GM Shift to Park while already in Park: separate harness and shifter branches. See the manufacturer document, vehicle conditions, exclusions and questions for a qualified shop before assuming a repair.
This is a research summary of a manufacturer communication, not a diagnosis for your car, a DIY repair procedure or confirmation of warranty or recall eligibility. No qualified technician has approved a repair for your individual vehicle here.
This historical communication is conditional. The current revision, VIN/build eligibility, measured diagnosis and any warranty or recall decision are not established here. Ask the manufacturer or a qualified shop to check the complete current document.
Read the General Motors original: Intermittent Shift to Park · Check open recalls by VIN at NHTSA Source date: 2019-09; research checked: 2026-11-01.
What prompted this manufacturer document
- Shift to Park remains after selecting Park
- No-start in the newer bulletin
- Both bulletins concern park-switch recognition, but their year cohorts and repairs differ. They are retained as one symptom family, not duplicate articles.
Which vehicle conditions must be checked
Each row below retains its own conditions. Do not combine engines, years or models across rows to create new applications. A listed model is not proof that a particular VIN is affected.
- Chevrolet Blazer · 2019
- Chevrolet Malibu · 2016, 2017, 2018, 2019
- Chevrolet Traverse · 2018, 2019
- Chevrolet Volt · 2016, 2017, 2018, 2019
- GMC Acadia · 2017, 2018, 2019
- Buick Encore GX · 2020, 2021, 2022, 2023
- Chevrolet Trailblazer · 2021, 2022, 2023
- Chevrolet Malibu · 2020, 2021, 2022, 2023
Codes recorded in this document
A root listed only as an appearance has no separately verified meaning here. Preserve every suffix and module name; a shared root does not transfer a repair branch to another vehicle.
| Root | Raw form | Meaning in this source, if established |
|---|---|---|
| B000A | B000A | Appears in the document; individual meaning not verified |
What an owner can record safely
- Exact displayed message and whether the vehicle shuts down
- Whether Park engagement feels normal
- Connector type must be checked by the repairer
Editorial safety boundary for this system
Verify the vehicle is secured; do not leave it unsecured when Park or shutdown is uncertain.
- Use current model-specific service information, calibrated equipment and a qualified technician for the selected diagnostic branch.
- Use the parking brake as instructed by the owner manual; no shift-interlock bypass or untrained console disassembly.
This is a conservative editorial policy, not a manufacturer safe-to-drive decision for a specific vehicle.
What the source does not prove
- Do not invert the NOT-damaged terminal condition. Four-pin and six-pin controls are not interchangeable.
- A code or message alone does not establish a failed part, a safe-to-drive decision or an approved repair for this VIN.
- A service bulletin is not automatically a recall or free warranty repair. Confirm current eligibility directly.
Questions for the repair shop
- Which current manufacturer procedure, VIN/RPO/build gate and test result determine the diagnostic branch?
- Does a later revision or a current recall change the source's original advice?
- What measurement or inspection confirms the cause, and how will the repair be verified?
Open source-review issue
- Q3-09: Later GM source uses a NOT-damaged/spread-terminal condition. Preserve the logical negation and connector pin-count part branches; do not invert the repair condition.
The uncertain field is not used here to claim a current fitment, repair or market-wide failure.
Read the original record
The linked communication may be revised after the research date. Compare its document number, exact vehicle table, diagnostic preconditions and exclusions with a qualified technician. This page paraphrases selected facts and does not reproduce the manufacturer procedure.
Sources and scope
- General Motors — Intermittent Shift to Park (19-NA-206) Document: 2019-09 · Research checked: 2026-11-01
- General Motors — Newer Shift to Park B000A terminal inspection branch (23-NA-119) Document: 2024-09 · Research checked: 2026-11-01
Research snapshot: 2026-11-01. Source documents may have newer revisions. Verify current instructions and VIN eligibility with the manufacturer.