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UNDERHOOD Fuse Block

Underhood fuse block is located on driver's side in the engine compartment. See Fig 1.

Fig 1: Locating Underhood Fuse Block
G00310270Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying Underhood Fuse Block Fuses And Relays
G00354885Courtesy of GENERAL MOTORS CORP.
UNDERHOOD FUSE BLOCK LEGEND

1 ECM Fuse 10A ECM
2-3 - - Not Used
4 RH HDLP Fuse 15A Headlamp - Right
5 A/C Fuse 10A A/C Relay
6-7 - - Not Used
8 ABS Fuse 10A EBCM (JM4)
9 ECM/ETC Fuse 15A ECM and ETC
10 EMISS Fuse 15A MAF/IAT, After Cooler Pump Relay, EVAP Canister Purge Solenoid, EVAP Canister Vent Solenoid, Coolant Level Switch, HO2S 1, and HO2S 2
11 IGN Fuse 10A ICM
12 - - Not Used
13 ECM Fuse 10A ECM
14 Boost Fuse 10A Boost Solenoid
15 BACK UP Fuse 10A PNP Switch (M43 or M75) or Backup Lamp Switch (M86)
16 INJECTORS Fuse 10A Fuel Injectors 1-4
17 - - Not Used
18 LH HDLP Fuse 15A Headlamp - Left
19 WIPER Fuse 25A WIPER Relay
20 HORN Fuse 10A HORN Relay
21 Radio 20A Audio Amplifier (UZ6)
22 ABS Fuse 20A EBCM (JM4)
23 RR DEFOG Fuse 30A REAR DEFOG Relay
24 A/C Clutch Relay - A/C Compressor Clutch
25 HORN Relay - Horn
26 - - Not Used
27 After Cooler Pump Relay - After Cooler Pump
28 RUN/CRANK (IGN1) Relay - Fuse Block - Underhood ABS, ECM, Boost, BACK UP, A/C Clutch Relay, Body Control Module AIR BAG, EPS/CRUISE, Clutch/Brake Fuses
29 Powertrain Relay - Fuse Block - Underhood ECM/ETC, IGN, Injectors and EMISS
30 COOLING FAN1 Relay - Cooling Fan
31 ECM CONT Relay - Starter
32 WIPER1 Relay - Wiper 2 Relay
33 WIPER2 Relay - Windshield Wiper Motor Assembly
34 REAR DEFOG Relay - Rear Window Defogger Grid
35 AC DIODE - A/C Compressor Clutch Circuit
36 - - Not Used
37 WIPER DIODE - Windshield Wiper Switch High Signal Circuit
38 RUN/CRANK Fuse 30A RUN/CRANK Relay
39 IP BATT1 Fuse 30A Body Control Module PARK, LIGHTER, DASH, BCM PWR, ONSTAR, RADIO Fuses and ACC Relay
40 ABS Fuse 40A EBCM (JM4)
41 IP BATT2 Fuse 40A Body Control Module FUELPUMP, STOP, CLUSTER, IGN SW, AND BCM ELECT Fuses
42 - - Not Used
43 EPS Fuse 60A EPS
44 COOLING FAN 2 Fuse 30A COOLING FAN 2 Relay
45 COOLING FAN 1 Fuse 30A COOLING FAN 1 Relay
46 CRANK Fuse 30A ECM CONT Relay
47 IP B ATT 1A Fuse 30A Body Control Module PARK, LIGHTER, DASH, BCM PWR, ONSTAR, RADIO Fuses and ACC Relay
48 RUN (IGN3) Fuse 30A Body Control Module RUN RELAY
49 - - Fuse Puller