GM OEM Power Seat Lumbar Adjuster Switch Knob — 2017-2022 GMC Acadia | GM# 84494391 | Whisper Beige 4KB | General Motors OEM | Used
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🔧 GM OEM Power Seat Lumbar / Adjuster Switch Knob — 2022 GMC Acadia | GM# 84494391 | Whisper Beige | General Motors | Used
Used OEM power seat adjustment switch removed from a 2022 GMC Acadia (VIN: 1GKKNXLSXNZ153086). Features a large round dome-shaped knob in Whisper Beige (color code 4KB) mounted on a black rectangular housing with snap-clip mounting tabs. Two wiring connector ports on the back with blade terminals. Manufactured by General Motors for GM. Condition: Used, good condition.
⚙️ Key Features
- Power Seat Lumbar / Back Adjuster Switch — Round dome-style knob controls lumbar or seat back position adjustment (4-way or 2-way depending on seat configuration)
- Whisper Beige / Shale Knob — Color code 4KB, matches 2022 Acadia Denali/SLT Whisper Beige interior
- Two Connector Ports — Dual blade-terminal connector slots on housing back for wiring harness integration
- Snap-Clip Housing — Rectangular black housing with side mounting tabs for seat back panel integration
- Manufacturer: General Motors
📐 Specifications
- GM Part Number: 84494391
- Production Reference: 12090310028
- Knob Color: Whisper Beige / Shale — interior color code 4KB
- Connectors: 2 blade-terminal connector ports
- Manufacturer: General Motors
- Origin: General Motors OEM
- Donor Vehicle: 2022 GMC Acadia, VIN 1GKKNXLSXNZ153086
- Condition: Used OEM — good condition
✅ Vehicle Fitment
- 2022 GMC Acadia — Front seat with power lumbar / seat back adjuster and Whisper Beige interior — confirmed donor vehicle
- Likely also fits: 2017–2022 GMC Acadia SLT / AT4 / Denali with power lumbar seat and Shale / Whisper Beige interior (color code 4KB)
- May also fit: 2018–2022 Buick Enclave / Cadillac XT5 with matching power lumbar seat and Shale interior — verify part number before ordering
- ⚠️ This part number is not widely cataloged online. Verify GM# 84494391 against your existing switch and confirm knob color and connector count match your application before purchasing.
🔧 Installation Notes
- Located on the outboard side of the seat back (backrest) bolster panel
- Disconnect wiring connectors, release mounting clips from panel, swap switch
- Plug-and-play — no programming required
- Knob color is interior-specific — confirm your interior color code before ordering
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