# Service bulletin PI1391

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.

- Type: Service bulletin
- NHTSA id: 10139418
- Published by NHTSA: 2018\-06\-04
- Manufacturer's number: PI1391
- Manufacturer's date: 2015\-01\-15
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

This preliminary informational bulletin provides a diagnostic tip for coolant leak at oil cooler inlet pipe o\-ring after service engine replacement.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2015/MC-10139418-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2015/MC-10139418-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2003 to 2009 CHEVROLET C SERIES
- 2003 CHEVROLET CONVENTIONAL
- 2006 to 2010 CHEVROLET EXPRESS
- 2001 to 2010 CHEVROLET SILVERADO 1500
- 2002 to 2005 CHEVROLET SILVERADO 1500 HD
- 2001 to 2010 CHEVROLET SILVERADO 2500
- 2001 to 2010 CHEVROLET SILVERADO 3500
- 2003 to 2005 CHEVROLET T SERIES
- 2010 CHEVROLET T SERIES
- 2004 to 2006 GMC C SERIES
- 2003 GMC G SERIES
- 2001 to 2002 GMC GM
- 2006 to 2010 GMC SAVANA
- 2001 to 2010 GMC SIERRA 1500
- 2001 to 2010 GMC SIERRA 2500
- 2001 to 2010 GMC SIERRA 3500
- 2007 to 2010 GMC SIERRA DENALI
- 2003 to 2010 GMC TOPKICK

## Recalls for the same vehicles and component

- [2007363](/recalls/tc/2007363.md), 2007-11-09: Engine
- [07V521000](/recalls/nhtsa/07V521000.md), 2007-11-07: ENGINE AND ENGINE COOLING
- [06V289000](/recalls/nhtsa/06V289000.md), 2006-08-03: ENGINE AND ENGINE COOLING

## Other bulletins for the same vehicles and component

- [00\-06\-01\-026R](/bulletins/11026017.md), 2025-12-03, Service bulletin: ENGINE. This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
- [23\-NA\-153](/bulletins/11024485.md), 2025-10-25, Service bulletin: ENGINE. The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.
- [03\-06\-01\-023I](/bulletins/11012907.md), 2025-01-17, Service bulletin: ENGINE. This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
- [19\-NA\-219](/bulletins/11011900.md), 2024-12-17, Service bulletin: ENGINE. This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue.
- [04\-06\-01\-029K](/bulletins/11011205.md), 2024-12-04, Service bulletin: POWER TRAIN; STEERING; ENGINE. This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules.
- [03\-06\-01\-023H](/bulletins/11010544.md), 2024-11-14, Service bulletin: ENGINE. This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
- [01\-06\-01\-011Q](/bulletins/11010490.md), 2024-11-13, Service bulletin: ENGINE. This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
- [20\-NA\-138](/bulletins/11009756.md), 2024-11-05, Service bulletin: POWER TRAIN; ENGINE. This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.
- [04\-06\-04\-051J](/bulletins/11009532.md), 2024-10-31, Service bulletin: ENGINE. This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
- [04\-06\-04\-051J](/bulletins/11009531.md), 2024-10-31, Service bulletin: ENGINE. This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.

JSON: [/v1/bulletins/10139418](/v1/bulletins/10139418)

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