Chevrolet 2001 Impala Owner's Manual page 352

Underhood Fuse Block (Upper)
Some fuses are in a fuse block on the passenger's side of the
engine compartment. See "Engine Compartment Overview"
in the Index for more information on location.
Circuit Relay Description
FUEL PUMP Fuel Pump
DRL RELAY Daytime Running Lamps
A.I.R. RELAY Air Induction Reaction Relay
CRANK RLY Starter (Crank) Relay
HORNS Horn
FOG LTS Fog Lamps
Maxi Fuses Description
LEFT I/P Left Bussed Electrical
Center (Battery)
RT I/P #1 Right Bussed Electrical
Center (Battery)
RT I/P #2 Right Bussed Electrical
Center (Battery)
U/HOOD #1 Underhood (Top) Electrical Center
Mini Fuses Description
HORN RLY Horn Relay
BLANK Blank
BLANK Blank
FOG RLY Fog Lamp Relay
F/PMP RLY Fuel Pump Relay
DRL/EXIT LTS Low (Left Front) & High
(Left Front) Headlamps
EXT LTS Low (Right Front) & High
(Right Front) Headlamps
PCM PCM Battery
A/C RLY HVAC Compressor
(CMPR) Relay & Generator
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