2019 - 2021 Corvette: Service Bulletin: #19-NA-218: Ticking Noise from the Engine - (Dec 16, 2020)
Estimated Reading Time: 3 Minutes#19-NA-218: Ticking Noise from the Engine - (Dec 16, 2020)
| Subject: | Ticking Noise from the Engine |
This bulletin replaces PIP5606E. Please discard PIP5606E.
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Brand: |
Model: |
Model Year: |
VIN: |
Engine: |
Transmission: | ||
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from |
to |
from |
to | ||||
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Cadillac |
CTS-V |
2019 |
2019 |
— |
— |
6.2L (LT4) |
— |
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Escalade |
2019 |
2021 |
5.3L, 6.2L (L83, L86, L87) |
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Chevrolet |
Camaro |
2019 |
2021 |
6.2L (LT1, LT4) |
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Corvette |
2019 |
2019 |
6.2L (LT1, LT4, LT5) |
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2020 |
2021 |
6.2L (LT2) |
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Silverado 1500 (New Model 12th Digit VIN = 7) - 4WD |
2019 |
2019 |
4.3L, 5.3L, 6.2L (LV3, L82, L84, L87) |
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Silverado 1500 (New Model) |
2019 |
2021 |
4.3L, 5.3L, 6.2L (LV3, L82, L84, L87) |
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Silverado LD |
2019 |
2019 |
5.3L, 6.0L, 6.2L (L83, L96, LC8) |
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Suburban |
2019 |
2021 |
5.3L, 6.2L (L83, L84, L86, L87) |
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Tahoe |
2019 |
2021 |
5.3L, 6.0L, 6.2L (L83, L84, L86, L87, L96) |
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GMC |
Sierra Limited |
2019 |
2019 |
5.3L, 6.0L (L83, L96, LC8) |
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Sierra 1500 (New Model) |
2019 |
2021 |
4.3L, 5.3L, 6.2L (L82, L84, L87, LV3) |
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Yukon Models |
2019 |
2021 |
5.3L, 6.2L (L83, L84, L86, L87) |
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Involved Region or Country |
North America, Europe, Russia, Middle East, Iraq, Israel, Palestine, Argentina, Brazil, Chile, Colombia, Ecuador, Paraguay, Peru, Uruguay, Venezuela, Japan, Cadillac Korea (South Korea), GM Korea Company, Thailand |
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Condition |
Some customers may comment that they hear a ticking noise coming from the engine when cold.
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Cause |
This condition may be caused by a lifter not having a sufficient amount of oil during cold start operation (not pumped up). |
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Correction |
To correct this condition, follow the Service Procedure below. |
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Service Procedure
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Allow the engine to sit overnight.
Note: You may need to allow 5-7 minutes to confirm.
- Start the vehicle and listen for a tick noise.
- If a tick noise is present, proceed to the next step.
- If a tick noise is NOT present after running engine for at least 5 to 7 minutes, release the vehicle back to the customer.
- Drive the vehicle through the DFM modes.
- Check for any misfire DTCs and record:
- If DTCs are found, refer to SI for diagnosis.
- If no DTCs are found and noise still persists, operate the engine through cylinder Deactivation test to isolate the cylinder with the concern.
- If the noise has been isolated, inspect for a bent pushrod and/or collapsed lifter.
- If the pushrods are found to be in working condition, replace the lifters on the affected banks. Refer to Valve Lifter Replacement in SI.
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Parts Information
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Note: Only select the parts that coincide with the repair performed. Replace the part with the P/N outlined in the Electronic Parts Catalog (EPC) in accordance with the vehicle VIN.
Note: Refer to Service Bulletin 20-NA-038 for additional information on AFM and DFM usage.
Causal Part
Description
Part Number
Qty
X
LIFTER, VLV (Active)
12680871
2 per bank (6 CYL DFM)
4 per bank (8 CYL AFM)
8 per bank (8 CYL DFM)
X
LIFTER, VLV (NON-ACTIVE LIFTERS)
12648846
4 per bank (6 CYL)
4 per bank (8 CYL non DFM)
N/A
GASKET, CYL HD (L82, L83, L84)
12622325
1
N/A
GASKET, CYL HD (L87)
12688943
1
N/A
GASKET, CYL HD (LC8, L96)
12610046
1
N/A
GASKET, CYL HD (LT1)
12659260
1
N/A
GASKET, CYL HD (LV3)
12632968
1
N/A
GASKET, CYL HD (L86, LT2)
12688943
1
N/A
BOLT, CYL HD (M12x1.75x102)
11611976
Refer to EPC
N/A
BOLT, CYL HD (M12x1.75x134)
11546959
Refer to EPC
N/A
GASKET, VLV RKR ARM CVR
12619787
1
N/A
GASKET, EXH MANIF
12657093
1
N/A
PIPE, FUEL FEED INTER
Refer to EPC
1
N/A
GASKET, INT MANIF
12626354
6 (6 CYL)
8 (8 CYL)
N/A
GASKET, W/PMP
12682391
1
N/A
SEAL, KIT F/INJR (O-ring)
12672366
Refer to EPC
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Version |
4 |
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Modified |
Released February 14, 2020 May 28, 2020 – Added RPO LT2 to Corvette and Cylinder Head Gasket P/Ns 12632968 (LV3) and 12688943 (L87) to Parts Information. December 01, 2020 – Updated the Quantity information for P/N 12626354 and 12672366 in the Parts Information section. December 16, 2020 – Added the 2021 Model Year to certain vehicles, added Engine RPOs and updated the Parts Information section. |