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X50A Fuse Block - Underhood Top View

GM5201863Courtesy of GENERAL MOTORS COMPANY
Usage Table

No. Device Label Name Device Assigned Name Rating Description
Fuses 
1 L/GATE F01UA 10 A
  • KR95A Liftgate Unlatch Relay
2 - F02UA -
  • Not Used
3 REAR DEFOG F03UA 25 A
  • E18 Rear Defogger Grid
4 OSRVM HTR F04UA 10 A
  • A9A Outside Rearview Mirror - Driver
  • A9B Outside Rearview Mirror - Passenger
5 S/ROOF F05UA 20 A
  • K61 Sunroof Control Module (CF5)
6 TCM F06UA 15 A
  • KR157 Transmission Control Module Relay
7 MAF/IAT F07UA 15 A
  • B52B Heated Oxygen Sensor 2
  • B75C Multifunction Intake Air Sensor
  • K20 Engine Control Module
8 - F08UA -
  • Not Used
9 ABS VLV F09UA 30 A
  • K17 Electronic Brake Control Module
10 BATT RVC F10UA 5 A
  • K9 Body Control Module
11 REAR CAMERA F11UA 10 A
  • B87 Rearview Camera
12 - F12UA -
  • Not Used
13 - F13UA -
  • Not Used
14 ECM/TCM R/C F14UA 15 A
  • K20 Engine Control Module
  • K71 Transmission Control Module (MR8)
15 ICM/STRTR2 RLY F15UA 15 A
  • KR27 Starter Relay
16 FUEL PUMP MTR F16UA 15 A
  • KR23A Fuel Pump Relay
17 ECM1 F17UA 15 A
  • B52A Heated Oxygen Sensor 1
  • K20 Engine Control Module
  • Q12 Evaporative Emission Purge Solenoid Valve
  • Q44 Engine Oil Pressure Control Solenoid Valve
18 - F18UA -
  • Not Used
19 - F19UA -
  • Not Used
20 A/C CLTCH F20UA 15 A
  • Q2 A/C Compressor Clutch
21 IBS F21UA 5 A
  • B110 Battery Sensor Module
22 ESCL F22UA 7.5 A
  • K60 Steering Column Lock Module
23 FAN LO F23UA 20 A
  • KR20C Cooling Fan Low Speed Relay
24 REAR VKS F24UA 5 A
  • B342B UHF Low Energy Remote Control Access Sensor Transceiver 2 (BOP)
  • B342D UHF Low Energy Remote Control Access Sensor Transceiver 4 (BOP)
25 OSRVM MTR CNTRL F25UA 7.5 A
  • S52 Outside Rearview Mirror Switch
26 ECM/TCM B+ F26UA 15 A
  • K20 Engine Control Module
27 CNSTR VENT SOL F27UA 10 A
  • Q13 Evaporative Emission Vent Solenoid Valve
28 - F28UA -
  • Not Used
29 AOS F29UA 5 A
  • K85 Passenger Presence Module (AL0)
30 HDLP LVL MTR F30UA 10 A
  • M29L Headlamp Leveling Actuator - Left
  • M29R Headlamp Leveling Actuator - Right
31 HORN F31UA 15 A
  • P12 Horn (UTJ)
32 FRT FOG F32UA 15 A
  • E29LF Fog Lamp - Left Front (T3U)
  • E29RF Fog Lamp - Right Front (T3U)
33 HI BEAM LT F33UA 15 A
  • E4E Headlamp - Left High Beam (SBM/SBV/SBW)
34 HI BEAM RT F34UA 15 A
  • E4F Headlamp - Right High Beam (SBM/SBV/SBW)
35 - F35UA -
  • Not Used
36 REAR/WIPER F36UA 20 A
  • KR7 Rear Wiper Relay
  • M45 Rear Wiper Motor
37 - F37UA -
  • Not Used
38 WASH MTR F38UA 10 A
  • KR11 Windshield Washer Pump Relay
  • KR6 Rear Window Washer Pump Relay
39 - F39UA -
  • Not Used
40 - F40UA -
  • Not Used
41 FRT VKS F41UA 5 A
  • B342A UHF Low Energy Remote Control Access Sensor Transceiver 1 (BOP)
  • B342C UHF Low Energy Remote Control Access Sensor Transceiver 3 (BOP)
42 STRTR SOL2 F42UA 40 A
  • KR27 Starter Relay (KL9)
43 IEC F43UA 30 A
  • X51A Fuse Block - Instrument Panel
44 DC_DC TRANS F44UA 40 A
  • T19 Power Supply Transformer (KL9)
45 STRTR SOL1 F45UA 30 A
  • KR27 Starter Relay
46 ABS PUMP F46UA 50 A
  • K17 Electronic Brake Control Module
47 FAN HI F47UA 40 A
  • KR20D Cooling Fan High Speed Relay
48 FRT WIPER F48UA 30 A
  • KR12B Windshield Wiper Relay
49 ACC/RAP F49UA 40 A
  • KR76A Retained Accessory Power Relay 1
  • KR76B Retained Accessory Power Relay 2
Relays 
1 REAR DEFOG RELAY KR5 Rear Defogger Relay -
  • F03UA Fuse
  • F04UA Fuse
2 TCM RELAY KR157 Transmission Control Module Relay -
  • K71 Transmission Control Module
3 FUEL PUMP MTR RLY KR23A Fuel Pump Relay -
  • G12 Fuel Pump
4 STRTR SOL2 KR27C Starter Pinion Solenoid Actuator Relay -
  • M64 Starter Motor (KL9)
5 A/C CLUTCH RLY KR29 A/C Compressor Clutch Relay -
  • F20UA Fuse
6 - - -
  • Not Used
7 FAN LO RLY KR20C Cooling Fan Low Speed Relay -
  • R10 Cooling Fan Resistor
8 RUN/CRANK RLY KR73 Ignition Main Relay -
  • F11UA Fuse
  • F13UA Fuse
  • F14UA Fuse
  • F15UA Fuse
  • F22UA Fuse
  • F30UA Fuse
  • F43UA Fuse
9 PWR/TRN RLY KR75 Engine Controls Ignition Relay -
  • F07UA Fuse
  • F17UA Fuse
  • F29UA Fuse
  • F18UA Fuse
  • KR29 A/C Compressor Clutch Relay
10 STRTR SOL1 RLY KR27 Starter Relay -
  • M64 Starter Motor
11 FAN HI RLY KR20D Cooling Fan High Speed Relay -
  • G10 Cooling Fan Motor
12 - - -
  • Not Used
Note: Relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the block. 
- - KR3 Horn Relay -
  • F31UA Fuse
- - KR48 Headlamp High Beam Relay -
  • F33UA Fuse
  • F34UA Fuse
- - KR46 Front Fog Lamp Relay -
  • F32UA Fuse
- - KR42L Daytime Running Lamp Relay - Left -
  • E4C Daytime Running Lamp - Left (SBW)
  • E4G Headlamp - Left Low Beam (SBM/SBV/SBW)
- - KR42R Daytime Running Lamp Relay - Right -
  • E4D Daytime Running Lamp - Right (SBW)
  • E4H Headlamp - Right Low Beam (SBM/SBV/SBW)
- - KR11 Windshield Washer Pump Relay -
  • G24 Windshield Washer Pump
- - KR6 Rear Window Washer Pump Relay -
  • G24 Windshield Washer Pump
- - KR7 Rear Wiper Relay -
  • M45 Rear Wiper Motor
- - KR12B Windshield Wiper Relay -
  • KR12C Windshield Wiper Speed Control Relay
- - KR12C Windshield Wiper Speed Control Relay -
  • M75 Windshield Wiper Motor
- - KR95A Liftgate Unlatch Relay -
  • M30 Liftgate Latch
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