Buick Regal 2018-2025 Owners Manual / Vehicle Care / Electrical System
Buick Regal: Electrical System
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Electrical System Overload
The vehicle has fuses and circuit
breakers to protect against an
electrical system overload.
When the current electrical load is
too heavy, the circuit breaker opens
and closes, protecting the circui
Engine Compartment Fuse
Block
To remove the fuse block cover,
squeeze the three retaining clips on
the cover and lift it straight up.
Caution:
Spilling liquid on any electrical
component on the vehicle may
damage it. Always keep
Instrument Panel Fuse
Block
The instrument panel fuse block is
in the instrument panel, on the
driver side of the vehicle. To access
the fuses, press in on the sides of
the cover and pull to release it from
the instrument panel
SEE MORE:
Brake Fluid
The brake master cylinder reservoir
is filled with GM approved DOT 4
brake fluid as indicated on the
reservoir cap.
Checking Brake Fluid
With the vehicle in P (Park) on a
level surface, the brake fluid level
should be between the minimum
and maximum marks on the brake
fluid reservoir.
There are on
Heated Oxygen and Oxygen Sensor Caution
CAUTION: Do not remove the pigtail from either the heated oxygen sensor
(HO2S) or
the oxygen sensor (O2S). Removing the pigtail or the connector will
affect sensor operation.
Handle the oxygen sensor carefully. Do not drop the HO2S. Keep the inline
electrical connector and the louvered end free of
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