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Service bulletin PIP4910D

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 id10056835
Published by NHTSA2015-02-25
Manufacturer's numberPIP4910D
Manufacturer's date2014-12-01
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM

NHTSA's summary

CADILLAC: WHEN SERVICING ANY OF THE COOLING SYSTEMS ON THE CADILLAC, CHEVROLET &OPEL AMPERA VEHICLES IT IS IMPORTANT TO USE THE PROPER COOLANT AND WATER MIXTURE. *LJ UPDATED 2/25/15. *LJ

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine, Cooling system

Vehicles listed
CADILLAC CTS2014
CHEVROLET VOLT2011, 2012, 2013, 2014, 2015
OPEL AMPERA2012, 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
PIP5684B2020-08-10. Service bulletin. This Preliminary information communicates the use of air leak diagnostic test tool CH-52250 in addition to the information found in the service manual.
19NA1042019-07-29. Service bulletin. This informational bulletin provides information for dealers/technicians and customers on steam/vapor coming from the front grille or radiator area.
PIP5257B2018-08-20. Service bulletin. 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.
PIE0385B2018-05-21. Service bulletin. This engineering information bulletin ends the need for information from the field on vehicles that have the concern of a noisy water pump.
PI1041B2018-05-21. Service bulletin. This preliminary bulletin provides information on diagnosing a water pump for what is considered a leak and replace the pump correctly.
PI1299A2018-05-07. Service bulletin. This preliminary informational bulletin provides repair information for repositioning an A/C drain hose for a customer concern of water present on front passenger floor.
PIP4959D2017-08-15. Service bulletin. 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.
PIP5095B2017-08-15. Service bulletin. 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.
PIP4859D2017-03-15. Service bulletin. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON THE STEPS TO VACUUM FILL TO ENSURE THE COOLING SYSTEM IS PROPERLY FILLED. TECHNICIAN WILL NEED TO USE SPECIAL TOOL GE-47716 VAC-N-FILL COOLANT REFILL TOOL. TECHNICIAN WILL ALSO PERFORM HYBRID/EV BATTERY PACK COOLANT PUMP BLEED PROCEDURE IN THE GDS2 TOOL. AFTER PERFORMING THE GDS2 COOLANT BLEED PROCEDURE DRIVE VEHICLE FOR APPROXIMATELY 5 MILES IN A SLALOM TYPE OF SITUATION TO PURGE ANY REMAINING AIR FROM BATTERY PACK COOLING PLATES.
PIC5381A2016-06-22. Service bulletin. SUMMARY TO BE PROVIDED ON A FUTURE DATE.