2025 GMC Hummer EV SUV technical service bulletins
121 technical service bulletins and manufacturer communications cover the 2025 GMC Hummer EV SUV.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
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- This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a...
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- Vehicles may display a MIL or “Service High Voltage” message, with DTC P061B stored as current or history
- Customer Satisfaction Program
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- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
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- This PI is created to inform GM dealers that some vehicles may intermittently fail to connect wireless...
- This update contains a required software change to help improve the overall software update and...
- • Improved availability and map updates for Super Cruise • Improvements to active cabin ventilation •...
- • Fixes to help ensure start reliability and prevent battery drain • Improved charging performance and...
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- The Battery Energy Control Module (BECM) in certain vehicles include battery-monitoring software
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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...
- • Improvements to OnStar through enhancements for charging, Super Cruise, remote start, and collision...
- PI to help diagnose A/C concern
- Reduces unnecessary service messages, check engine light activations, and OnStar emergency calls from your...
- This Pi is to let dealer know that a program issue has been released and to not replace any hard for codes...
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- • This update enables functionality for King Crab mode
- • Improvements to active cabin ventilation • Additional protection for the health of your battery •...
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- This PI provides diagnostic steps for dealer technicians to verify the condition and ensure that part...
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- Pi created to provide GM dealers with information on gathering information for projection issue
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- PI created to provide dealer technicians with procedures for updating Google Maps.
- Service Update
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- 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 information informing dealers that Engineering is aware of the clunk noise and is...
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- • Improvements to the performance of One-Pedal Driving
- • Improvements to help protect battery health in low temperatures
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- This PI provides diagnostics tips to dealership techs when trying to diagnose a CAN Bus communication...
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- This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered...
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- The Driver Information Center may display a message of Transport Mode On after the ignition is cycled.
- This bulletin advises the tech not to replace the shock for possible air leak, but to replace the air...
- • Improvements to battery health diagnostics • Fixes for efficiency when using fast charging stations •...
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- A vehicle may come in with B3A6B set in history
- New Vehicle Monitoring Programs Section in IVH
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- This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and...
- This information provides software update information for the K73 Telematics module to correct the...
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- This service bulletin provides information on Tire Sidewall Irregularities.
- This service bulletin provides Requirements for Replacement of the Dual Mode Cord Set Under Warranty.
- This service bulletin and criteria within are to determine the internal state of the High Voltage Battery...
- This engineering information (EI) will assist GM to recover a small number of electric vehicle battery...
- This service bulletin provides information on High Voltage Drive Motor Battery
- This informational bulletin provides information on Wheel Drive Shaft Retention Snap Ring Design Change.
- This service bulletin provides dealers with Warranty Administration information on North American Charging...
- This service bulletin provides information for dealers/technicians on SPS2 Hybrid/EV Battery Data...
- This engineering informational bulletin is requesting information from technicians to perform the check...
- This service bulletin provides information for the technicians to use a Customer Concern Verification...
- This engineering information (EI) is requesting information from technicians to perform the check list...
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