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OBD code information sheet

https://dvireports.com/b0009/gmc

Fault codes DVI Reports
B0009GMC

Park Switch Circuit Open

Safe to keep driving?Risk not classifiedDepends on symptoms

A supported severity assessment is not available for this code. The code alone cannot establish safe driving. Stop for red warnings, low oil pressure, overheating, abnormal braking or severely rough running.

LowCautionCritical

No green/yellow/red level was assigned without sufficient evidence.

System groupBody & comfort
Selected definitionGMC2 definitions availableChange

Choose the make reported by the scan tool or vehicle documentation. The same code can have different manufacturer meanings.

CadillacChevroletGMC

Technical explanation

An open connection has been detected in the 'Park' position switch circuit. Manufacturer-specific definition; confirm applicability in the service information for the exact vehicle.

Check the fuses before ordering a part

An OBD code describes a detected condition; it does not tell you which part to replace. Start with the fuse for the affected circuit.

Find the fuse for your vehicleChoose the make and model, then look up the fuse position in the catalogue.

If the fuse is good, carry on like this:

  1. Check the relevant supplies and connectionsWhere the diagnostic procedure calls for electrical checks, verify supply, ground and connectors under the manufacturer’s activation conditions.
  2. Run the specified component testUse the manufacturer’s test for this code and component before deciding it has failed.
  3. Order only after the fault is demonstratedReplace a part only when the prescribed tests identify it as defective.
Check details
  • Identify the circuit and any relevant fuse: Confirm the vehicle, engine, code meaning and stored operating conditions first. A fuse link is a location aid, not evidence that the fuse caused this code. Use the specified type and rating; do not repeatedly replace a fuse that opens.
  • Check the relevant supplies and connections: Use the specified engine state, circuit conditions and expected values. Have live measurements performed by someone qualified. For non-electrical faults, follow the relevant mechanical, fluid, pressure or leak checks instead.
  • Run the specified component test: Do not apply a generic resistance range. Any resistance or continuity test requires a de-energized circuit and an isolated component, with the correct pins and temperature from the procedure. Some components need a different kind of test.
  • Order only after the fault is demonstrated: If results are normal, continue the relevant wiring, control, mechanical or intermittent diagnosis. Check for related faults and verify the repair under the required conditions. A code or a completed checklist alone does not justify replacement.
Fluke · Continuity testing

If the procedure involves airbag/SRS, pretensioners or a high-voltage system, stop DIY testing and use qualified service. Do not probe these circuits with a multimeter.

Vehicle experiences and cases

User-reported cases published after moderation. Approval does not verify the diagnosis; the same code can have different causes.

No experiences have been published for this definition yet. You can be the first to share the checks and outcome.

See all vehicle experiences

Manuals, components and vehicle guides

Find the relevant procedure in the workshop manual for your vehicle. A fault code alone does not identify a failed part, powertrain or exact schematic.

Find workshop manual / diagramRelated issues and checks

Manuals open at their original source. Exact diagram availability depends on the build year, engine and manufacturer access.

Body and comfort

General system guidance · not a confirmed diagnosis

Door, window, climate and restraint codes refer to different functions. Confirm the affected subsystem first.

The association is based on the imported description. This information explains the system; it does not confirm a procedure for the exact code, model or engine. Verify applicability in manufacturer documentation.

Manufacturer-specific definition: verify its meaning and subtype with a compatible tool before using this general guide.

Checks for this type of system

  1. Identify the reporting module and feature.
  2. Record symptoms and recent work on the equipment.
  3. Have relevant power, commands and mechanical operation checked.

Useful diagnostic data, where available

  • Available switch and actuator positions or states.
  • Module power and messages for the affected subsystem.

Normal values and thresholds vary by vehicle and are not assumed here.

Mistakes to avoid

  • Do not force jammed powered mechanisms.
  • Never treat airbags or pretensioners like ordinary comfort components.
System-guide sources

References support general principles, not individual verification of every associated code.

Vehicle associations in the catalogue

Catalogue associations help searching and do not confirm code applicability for every model, year and engine combination. Check the vehicle service information.

Make

GMC

Continue your research

Links to related systems, warning lights and vehicle examples.

Read the code with an OBD scanner

Similar codes

B0000Risk not classified

Manufacturer-specific: GMC

Vehicle Speed Information Circuit

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Open sheet
B0006Risk not classified

Manufacturer-specific: GMC

Park Switch Circuit

Body & comfort

Open sheet
B0007Risk not classified

Manufacturer-specific: GMC

Park Switch Circuit Low Voltage

Body & comfort

Open sheet
Report a problem

What should be corrected in this sheet? Do not include names, phone numbers, registration plates or VINs.

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