2020 Corvette: Service Bulletin: #PIP5752F: Service Engine Light Misfire Engine Noise With DTC P0300 P0106 P0506 - (Oct 28, 2020)

#PIP5752F: Service Engine Light Misfire Engine Noise With DTC P0300 P0106 P0506 - (Oct 28, 2020)

Note: If you suspect you have a valve spring concern please contact Technical Assistance at (866) 960-6006 (after providing your case number, please select prompt one for engine Drivability then, prompt one for gasoline engines) TAC will assist with issue verification and expediting parts. In Canada, contact the Canadian Technical Assistance Centre at the number you have been provided.

Correction

During inspection if you determine that the engine has a broken valve spring it will be necessary to perform a cylinder leakage test on the affected cylinder.

If no cylinder leakage is observed and the vehicle is built between June 1, 2020 to October 7, 2020:

• For engines with  RPOs L82, L84 and L8T replace the affected valve spring, if the vehicle is built between June 1, 2020 to October 7, 2020.
• For 6.2L engines RPOs L87, LT1, LT4 and LT2 It will be necessary to replace all valve springs on both banks if the vehicle is built between June 1, 2020 to October 7, 2020.

Note: Brand Quality has placed the following Part number for 2020, 2021  6.2L L87, LT1, LT2, LT4 valve springs on a Technical Assistance Center part restriction

P/N 12691120 - 6.2L L87, LT1, LT2, LT4

Please add any pictures of the concern to the case that will help with the diagnostics. 

Check for a damaged intake manifold runner for the cylinder with the concern.  

00-06-01-026M: Engine Replacement After Severe Internal Engine Damage -Replace Intake Manifold

If you determine that engine has cylinder leakage it will be necessary to inspect further to determine the extent of the engine damage to determine correct repair required;

• For 6.2L engines RPOs L87, LT1, LT4 and LT2 that has engine damage please follow PIP5759 for engine restriction.  

Important: All valve springs will be requested back for further analysis and inspection.

Warranty Information

For vehicles repaired under the Powertrain coverage, use published labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. 

Version	7
Modified	09/08/2020 - Created on. 09/21/2020 - Updated to add 2020 Chevrolet Camaro and edit the correction statement 10/13/2020 - Updated Model Years. 10/13/2020 - Updated Model Years. 10/16/2020 - Updated to add Admin. Details 10/21/2020 - Updated to add contact Technical assistance 10/23/2020 - Updated to add Valve Spring Part Restriction. 10/28/2020 - Updated to add MY 2021 for T1XX Pick up