B000A: GM Park Switch / Shift to Park Signal (manufacturer-specific)
Severity: medium
What it means: A GM body code that GM's bulletin 19-NA-206 ties to the intermittent 'Shift to Park' message. The park switch in the shifter isn't signaling the body control module that the car is in Park.
Safe to drive? Drivable, but the car may not shut off fully and can drain the battery overnight. Always confirm it's really in Park before walking away.
Common symptoms
- 'Shift to Park' message while already in Park
- Car won't fully turn off
- Dead battery the next morning
Likely causes, ranked
- Worn park switch in the shifterDIY or shop
- Shifter wiring harnessShop
- Weak battery after repeated drainsDIY
Vehicle-specific notes
- 2016–2019 Chevrolet Malibu: GM bulletin 19-NA-206 says technicians may find B000A with the intermittent Shift to Park message, and lists a new park switch and shifter harness. Read the full answer · Source
What it means: A GM body code that GM's bulletin 19-NA-206 ties to the intermittent 'Shift to Park' message. The park switch in the shifter isn't signaling the body control module that the car is in Park.
Severity: Medium. Safe to drive? Drivable, but the car may not shut off fully and can drain the battery overnight. Always confirm it's really in Park before walking away.
DIY or shop?
DIY for handy owners who order the right switch and harness; shop if you're not comfortable taking the console apart.
Before you replace parts
- Ask the dealer about GM bulletin 19-NA-206.
- Test the battery if it has been drained repeatedly.
- Never bypass the park switch by joining its wires.
- Clear the code only after a repair, then confirm it stays off.
Safety / mechanic note
Verify with a mechanic. A car that won't shut off can drain the battery and leave you stranded. A code points to a circuit or system, not always a specific part.