Service bulletins for the 2018 Buick LaCrosse
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.
991 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
Only bulletins with component: Engine are shown. Show all
| PIP5568C | 2018-12-17. Service bulletin. ENGINE. This Preliminary information communicates there is an investigation into cause and correction for this group of DTC's setting together. (P0011, P0014, P0021, P0024). Revised to include the possibility of setting in pairs and some drivability concerns. |
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| PIP5486F | 2018-11-13. Service bulletin. ENGINE. This Preliminary information communicates possible concerns and a diagnostic strategy to locate and repair various noises within the engine as well as some misfire causes. |
| PIP5597 | 2018-11-13. Service bulletin. ENGINE; EQUIPMENT:OTHER:LABELS. This Preliminary information communicates to the technician where to find the engine identification tag and what information on that tag to use during programming of someengine control modules. |
| PIC6229C | 2018-10-15. Service bulletin. ENGINE. This Preliminary Information communication provides information to the technician about vehicles that have a crank but engine does not start concern.Technician will use this publication to reset the battery low state of charge concern after extended crank where the vehicle will no longer crank anymore and the cause of the no start concern is repaired.If Diagnostic Trouble Code P0AFA is the only Diagnostic Trouble Code set this could be caused by an internal fault in the high voltage battery and SI diagnosis will have to be followed for further diagnosis. |
| 18239 | 2018-10-09. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. 18239 - Emissions Recall - General Motors has decided to conduct a Voluntary Emission Recall involving certain 2018 model year vehicles, equipped with 4-cylinder engines (RPO LHN, LEX, L3A, LYX, LKN, LE2, LCV or LTG). On some vehicles, an electrical connection in the circuit board may fail in the engine control module. If this occurs, a malfunction indicator lamp (MIL), such as the Check Engine Light may illuminate. Replace the Engine Control Module (ECM). |
| PIP5486D | 2018-09-17. Service bulletin. ENGINE. This Preliminary information communicates possible concerns and a diagnostic strategy to locate and repair various noises within the engine as well as some misfire causes. |
| PIP5493G | 2018-09-17. Service bulletin. ENGINE. This Preliminary information communicates diagnostic tips for misfires on active fuel management cylinders and engineering investigations into cylinder 6 misfire on XT5 and cylinder 4 misfire on LaCrosse both of which are 2017. Changes to Preliminary informationinclude adding MY2018, advising of calibration for previous investigation and adding pictures to identify concern. Also defining calibration update information. |
| PIP5095F | 2018-09-17. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL 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. |
| PIP5163D | 2018-09-17. Service bulletin. ENGINE. This Preliminary Information communication provides information to the technician about engine block of possible cylinder bore damage, scoring or out of round as the possible cause of engine oil consumption, misfire, cylinder leakage or blow by. Technician will need to inspect the engine for Cylinder damage or scoring, An out of round cylinder bore, Dirt intrusion, and Catalytic Converter failure. |
| PIP5568A | 2018-08-06. Service bulletin. ENGINE. This Preliminary information communicates there is an investigation into cause and correction for this group of DTC's setting together. (P0011, P0014, P0021, P0024). |
| PIP5373B | 2018-08-06. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This Preliminary Information communication provides the technician with steps on how to program an Engine Control Module when getting a Service Programming System error code E4491 or E4423. In some cases Techline Customer Support Center may need to be contacted to resolve the issue. |
| PIC6334 | 2018-06-18. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT; ENGINE AND ENGINE COOLING. This Preliminary information communicates that a p0A90 could be caused by a missing Stop bolt and Brace. This is for the lower tensioner that can tavel to far with out the stop. |
| 00-06-01-026J | 2018-06-11. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin provides information on Intake Manifold Inspection/Replacement After Severe Internal Engine Damage. |
| 18046 | 2018-06-04. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS; ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ENGINE AND ENGINE COOLING. 18046 - Service Update. On certain vehicles, the motor generator unit (MGU) coolant hose may contact the battery power inverter module (BPIM). Customers may experience a coolant leak. Dealers are to install a shorter bolt. They should also inspect the coolant hose for damage and replace it as necessary. |
| PI0653E | 2018-06-04. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. This preliminary informational bulletin provides information on Damaged, Disassembled or Improperly Packaged Turbochargers Returned to Warranty Part Center. |
| 060601010D | 2018-06-04. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. This informational bulletin explains how the catalytic converters may need an inspection, cleaning or replacement if debris have entered the exhaust system. |
| 16NA051 | 2018-06-04. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE; ELECTRICAL SYSTEM. This technical bulletin provides a procedure for connector kit and ambient air temperature sensor harness replacement due to active shutters being inoperative. |
| 070604019F | 2018-06-04. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This technical bulletin provides repair information for repairing the IP to body harness connector to correct a customer concern for intermittent Malfunction Indicator Lamp (MIL) illuminated with Reduced Engine Power displayed and DTC P2138 set. |
| 040730013D | 2018-06-04. Service bulletin. POWER TRAIN; ENGINE; EQUIPMENT. This informational bulletin provides information to dealership personnel on automatic transmission shift and engine drivability concerns and/or MIL ON due to aftermarket oil bath air filter use. |
| 010601011J | 2018-06-04. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. This informational bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption. |
| PIC6303 | 2018-05-21. Service bulletin. ENGINE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). This Preliminary information communicates to look for other codesP0AEE, P0AF3, P0BD2, P0BD7, P0BDC, P0BE1 if a customer comes in with a Mil Request. |
| PIP5163C | 2018-05-21. Service bulletin. ENGINE. This Preliminary Information communication provides information to the technician about engine block of possible cylinder bore damage, scoring or out of round as the possible cause of engine oil consumption, misfire, cylinder leakage or blow by. Technician will need to inspect the engine for Cylinder damage or scoring, An out of round cylinder bore, Dirt intrusion, and Catalytic Converter failure. |
| 00-06-01-012G | 2018-05-21. Service bulletin. ENGINE. This informational bulletin advises the possible issues that may occur using a scotch brite pad or highly abrasive disk on engine surfaces. |
| 18NA125 | 2018-05-21. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin provides information for engine oil life monitor operation calculation. |
| PIT5513E | 2018-05-21. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This Preliminary Information communication advises the technician that the Technical Assistance Center TAC has a part restriction for the hybrid/EV battery Pack, Hybrid/EV Powertrain Control Module (HPCM2), High Voltage Battery Interface Control Module 1 and 2, Drive Motor Generator Battery Cooling Blower. The dealer technician is advised to call the GMTechnical AssistanceCenter for further assistance |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.