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2014 - 2016 Corvette: Service Bulletin: Engine Misfire/Tick Noise, Malfunction Indicator Lamp (MIL) On, DTC P0300 Set

#15-06-01-002D: Engine Misfire/Tick Noise, Malfunction Indicator Lamp (MIL) On, DTC P0300 Set - (Jul 11, 2016)

Subject Engine Misfire/Tick Noise, Malfunction Indicator Lamp (MIL) On, DTC P0300 Set  
Models 2015-2016 Cadillac Escalade
2016 Cadillac CTS-V
2014 Chevrolet Silverado 1500
2014 - 2016 Chevrolet Corvette
2015 - 2016 Chevrolet Silverado, Suburban, Tahoe
2016 Chevrolet Camaro
2014 GMC Sierra 1500
2015 - 2016 GMC Sierra, Yukon, Yukon XL
Equipped with 5.3L Engine (RPO L83) or 6.2L Engine (RPO L86, LT1, LT4)
Attention This Bulletin also applies to any of the above models that may be Export from North America vehicles.

This Bulletin has been revised to add a Note for Camshaft Inspection and update the Warranty information. Please discard Corporate Bulletin Number 15-06-01-002C.


Condition

Some customers may comment on a malfunction indicator lamp (MIL) on and/or an engine misfire/tick noise.

Technicians may find DTC P0300 set or in history.

Cause

This may be the result of an active fuel management (AFM) lifter that is mechanically collapsed and/or stuck all of the time.

This may be the result of internal locking pin damage in the lifter, due to oil aeration.

Correction

Note: Inspect the camshaft for damage while the lifters are removed from the engine. If damage is found, replace the camshaft per SI.

If SI diagnosis does not isolate the cause of this concern, technicians should inspect for valve operation.

If the valve(s) are not moving, replace the valve lifter oil manifold and affected bank of AFM lifters. Refer to Valve Lifter Oil Manifold Replacement and Valve Lifter Replacement in SI.

If the lifter has spun the bore, the guides should be replaced also.

Parts Information

Part Number

Description

12660737

MANIFOLD ASM-VLV LFTR OIL (SERV KIT) (L83, L86, or LT1)

12660736

MANIFOLD ASM-VLV LFTR OIL (SERV KIT) (LT4)

12623104

GASKET-VLV LFTR OIL UPR MANIF

12645725

LIFTER ASM-VLV (AFM) (4 per Bank)

12659260

GASKET-CYL HD (6.2L)

12622325

GASKET-CYL HD (5.3L)

11546959

RIGHT SIDE CYLINDER HEAD BOLTS (10)

11611976

LEFT SIDE CYLINDER HEAD BOLT (1)

11546959

LEFT SIDE CYLINDER HEAD BOLTS (9)

12657093

GASKET-EXH MANIF

12626354

GASKET-INT MANIF (8)

12619787

GASKET-VLV RKR ARM CVR

12623308

GASKET-F/PMP BRKT

12618336

PIPE ASM-FUEL FEED INTER

12618337

PIPE ASM-FUEL FEED INTER

12618338

PIPE ASM-FUEL FEED

12668553

SEAL KIT-F/INJR (O RING) (2)

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