2019 - 2020 Corvette: Service Bulletin: #19-NA-218: Ticking Noise from the Engine - (Dec 1, 2020)

#19-NA-218: Ticking Noise from the Engine - (Dec 1, 2020)

Subject Ticking Noise from the Engine

This bulletin replaces PIP5606E. Please discard PIP5606E.


Brand:

Model:

Model Year:

VIN:

Engine:

Transmission:

from

to

from

to

Cadillac

CTS

2019

2019

6.2L (LT4)

Escalade

2019

2020

5.3L, 6.2L (L83, L86)

Chevrolet

Camaro

2019

2020

6.2L (LT1, LT4)

Corvette

2019

2019

6.2L (LT1, LT4, LT5)

2020

2020

6.2L (LT2)

Silverado 1500 (New Model 12th Digit VIN = 7) - 4WD

2019

2019

4.3L, 5.3L, 6.2L (L84, L87, LV3)

Silverado 1500 (New Model)

2019

2020

5.3L, 6.0L, 6.2L (L83, L86, L96)

Silverado LD

2019

2019

4.3L, 5.3L, 6.2L (L84, L87, LV3)

Suburban

2019

2020

5.3L (L83, L86)

Tahoe

2019

2020

5.3L, 6.0L, 6.2L (L83, L86, L96)

GMC

Sierra Limited

2019

2019

5.3L, 6.0L, 6.2L (L83, L86, L96)

Sierra 1500 (New Model)

2019

2020

4.3L, 5.3L, 6.2L (L84, L87, LV3)

Yukon Models

2019

2020

5.3L, 6.2L (L83, L86)

 

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

Condition

Some customers may comment that they hear a ticking noise coming from the engine when cold.

    • This ticking noise will mainly occur during the first initial start in the morning.

Cause

This condition may be caused by a lifter not having a sufficient amount of oil during cold start operation (not pumped up).

Correction

To correct this condition, follow the Service Procedure below.

Service Procedure

Allow the engine to sit overnight.

Note: You may need to allow 5-7 minutes to confirm.

  1. 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.
  2. Drive the vehicle through the DFM modes.
  3. 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.
  4. 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.

Parts Information

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 (L84)

12622325

1

N/A

GASKET, CYL HD (L87)

12688943

1

N/A

GASKET, CYL HD (LT1)

12659260

1

N/A

GASKET, CYL HD (LV3)

12632968

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 CVP

12619787

1

N/A

GASKET, EXH MANIF

12657093

1

N/A

PIPE, FUEL FEED INTR

12677002

1

N/A

PIPE, FUEL FEED INTER

12679463

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

Warranty Information

Note: Only select the labor operation that coincides with the repair performed.

For vehicles repaired under the Powertrain coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information.

Labor Operation

Description

Labor Time

4062390

Valve Lifter Replacement - Right Side

Use Published Labor Operation Time

4062391

Valve Lifter Replacement - Both Sides

4062410

Valve Lifter Replacement - Left Side

4062450

Valve Lifter Replacement

 

Version

3

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.

 

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