TSB For Valve Springs On V8s

[Transient]

This affects both the 5.3 and 6.2, but only those built from June 1 to September 15.

 

PRESS RELEASE

 

22 SEPTEMBER 2020

 

#PIP5752A: Service Engine Light misfire engine noise With DTC P0300 P0106 P0506 - (Sep 22, 2020)

 

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.

CorrectionDuring 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.

 

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[bjr2020 6.2]

That’s special lol my custom was built in July of this yr. Where did you get this info from? Is it maybe just a certain vin range effected? My 2015 ltz 6.2 broke a intake spring and luckily i caught it before it dropped valve. So this makes me nervous.

[Transient]

That’s special lol my custom was built in July of this yr. Where did you get this info from? Is it maybe just a certain vin range effected? My 2015 ltz 6.2 broke a intake spring and luckily i caught it before it dropped valve. So this makes me nervous.

Auto Evolution

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[bjr2020 6.2]

This 6.2 runs strong but does have that odd warmup lifter tick that ppl on here speak off. My 15 was a quieter running motor.