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Bottom UNDERHOOD Compartment Fuse Block

NOTE: Bottom underhood compartment fuse box is located on passenger's side of engine compartment. See Figure.
Fig 1: Identifying Bottom Underhood Fuse Block
G00056791Courtesy of GENERAL MOTORS CORP.
UNDERHOOD BOTTOM FUSE BLOCK CIRCUIT IDENTIFICATION (2004) (1 OF 2)

Relays Usage
FAN CONT #3 RELAY Secondary Cooling Fan (Passenger's Side)
FAN CONT #2 RELAY Cooling Fan Control Relay
FANT CONT #1 RELAY Primary Cooling Fan (Driver's Side)
IGN RELAY Ignition Relay
A/C CMPR RELAY HVAC Compressor
UNDERHOOD BOTTOM FUSE BLOCK CIRCUIT IDENTIFICATION (2004) (2 OF 2)

Fuses Usage
IGN SW Ignition Switch
RT I/P #3 Rear Defogger, Audio System
U/HOOD #2 Ignition Relay, AIR Pump
COOLING FANS Cooling fans (Battery)
FAN CONT #2 & #3 Relays #2 & #3
FAN CON #1 Cooling Fan Control Relays #1
FUEL INJ Fuel Injectors
TRANS SOL Transmission Solenoids
A/C RLY (COIL) HVAC Control Relay
ENG DEVICES Canister Purge Solenoid, Mass Air Flow Sensor (MAF), AIR Pump Relay & Valve Control
DFI MDL Direct Fire Ignition Module
OXY SEN Oxygen Sensors (Pre and Post Converter)