition

Some customers may comment that the MIL is illuminated when shifting the transmission from Park.

Some technicians may find DTC P0333 (Knock Sensor Circuit High Voltage Bank 2) set in the Engine Control Module (ECM).

Cause

DTC P0333 can set due to voltage from the transmission park/neutral signal 1 circuit bleeding into the knock sensor system circuits.

Correction

To correct this condition, follow service information for diagnostic code P0333. If service information does not isolate the concern, then inspect the K20 ECM X2 electrical connector for debris, connector and/or terminal concerns. 

Version

1

Modified

Released October 06, 2020