| 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-V |
2019 |
2019 |
— |
— |
6.2L (LT4) |
— |
|
Escalade |
2019 |
2021 |
5.3L, 6.2L (L83, L86, L87) |
||||
|
Chevrolet |
Camaro |
2019 |
2021 |
6.2L (LT1, LT4) |
|||
|
Corvette |
2019 |
2019 |
6.2L (LT1, LT4, LT5) |
||||
|
2020 |
2021 |
6.2L (LT2) |
|||||
|
Silverado 1500 (New Model 12th Digit VIN = 7) - 4WD |
2019 |
2019 |
4.3L, 5.3L, 6.2L (LV3, L82, L84, L87) |
||||
|
Silverado 1500 (New Model) |
2019 |
2021 |
4.3L, 5.3L, 6.2L (LV3, L82, L84, L87) |
||||
|
Silverado LD |
2019 |
2019 |
5.3L, 6.0L, 6.2L (L83, L96, LC8) |
||||
|
Suburban |
2019 |
2021 |
5.3L, 6.2L (L83, L84, L86, L87) |
||||
|
Tahoe |
2019 |
2021 |
5.3L, 6.0L, 6.2L (L83, L84, L86, L87, L96) |
||||
|
GMC |
Sierra Limited |
2019 |
2019 |
5.3L, 6.0L (L83, L96, LC8) |
|||
|
Sierra 1500 (New Model) |
2019 |
2021 |
4.3L, 5.3L, 6.2L (L82, L84, L87, LV3) |
||||
|
Yukon Models |
2019 |
2021 |
5.3L, 6.2L (L83, L84, L86, L87) |
||||
|
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.
|
|
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. |
Allow the engine to sit overnight.
Note: You may need to allow 5-7 minutes to confirm.
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 |
|
Version |
4 |
|
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. |
Article ID: 1477
Created: December 17, 2020
Last Updated: December 17, 2020
Author: Rob Loszewski
Online URL: https://www.corvetteactioncenter.com/tech/knowledgebase/article.php?id=1477