How many open recall and software campaigns currently apply to VIN [VIN], and which display, infotainment, charging, or assist-system function does each address?

Request this answer in writing from the service advisor before authorizing repair work. The full playbook covers documentation procedures and post-service verification steps.

Was VIN [VIN] subject to the late-2023 production hold, and if so, what work was performed before delivery?

Request this answer in writing from the service advisor before authorizing repair work. The full playbook covers documentation procedures and post-service verification steps.

What software versions are currently installed on the relevant modules, and which versions correspond to the closed remedies for each open campaign?

Request this answer in writing from the service advisor before authorizing repair work. The full playbook covers documentation procedures and post-service verification steps.

Can all open campaigns be addressed in a single visit, or are sequential visits required?

Request this answer in writing from the service advisor before authorizing repair work. The full playbook covers documentation procedures and post-service verification steps.

Are any of the campaigns being delivered as over-the-air updates, and has VIN [VIN] received them?

Request this answer in writing from the service advisor before authorizing repair work. The full playbook covers documentation procedures and post-service verification steps.

app / playbooks / Chevrolet Blazer EV — software update issue

elevated severity software update issue 2024 dealer

Chevrolet Blazer EV software update issue (2024)

Chevrolet Blazer EV · 2024 · all trims

Diagnostic code reference

Reading codes off a Chevrolet Blazer EV service invoice? Look them up in our OBD-II DTC database →

Reported symptoms

Infotainment screen blank, unresponsive, or rebooting unexpectedly
Charging session refuses to initiate, terminates early, or fails to ramp to expected speed
Cluster or driver-information display flickering, partially blank, or showing intermittent warnings
Backup camera image fails to display or appears late on the infotainment screen
myChevrolet app reports vehicle as offline or shows feature inconsistencies
Vehicle delivered with restrictions (charging speed limited, features disabled) pending future software update

Questions to ask

Pose these to the service advisor at intake. Request answers in writing or via email.

How many open recall and software campaigns currently apply to VIN (Vehicle Identification Number) [VIN], and which display, infotainment, charging, or assist-system function does each address?
Was VIN [VIN] subject to the late-2023 production hold, and if so, what work was performed before delivery?
What software versions are currently installed on the relevant modules, and which versions correspond to the closed remedies for each open campaign?
Can all open campaigns be addressed in a single visit, or are sequential visits required?
Are any of the campaigns being delivered as over-the-air updates, and has VIN [VIN] received them?
Will the repair order list each campaign reference number applied during the visit and confirm closure for each?

Documents to request

Each item should be received in writing before authorizing repair work.

Diagnostic report listing all stored, pending, and historical fault codes from the affected modules
Repair order with technician notes, including a list of every campaign reference number addressed during the visit
Written confirmation of software versions installed before and after the visit on each affected module
Written confirmation of which campaigns are now closed for VIN [VIN] following the visit
Schedule of any remaining open campaigns and the expected timeline for their remedy

Pre-service evidence

Capture before drop-off. Once the vehicle leaves your possession, proving prior condition becomes significantly harder.

Screenshot or video-record any display, camera, infotainment, or charging defects at the time they occur
Save records of failed charging sessions, including session ID, network, and timestamp
Note specific incidents — system reboots, charging failures, cluster anomalies — with dates and circumstances
Save all Chevrolet correspondence regarding production holds, recall campaigns, or feature delivery timelines
Screenshot the myChevrolet app status pages over time, showing any reported errors
If multiple service visits are required, retain documentation from each visit as part of a complete record

Service advisor interaction

Operational notes specific to the conversation at the service desk.

Record the full name of the service advisor and the technician performing the work
Multiple open campaigns require explicit confirmation of which were addressed during this visit and which remain open. A general 'all software updated' statement does not document which specific campaigns are closed.
Note whether each campaign is classified as a recall, a customer satisfaction program, or a service bulletin — these classifications carry different documentation and warranty implications
If the advisor states that an OTA (Over-the-Air software update) update has been delivered for VIN [VIN] but the vehicle still shows the affected behavior, request written documentation of the diagnostic steps before any release

Repair authorization

Cautions before signing.

Recall remedies are performed at no charge to the owner; do not authorize any charge for parts or labor associated with the documented recalls
Chevrolet dealers may schedule recall remedies across multiple visits for parts availability or technician scheduling reasons; this is acceptable but should be documented through correspondence retention rather than verbal commitments
If a diagnostic fee is presented for issues the dealer characterizes as unrelated to the open recalls, request written documentation distinguishing recall-related and unrelated faults before authorization
Repair authorization signatures often include language permitting additional related work — read the document and decline blanket additional work in advance

Post-service verification

Complete before leaving the service location. Issues that surface after departure are operationally harder to attribute to the visit.

Verify the infotainment screen functions normally and does not reboot unexpectedly during a short test drive
Verify the backup camera image displays immediately upon shifting into reverse, with correct orientation
Conduct a verified DC fast charging session at an authorized fast charger before traveling more than a short distance from the dealership
Confirm no warning messages or system errors on the cluster after a full ignition cycle
Verify the myChevrolet app reflects accurate vehicle status with no reported errors
Confirm the repair order lists each closed campaign and any campaigns that remain open

Email templates

Documentation-focused templates for service correspondence. Tap copy to use. Subject and body are kept verbatim — paste them as-is into your email client.

pre-service inquiry

to: dealer service

Service inquiry — Blazer EV software, request for written campaign list and scope

Service Department, I am scheduling my [YEAR] Chevrolet Blazer EV, VIN [VIN], for service related to software-based recall campaigns. Before the visit, I am requesting written confirmation of the following: 1. A list of every open recall campaign currently applying to VIN [VIN], including the campaign reference number and a brief description of the function addressed by each. 2. Whether VIN [VIN] was subject to the late-2023 production hold, and if so, the work that was performed before delivery. 3. Whether all open campaigns can be addressed in a single visit, or whether sequential visits are required. 4. Whether any of the campaigns are being delivered as OTA updates, and if so, whether VIN [VIN] has already received them. Please reply to this email so the planned scope is on record. Thank you, [NAME]

documentation request

to: dealer service

Documentation request — Blazer EV recall service on [DATE], VIN [VIN]

Service Department, Following the service performed on [DATE] for VIN [VIN], I am requesting the following documents for my ownership records: 1. The full diagnostic report including all stored, pending, and historical fault codes. 2. The repair order listing every campaign reference number addressed during this visit. 3. Written confirmation of which campaigns are now closed for this VIN and which remain open. 4. Written confirmation of the software versions installed on each affected module before and after the visit. These documents form part of the vehicle's service record and are operationally important across multiple visits. Please reply to this email at your convenience. Thank you, [NAME]

Warranty notes

Chevrolet has issued multiple recalls and service campaigns affecting the Blazer EV during the early production period. The applicable campaigns for VIN [VIN] should be checked at every service visit.
Software-only remedies do not consume warranty time; the standard New Vehicle Limited Warranty period continues independently of recall remedies.
Recall remedies are performed at no charge to the owner regardless of vehicle age, mileage, or warranty status. A recall remains open until performed.
Vehicles affected by the late-2023 production hold may have additional documentation in their service history; this documentation is part of the complete vehicle record and should be retained.

Observational patterns

Production holds — periods during which a manufacturer suspends new vehicle deliveries to address known defects — produce parallel records distinct from recall remedies. Vehicles delivered after a production hold may have had pre-delivery work that should be documented in the service record.

Multiple-campaign situations are particularly susceptible to incomplete documentation. A general 'software updated' note without enumerated campaign references creates ambiguity about which specific campaigns are closed.

Cross-platform software defects across the GM Ultium platform have produced parallel campaigns affecting Hummer EV, Cadillac Lyriq, Chevrolet Equinox EV, Chevrolet Silverado EV, and other related vehicles. Single-vehicle campaign coverage may not capture all relevant remedies for shared software stacks.

OTA delivery does not always produce a corresponding entry in the dealer-side service record. The closure of a recall delivered over the air requires explicit documentation through the dealer system.

Linked recalls

gm-ultium-fmvss-101-111-305

This playbook covers

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