Diagnostic Tip for Oil Consumption and Repair – 2014-2016 Cadillac Chevrolet GMC

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Service Bulletin Bulletin No.: 19-NA-036
Date: June, 2019
TECHNICAL
Subject: Diagnostic Tip for Oil Consumption and Repair
This bulletin replaces PIP5382. Please discard PIP5382.
Brand: Model:
Model Year: Vehicles Build Date:
Engine: Transmission:
from to from prior to
Cadillac Escalade
Models 2015
2016 SOP
4.3L (LV3)
November 1,
2015
5.3L (L83)
July 1, 2015
6.2L (L86)
September 1,
2015
L86
Chevrolet
Silverado
Models 2014 LV3, L83, L86
Suburban 2015 L83
Tahoe 2015 L83
GMC
Sierra
Models 2014 LV3, L83, L86
Yukon
Models 2014 L83, L86
Involved Region or Country North America, Europe, Middle East, Israel, Russia, South America, Japan, China, South
Korea and Thailand.
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.
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 June, 2019 Bulletin No.: 19-NA-036
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.
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.
Bulletin No.: 19-NA-036 June, 2019 Page 3
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 Qty
X PISTON KIT, ENG
Refer to EPC
6 (V6)
8 (V8)
N/A BEARING KIT, CONN ROD 8
N/A Manifold, VLV LFTR OIL 1
N/A
GASKET KIT, CYL HD
1 (V6)
N/A 1 (V8)
N/A PIPE, FUEL FEED INTER 1
N/A BOLT, CYL HD (M12X1.75X134) 10 (V6)
N/A BOLT, CYL HD (M12X1.75X102) (BOLTHEXFGH)
1 (V8)
N/A BOLT, CYL HD (M12X1.75X134) 19 (V8)
N/A BOLT, EXH MANIF (M8X1.25X30.7)
8 (V6)
10 (V8)
N/A SEAL, CR/SHF RR OIL 1
N/A GASKET, CR/SHF RR OIL SEAL HSG 1
N/A GASKET, W/PMP 1
N/A SEAL, OIL LVL IND TUBE (O RING) 1
N/A SEAL, OIL PAN HIGH PRESS PORT 1
N/A SEAL, OIL PAN FRT 1
N/A DEFLECTOR, CR/SHF OIL
1 (V6)
1(V8)
N/A Oil, Engine 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 Engine Labor Time
4086778* Replace All Pistons
and Rings
Escalade
5.3L (L83) prior to
July 1, 2015
6.2L (L86) prior to
September 1, 2015
21.8 hr
Suburban
Tahoe
Yukon
Silverado
Sierra
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
Page 4 June, 2019 Bulletin No.: 19-NA-036
Labor Operation Description Vehicle Engine Labor Time
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 4
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.
Revised June 11, 2019 – Add additional parts to the Parts Information section.

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