#15-06-01-002D: Engine Misfire/Tick Noise, Malfunction Indicator Lamp (MIL) On, DTC P0300 Set - (Jul 11, 2016)
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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.
<dl><dt>Condition</dt><dd> 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.
</dd></dl><dl><dt>Cause</dt><dd> 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.
</dd></dl><dl><dt>Correction</dt><dd> 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.
</dd></dl><dl><dt>Parts Information</dt><dd>
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| 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. |
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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.
<dl><dt>Condition</dt><dd> 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.
</dd></dl><dl><dt>Cause</dt><dd> 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.
</dd></dl><dl><dt>Correction</dt><dd> 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.
</dd></dl><dl><dt>Parts Information</dt><dd>
| 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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