PIP5737A

Bulletin No.: PIP5737A
Published date: 09/14/2020
Preliminary Information
PIP5737A Diagnostic Tip: Inspect Engine Oil Dipstick Tube O-ring
And Areas Above Lower Oil Pan Sealing Surface For Potential
Engine oil Leaks
Proactive
Models
Brand:
Model:
Model Years:
VIN:
from
to
Engine:
Transmissions:
Cadillac
CT4-V
2020
All
All
2.7 L3B
All
Chevrolet
Silverado 1500 (New Model)
2019
All
All
2.7 L3B
All
Chevrolet
Silverado 1500
2020
All
All
2.7 L3B
All
GMC
Sierra 1500 (New Model)
2019
All
All
2.7 L3B
All
GMC
Sierra 1500
2020
All
All
2.7 L3B
All
Involved Region or
Country:
North America
Condition:
Engine Oil Leaks
Cause:
Possible Dipstick Tube O-ring Leaking Engine Oil
Correction:
When diagnosing engine oil leaks on the above listed vehicles it's important to inspect the
dipstick tube O-ring and areas above the composite oil pan sealing surface for potential oil
leaks before condemning the lower composite oil pan as root cause of engine oil leak.
Picture below shows oil leak from dipstick tube O-ring (looking through inspection mirror)
Note: If there is signs of engine oil spray on the left side of the engine or the oil leak only
occurs after a road test on the left side of the engine.
There may be no oil residue around the dipstick tube O-ring area, but remove the dipstick
tube and inspect the dipstick tube O-ring for damage and replace as needed.
Picture below shows oil leak from composite oil pan sealing surface ( shown with black light
and tracer dye)
Note: The use of engine oil dye and trace powders are recommended to assist with isolating
engine oil leak points. Be sure to clean suspected leak areas thoroughly before using trace
powders.
Version History
Version
Modi ed
2
06/11/2020 - Created on.
09/14/2020- Updated to include additional note for dipstick tube O-ring leak
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