#PIP5752A:

Subject: Service Engine Light misfire engine noise With DTC P0300 P0106 P0506

Involved Region or Country North America

Condition

A Vehicle may have a concern of service engine light, misfire and engine noise with possible of DTC P0300 P0106 P0506.

Cause

Possible broken valve spring.
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 it will be necessary to replace all valve springs on both banks if the vehicle is built between June 1, 2020 to September 15, 2020.
Note:
This only applies to the 6.2L engines RPOs L87, LT1, LT4 and LT2.
For all other engine RPOs L82, L84 and L8T just replace the affected valve spring.

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.

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

The breakage of valve springs for the LT2 is causing not just head issues but bad enough to cause internals to blow the hell out of the block
requiring a whole engine change

Verify via both websites, enter your VIN # and determine if and what GM and federal recall database shows related to your vehicle and
if you need to contact your dealer and demand recalls be applied.

Federal Recall Database

and

GM's Recall by VIN #

GM's Recall by VIN #