# Service bulletin PIP5093

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: 10112856
- Published by NHTSA: 2017\-08\-15
- Manufacturer's number: PIP5093
- Manufacturer's date: 2013\-02\-12
- NHTSA component: ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING

## NHTSA's summary

This Preliminary Information communication provides information to the technician about vehicles that may have an engine oil leak that appeared as they were driving the vehicle in extremely cold ambient temperatures. The technician may find the oil leak is coming from the rear main seal. Technician will need to check for proper thermostat operation by following thermostat Diagnosis as outlined in Service Information and replace the thermostat as necessary. Also the technician will remove the cam cover, inspect the positive crankcase ventilation baffle inside, and replace the cam cover if obvious sludge build up is present. Any debris in the positive crankcase ventilation pipes, hoses, the positive crankcase ventilation nipple on the cam cover, and the throttle body should be cleaned out. Technician should inspect the related positive crankcase ventilation hoses/connections for potential damage and replace if necessary. Run the engine at operating temperature for 15 minutes at idle. Then turn the engine off, and drain the engine oil for at least 15 minutes to remove all oil and condensation or water from the crankcase. Follow Service Information repair procedures to repair any oil leaks that were induced as a result of the frozen positive crankcase ventilation system and excessive crankcase pressure. Technician should insure the Engine Control Module calibrations have been installed to adjust the engine oil life monitor to a maximum of 7,500 miles \(12,070 KM\) as well.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2013/MC-10112856-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2013/MC-10112856-0001.pdf)

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

## Components

Engine, Cooling system

## Vehicles listed

- 2010 to 2012 BUICK LACROSSE
- 2011 to 2012 BUICK REGAL
- 2010 to 2012 CHEVROLET EQUINOX
- 2010 to 2012 GMC TERRAIN

## Other bulletins for the same vehicles and component

- [PIP5684B](/bulletins/10178370.md), 2020-08-10, Service bulletin: ENGINE; ENGINE AND ENGINE COOLING:COOLING SYSTEM; EQUIPMENT. This Preliminary information communicates the use of air leak diagnostic test tool CH\-52250 in addition to the information found in the service manual.
- [PIP5257B](/bulletins/10143762.md), 2018-08-20, Service bulletin: ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS. This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have oil mixed in with the engine coolant. Technician will need to inspect the oil cooler if equipped for possible leaking into the cooling system through the radiator. If no issue found replace the engine as well as all rubber coolant hoses.
- [PIP4957B](/bulletins/10113218.md), 2017-08-15, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that have a Hoot, Gurgle, Howl, or Swoosh noise from the engine cooling system. Technician will need to replace the thermostat housing with the correct part number.
- [PIP4959C](/bulletins/10112550.md), 2017-08-15, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician with information about vehicles that misfires or roughness on cold start up. Technician may find Diagnostic Trouble Code P0300 set. Technician will need to add coolant dye to the system and run the engine through warm up to circulate the dye. Pressurize the cooling system after a cold soak and inspect the cylinder with a bore scope for coolant dye. If coolant is found in the cylinder technician will need to contact General Motors Product Quality Center for engine replacement.
- [PIP4959D](/bulletins/10112404.md), 2017-08-15, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM. This Preliminary Information communication provides information to the technician with information regarding high misfire rates always on \#1 cylinder. A customer may complain of misfires or roughness on cold start up with a P0300 diagnostic trouble code. Technician is to add coolant dye to the system and run the engine through warm up to circulate the dye. Pressurize the cooling system after a cold soak and inspect the cylinder with a bore scope for coolant dye. Dye is used to identify coolant over residual fuel being that might be left in the cylinder. The technician is not to replace the cylinder head as it will not correct this concern. In some cases it is necessary to remove the head for inspection. Do not replace the engine for small surface pock marks or a pitting appearance this is normal and do not connect to coolant passages. Usually if porosity is present there will be a break in the carbon ring. Only replace the engine if true porosity is found. Technician is to call Product Quality Center with the latest version of bulletin 02\-07\-30\-029 if porosity is found and engine replacement is required.
- [PIP5095B](/bulletins/10112386.md), 2017-08-15, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon and may also have an oil or coolant leak. Technician may find coolant or oil in a spark plug tube. If the Spark Plug Tube is leaking and it is determined that the oil or coolant is not coming from a leak above the spark plug then replace the cylinder Head, spark plug and coil.
- [PI0558C](/bulletins/10071199.md), 2016-06-13, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
- [PI0767B](/bulletins/10070879.md), 2016-06-13, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
- [PIP\-4957\-B](/bulletins/10052829.md), 2013-09-19, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM. GM: ON SOME VEHICLES A HOOT, GURGLE, HOWL, OR SWOOSH NOISE MAY BE HEARD COMING FROM THE ENGINE ARE. REPLACE THE THERMOSTAT HOUSING WITH THE CORRECT PART NUMBER. ALSO INCLUDE MAKE/MODEL BUICK LACROSSE MODEL YEAR 2014. \*JS
- [PIP\-4992](/bulletins/10043472.md), 2012-04-04, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. BUICK/CHEVROLET: THE COOLING FAN MAY BE INOPERATIVE DUE TO LOW SYSTEM VOLTAGE WITH THE BATTERY CONTROL MODULE \(HYBRID POWERPACK\) AND DRIVE MOTOR GENERATOR. \*PE UPDATED /15/12. \*PE UPDATED 8/17/12. \*PE

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