2026 Cadillac Lyriq technical service bulletins
171 technical service bulletins and manufacturer communications cover the 2026 Cadillac Lyriq.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
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- If a vehicle has an when attempting to perform a vehicle dynamic sensor learn, the scan tool may display a...
- This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a...
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- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
- If a vehicle has an issue with super cruise inoperative tech is directed to follow a diagnostic path...
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- This PI states that if SDGM DTC P0604/P0607 is set and no other SDGM DTCs are present, clear DTCs and...
- This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set...
- PI to help diagnose A/C concern
- • Improvements to Super Cruise disengagement alerts
- • Improved vehicle performance when driving in Reverse on slippery surfaces • Better One-Pedal Driving...
- • Additional protection for battery health and to help prevent battery drain • Improved charging messaging...
- • Additional protection for battery health and to help prevent battery drain • Improved charging messaging...
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- • Fixes to help prevent loss of functionality for connectivity features such as OnStar, Wi-Fi, Navigation,...
- This PI explains that the T18, Battery charger drive power distribution control modules are on parts...
- Fog lamp control may be missing from radio display after a BCM update
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- Condition in which the Telematic Control Module may enter an unrecoverable state
- • Improvements to diagnostics and service messaging for battery health, particularly in humid conditions
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- This PI details a possible issue with the heads up display being inop, due to a possible software anomaly.
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- This PI Communicates that a grind noise maybe heard if the spring plate is not transferred to the new...
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- Pi created to provide GM dealers with information on gathering information for projection issue
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- • Surround Vision Recorder, a new feature that allows you to record, watch, and save video from your...
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- Condition in which the Telematic Control Module may enter an unrecoverable state
- • The head-up display will now be less likely to experience any loss of image
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- A vehicle may have a service driver assist message and the technician cannot get the Long Range Radar...
- Been sold with a GM NACS Level 2 EV charging adapter (NACS to J1772) in which a quality issue was identified
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- This PI communicates a possible concern with the customer experiencing a service headlamp message on...
- • Improvements to the infotainment system from Android update
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- This P/I is advising that the TCM should not be replaced for DTC P16F4 and to follow the repair instructions.
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- Certain vehicles listed above may be missing relevant information regarding the use of snow chains, snow...
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- This P/I is advising that the TCM should not be replaced for DTC P16F4 and to request FSE assistance for a...
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- •Improvements to help protect battery health in low temperatures
- • Fixes for active cabin ventilation
- This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered...
- This PI communicates information that the Collision / Detection Systems will revert to default setting of...
- •This update will allow you to enable digital key with the myCadillac mobile app
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- Fixes to help prevent loss of functionality for OnStar, infotainment apps, and connectivity features
- This PI addresses a possible roll up then down window message.
- The Driver Information Center may display a message of Transport Mode On after the ignition is cycled.
- This information provides software update information for the K73 Telematics module to correct the...
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- A vehicle may come in with B3A6B set in history
- New Vehicle Monitoring Programs Section in IVH
- This preliminarily information communication an issue with the supercruise dropping out when next to a...
- This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and...
- PI is created to advise dealer of an issue that may have been induced by OTA programming
- Certain vehicles may be missing relevant information regarding the use of snow chains, snow socks, or...
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- Diagnostic Guidance for U3000-97 Long Range Radar Blocked
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- This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
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- •Improvements to Apple CarPlay performance
- Great News! Your vehicle keeps getting better
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- This service bulletin provides information on Tire Sidewall Irregularities.
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- This service bulletin provides a service procedure to correct a customer concern of Grind, Groan and/or...
- This service bulletin provides information for the technicians to use a Customer Concern Verification...
- This service bulletin provides information for dealers/technicians on Software Updates on Ultium Vehicles.
- This warranty administration bulletin provides information for dealers/technicians on System Reset and...
- This service bulletin provides information for dealers/technicians on Vehicle Wide Programming Instructions.
- This warranty administration bulletin provides policy information for GM courtesy transportation and...
- This service bulletin provides information on the proper Reflective High Temperature Heat and/or...
- The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential...
- This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be...
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