Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC2020ACADIA SLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 177 (LIGHTING SYSTEM - REPAIR INSTRUCTIONS)
2020 GMC Acadia SL
Section 177 (Lighting System - Repair Instructions)
2020 GMC Acadia SLSECTION Section 177 (Lighting System - Repair Instructions)
WARNING: This page is about a different car, the 2021 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
- Repair Instructions
- Brake Pedal Position Sensor Calibration
- Brake Pedal Position Sensor Replacement
- Hazard Warning Switch Replacement
- Dimmer Switch Replacement
- Front Floor Courtesy Lamp Replacement - Left Side
- Front Floor Courtesy Lamp Replacement - Right Side
- Front Side Door Inside Handle Illumination Lamp Replacement
- Rear Side Door Inside Handle Illumination Lamp Replacement
- 3rd Row Seat Position Center Reading and Courtesy Lamp Replacement
- Rear Seat Position Center Reading and Courtesy Lamp Replacement
- Sunshade Illuminated Mirror Lamp Bulb Replacement
- Sunshade Illuminated Mirror Lamp Lens Replacement
- Outside Rearview Mirror Turn Signal Lamp Replacement
- Front Headlamp Replacement - Left Side
- Front Headlamp Replacement - Right Side (LSY)
- Front Headlamp Replacement - Right Side (LCV)
- Front Headlamp Replacement - Right Side (LGX)
- Low Beam Headlamp Bulb Replacement - Left Side (T4A)
- Low Beam Headlamp Bulb Replacement - Left Side (T4F)
- Low Beam Headlamp Bulb Replacement - Right Side (T4A)
- Low Beam Headlamp Bulb Replacement - Right Side (T4F)
- Front Headlamp Aiming
- Front Fog Lamp Replacement
- Front Fog Lamp Bulb Replacement
- Front Fog Lamp Aiming
- Turn Bulb Replacement
- High Mount Stop Lamp Replacement
- Rear Body Structure Stop Lamp Replacement
- Backup Bulb Replacement
- Backup Lamp Wiring Harness Replacement
- Rear License Plate Lamp Replacement
- Rear License Plate Lamp Module Replacement (with CWA)
- Rear License Plate Lamp Module Replacement (without CWA)
- Rear License Plate Lamp Bulb Replacement
- Rear License Plate Lamp Wiring Harness Replacement
- Rear Closure Auxiliary Signal Lamp Replacement
- Rear Closure Hands Free Lamp Replacement
- Rear Fascia Lower Signal Lamp Replacement
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.