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Service bulletin PI0421C

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10138216
Published by NHTSA2018-05-21
Manufacturer's numberPI0421C
Manufacturer's date2012-11-28
NHTSA componentENGINE AND ENGINE COOLING; POWER TRAIN:CLUTCH ASSEMBLY:MASTER CYLINDER; POWER TRAIN:MANUAL TRANSMISSION; EQUIPMENT

NHTSA's summary

This preliminary information bulletin provides a procedure to remove and replace the clutch actuator cylinder elbow seal for concerns regarding a fluid leak after clutch actuator replacement.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Equipment and accessories, Transmission and driveline, Clutch, Manual transmission

Vehicles listed
CHEVROLET C SERIES2004
CHEVROLET C SERIES2006 to 2007
CHEVROLET CRUZE2011, 2012, 2013, 2014, 2015, 2016
CHEVROLET SONIC2012, 2013

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
PI0421C2024-05-06. Service bulletin. Fluid Leak after Clutch Actuator Replacement.
PIE0298A2024-04-15. Service bulletin. Engineering Information
PIE02982024-04-15. Service bulletin. Engineering Information
15NA0732024-02-12. Service bulletin. Difficult to Shift and/or Hard to Get into Gear
990420002L2021-08-09. Service bulletin. This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation.
PI1086A2021-04-21. Service bulletin. Shifter Handle Knob Cracked and/or Will Not Operate While Shifting Out of Park Some customers may comment on the shifter handle knob being cracked and/or will not operate while shifting out of Park. This condition may occur if the chrome knob on the shifter handle cracks, not allowing the shifter to engage into gear.
18NA1712020-08-31. Service bulletin. This technical bulletin provides a procedure to repair the mechanical components and then reprogram the throttle body to prevent the conditions of a rough running engine, MIL On from happening again.
20NA0472020-04-27. Service bulletin. This technical bulletin provides a service procedure to correct conditions of Front or Rear Crankshaft Oil Leak, MIL Illuminated with DTC P1101 Set.
030729004L2019-05-20. Service bulletin. This informational bulletin provides normal operating characteristics and diagnostic information on Manual transmissions.
PIP5558C2018-08-20. Service bulletin. This Preliminary information communicates a possible cause of the clutch pedal slow to return.