Service Bulletin

Bulletin No.:

19-NA-036

Date:

May, 2019

TECHNICAL
Subject:

Diagnostic Tip for Oil Consumption and Repair
This bulletin replaces PIP5382. Please discard PIP5382.

Model Year:

Brand:

Model:

Cadillac

Escalade
Models

2015

Silverado
Models

2014

Suburban

2015

Tahoe

2015

Sierra
Models

2014

Yukon
Models

2014

Chevrolet

GMC

from

Vehicles Build Date:
to

from

Engine:

prior to

Transmission:

L86

2016

SOP

4.3L (LV3)
November
1, 2015
5.3L (L83)
July 1, 2015
6.2L (L86)
September
1, 2015

LV3, L83, L86
L83
L83
LV3, L83, L86
L83, L86

Involved Region or Country

North America and N.A. Export Markets

Condition

Some customers may comment on high oil consumption.

Correction

If you are working on one of the above vehicles with excessive oil consumption of 1 qt
(0.946 liter) in 2000 miles (3218 kilometers) or 1.5 qts (1.4 liter) in 100 hours for fleet
vehicles or more, Refer to the Service Procedure below.

Service Procedure
Oil Consumption Test:
Note: Not waiting Long Enough After Running
Engine to Check Oil Level:
Some engines require more time than others for the oil
to drain back into the crankcase. To ensure a sufficient
amount of oil has drained back to the crankcase, and
an accurate reading can be obtained, the vehicle
should be allowed to sit for at least 15 minutes, after the
engine has been shut off, before taking an oil level
reading. To ensure accurate results, the temperature of
the oil should be close to the same temperature as the
last time the oil level was checked.
Many factors can affect a customer's concern with oil
consumption. Driving habits and vehicle maintenance
vary from owner to owner.

Copyright 2019 General Motors LLC. All Rights Reserved.

Note: During the oil consumption test it is
recommended to use top tier fuel (see the latest version
of 05-06-04-022) while doing the oil consumption test.
1. Start an oil consumption test:
1.1. Change the oil and filter.
1.2. Fill the engine with the appropriate oil type
and quantity. Refer to Approximate Fluid
Capacities and Adhesives, Fluids, Lubricants,
and Sealers in SI.
1.3. Start the engine.
1.4. Run engine.
1.5. Shut off engine.

Page 2

May, 2019

1.6. Check oil level. Refer to owners manual and/
or SI.
1.7. Mark the oil level on the dipstick.
2. Thoroughly evaluate each case before deciding
whether the vehicle in question has abnormal
engine oil consumption.
• If the vehicle was built before the breakpoint
shown above and the oil consumption has been
validated. It will be necessary to replace the
pistons and ring assemblies only under the
following conditions:
– No oil in the dirty air side of the PCV system.
– Deposits on the spark plugs only.
– If there is oil in the dirty air side of the PCV
system, replace the LOMA (VLOM) on 5.3L
(L83) and 6.2L (L86) only. (4.3L (LV3) uses a
different VLOM and PCV set up).
– There will be oil dripping out of the PCV tube
in side of the intake manifold.
• If the vehicle was built after the breakpoint, refer
to Oil Consumption Diagnosis in service
information for further diagnosis.

Engine Oil Recommendation:
To ensure proper engine performance and long life,
careful attention must be paid to engine oil. Following
these simple, but important steps will help protect your
investment:
• Use engine oil approved to the proper
specification and of the proper viscosity grade.
Refer to “Selecting the Right Engine Oil” in this
section.
• Check the engine oil level regularly and maintain
the proper oil level. Refer to “Checking Engine Oil”
and “When to Add Engine Oil” in this section.
• Change the engine oil at the appropriate time.
Refer to Engine oil life system in SI.
• Always dispose of engine oil properly. Refer to
“What to Do with Used Oil” in this section.

Checking Engine Oil:
It is a good idea to check the engine oil level at each
fuel fill. To get an accurate reading, the vehicle must be
on level ground. The engine oil dipstick handle is a
loop. Refer to Engine Compartment Overview for the
location of the engine oil dipstick. If a low oil message
displays on the DIC, it is important to park on level
ground to accurately measure the oil level on the
dipstick. Idling the vehicle on steep grades for a long
time can influence the level sensing accuracy.
Obtaining an accurate oil level reading is essential.
If the engine has been running recently, turn off the
engine and allow several minutes for the oil to drain
back into the oil pan. Checking the oil level too soon
after engine shutoff will not provide an accurate oil level
reading.
Warning: The engine oil dipstick handle may be
hot; it could burn you. Use a towel or glove to touch
the dipstick handle.

Bulletin No.: 19-NA-036

Pull out the dipstick and wipe it with a clean paper towel
or cloth, then push it back in all the way. Remove it
again, keeping the tip down, and check the level.

When to Add Engine Oil:
If the oil is below the cross-hatched area at the tip of the
dipstick, add 1 qt (1 liter) of the recommended oil and
then recheck the level.
Caution: Do not add too much oil. Oil levels above or
below the acceptable operating range shown on the
dipstick are harmful to the engine. If you find that you
have an oil level above the operating range, i.e., the
engine has so much oil that the oil level gets above the
cross-hatched area that shows the proper operating
range, the engine could be damaged. You should drain
out the excess oil or limit driving of the vehicle.

Parts Information
Note: Only select the parts that coincide with the repair
performed.
Use the latest part number listed in the Electronic Parts
Catalog (EPC) with the VIN filter on.
Causal
Part

Description

Part
Number

PISTON KIT,
ENG (V6)

Refer
to EPC

6

PISTON KIT,
ENG (V8)

Refer
to EPC

8

N/A

BEARING KIT,
CONN ROD

Refer
to EPC

8

N/A

Manifold, VLV
LFTR OIL

12688229

1

N/A

GASKET KIT,
CYL HD (V6)

12657967

1

N/A

GASKET KIT,
CYL HD (V8)

12657968

1

N/A

BOLT, CYL HD
(M12X1.75X134)
(V6)

11546959

10

N/A

BOLT, CYL HD
(M12X1.75X102)
(BOLTHEXFGH) (V8)

11611976

1

N/A

BOLT, CYL HD
(M12X1.75X134)
(V8)

11546959

19

N/A

BOLT, EXH
MANIF
(M8X1.25X30.7)

11546600

N/A

SEAL, CR/SHF
RR OIL

12665076

1

N/A

GASKET, CR/
SHF RR OIL
SEAL HSG

12627520

1

N/A

GASKET, W/PMP

12657430

1

N/A

SEAL, OIL LVL
IND TUBE
(O RING)

24504031

1

X

Qty

8 (V6)
10 (V8)

Bulletin No.: 19-NA-036
Causal
Part

May, 2019

Description

Part
Number

Qty

N/A

SEAL, OIL PAN
HIGH
PRESS PORT

12621086

1

N/A

SEAL, OIL
PAN FRT

12666993

1

N/A

DEFLECTOR,
CR/SHF OIL

12629014

1 (V6)

12619978

1(V8)

N/A

Oil, Engine

Page 3

Refer to EPC

Warranty Information
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

Vehicle
Escalade
Suburban
Tahoe

4086778*

Replace All Pistons
and Rings

Yukon

Silverado
Sierra

Engine

Labor Time

5.3L (L83) prior to
July 1, 2015
6.2L (L86) prior to
September 1, 2015

21.8 hr

4.3L (LV3) prior to
November 1, 2015

13.0 hr

5.3L (L83) prior to
July 1, 2015
6.2L (L86) prior to
September 1, 2015

21.4 (Base) hr
21.7 (4WD) hr

Add

To Recover and
Recharge R-1234yf
A/C System

All

All

1.2 hr

Add

To Recover and
Recharge R-134a A/C
System

All

All

0.3 hr

*This is a unique Labor Operation for Bulletin use only.

Version

3

Modified

Released March 22, 2019
Revised May 07, 2019 - Removed 2017 Model Years and added breakpoints to the Labor
Operations section.
Revised May 23, 2019 - Added connecting rod bearings to Parts Information section.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.

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