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Electrical Center Identification Views

Fig 1: X50A Fuse Block - Underhood, Label
G00672268Courtesy of GENERAL MOTORS CORP.
X50A FUSE BLOCK - UNDERHOOD, FUSE AND RELAY IDENTIFICATION LEGEND

No. Device Label Name Fuse And Relay Description Rating Circuits
1 COOL FAN I Fuse F1UA Fuse 30A (LAF) Cooling Fan Low Speed Relay
25A (LF1)
2 COOL FAN II Fuse F2UA Fuse 40A (LAF) Cooling Fan High Speed Relay
25A (LF1)
3 REAR DEFOG Fuse F3UA Fuse 30A Rear Defogger Grid
4 WNDW RT Fuse F4UA Fuse 30A Window Switch - Passenger and Window Switch - Right Rear
5 MSM Fuse F5UA Fuse 40A Seat Memory Control Module (LTZ or SLT)
6 PWR SEAT LT Fuse F6UA Fuse 30A Seat Adjuster Switch - Driver
7 I/P BEC #1 Fuse F7UA Fuse 60A F4DA, F8DA, F10DA, F12DA, F16DA, F30DA, F34DA, and F40DA Fuses
8 I/P BEC #2 Fuse F8UA Fuse 60A F6DA, F20DA, F29DA, F31DA, F32DA, F33DA, F35DA, F36DA, F37DA, and F38DA Fuses
9 STRTR Fuse F9UA Fuse 30A Starter Motor
10 BRK/BSTR Fuse F10UA Fuse 40A Brake Booster Pump Motor Relay
11 S/ROOF Fuse F11UA Fuse 30A Sunroof Motor (CF5)
12 ABS PUMP Fuse F12UA Fuse 40A Electronic Brake Control Module
13 I/P BEC #3 Fuse F13UA Fuse 60A Accessory Relay, Logistic Mode 1 Relay (EXP)
Accessory Relay, F5DA, F7DA, F9DA, F11DA, F15DA, and F19DA Fuses (without EXP)
14 WNDW LT Fuse F14UA Fuse 30A Window Switch - Driver and Window Switch - Left Rear
15 ABS MDL Fuse F15UA Fuse 20A Electronic Brake Control Module
16 TCM BATT Fuse F16UA Fuse 15A Automatic Transmission Assembly
17 PRK/LGHT Fuse F17UA Fuse 15A Trailer Connector (V92)
18 ECM BATT Fuse F18UA Fuse 10A Engine Control Module
19 HTD MIR Fuse F19UA Fuse 10A Outside Rearview Mirror - Driver (DL8 or DL9), Outside Rearview Mirror - Passenger (DL8 or DL9)
20 TRLR LT Fuse F20UA Fuse 10A Trailer Connector (V92)
21 LGM Fuse F21UA Fuse 30A Liftgate Control Module (TB5)
22 PWR LUM Fuse F22UA Fuse 20A Seat Lumbar Support Switch - Driver
23 TRLR RT Fuse F23UA Fuse 10A Trailer Connector (V92)
24 CNSTR VENT Fuse F24UA Fuse 10A Evaporative Emission Vent Solenoid Valve
25 MIR MM Fuse F25UA Fuse 7.5A Mirror Control Module - Left (LTZ or SLT), Outside Rearview Mirror Switch (without LTZ or SLT)
26 RVC BATT SNSR F26UA Fuse 5A Body Control Module
27 REAR ACCY PWR OUTLET Fuse F27UA Fuse 20A Accessory Power Receptacle - Rear
28 WPR Fuse F28UA Fuse 25A Windshield Wiper Speed Control Relay, Windshield Wiper Relay
29 REAR/WPR Fuse F29UA Fuse 20A Rear Wiper Relay
30 A/C CMPRSR Fuse F30UA Fuse 10A A/C Compressor Clutch
31 REAR CLOSURE Fuse F31UA Fuse 15A Liftgate Release Relay
32 HORN Fuse F32UA Fuse 15A Horn - High Note, Horn - Low Note
33 RT HI BEAM Fuse F33UA Fuse 10A Headlamp - Right High Beam
34 LT HI BEAM Fuse F34UA Fuse 10A Headlamp - Left High Beam
35 EVEN INJ Fuse F35UA Fuse 20A Engine Control Module (LF1), Ignition Coil 2, Ignition Coil 4, and Ignition Coil 6 (LF1)
36 ODD INJ Fuse F36UA Fuse 20A Engine Control Module, Ignition Coil 1, Ignition Coil 3, and Ignition Coil 5 (LF1)
37 WSW Fuse F37UA Fuse 15A Rear Window Washer Pump Relay, Windshield Washer Pump Relay
38 FRT FOG LAMP Fuse F38UA Fuse 15A Fog Lamp - Left Front (T96), Fog Lamp - Right Front (T96)
39 O2 SNSR POST Fuse F39UA Fuse 15A Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 (LF1), Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 (LF1)
40 ECM Fuse F40UA Fuse 20A Engine Control Module
41 O2 SNSR PRE Fuse F41UA Fuse 15A Evaporative Emission (EVAP) Canister Purge Solenoid Valve, Heated Oxygen Sensor (HO2S) 1 (LAF), Heated Oxygen Sensor (HO2S) 2 (LAF), Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 (LF1), Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 (LF1), Mass Air Flow (MAF) Sensor/Intake Air Temperature (IAT) Sensor
42 TCM Fuse F42UA Fuse 15A Automatic Transmission
43 MIR Fuse F43UA Fuse 7.5A Inflatable Restraint Passenger Air Bag On/Off Indicator, Inside Rearview Mirror (ISRVM)
44 CCM Fuse F44UA Fuse 10A Fuel Pump Flow Control Module
45 Not Used Not Used N/A Not Used
46 RDM Fuse F46UA Fuse 15A Rear Differential Clutch Control Module
47 LGM LOGIC Fuse F47UA Fuse 15A Liftgate Module (LGM) (TB5)
48 I/P BEC Fuse F48UA Fuse 25A HVAC, MIL, and SDM MDL IGN Fuses
49 HTD/SEAT FRT Fuse F49UA Fuse 25A Heated Seat Control Module (KA1 without LTZ or SLT), Memory Seat Module (MSM) (KA1 with LTZ or SLT)
50 CCM Fuse F50UA Fuse 25A Fuel Pump Flow Control Module
51 ECM Fuse F51UA Fuse 10A Engine Control Module
52 REAR CAM Fuse F52UA Fuse 5A Rearview Camera (UVC)
53 EPS F53UA Fuse 80A Power Steering Control Module (LAF)
54 REAR DEFOG Relay KR5 Rear Defogger Relay - Rear Defogger Relay
55 COOL FAN LO Relay KR20C Cooling Fan Low Speed Relay - Cooling Fan Low Speed Relay
56 HEAD LAMP HI Relay KR48 Headlamp High Beam Relay - Headlamp High Beam Relay
57 COOL FAN CNTRL Relay KR20E Cooling Fan Speed Control Relay - Cooling Fan Speed Control Relay
58 WPR ON/OFF CNTRL Relay KR12B Windshield Wiper Relay - Windshield Wiper Relay
59 A/C CMPRSR Relay KR29 A/C Compressor Clutch Relay - A/C Compressor Clutch Relay
60 WPR HI/LO SPD Relay KR12C Windshield Wiper Speed Control Relay - Windshield Wiper Speed Control Relay
61 FOG LAMP Relay KR46 Front Fog Lamp Relay - Front Fog Lamp Relay
62 ENG CNTRL Relay KR71 Engine Control Module Relay - Engine Control Module Relay
63 STRTR Relay KR27 Starter Relay - Starter Relay
64 RUN/CRNK Relay KR74 Ignition Run Relay - Ignition Run Relay
65 COOL FAN HI Relay KR20D Cooling Fan High Speed Relay - Cooling Fan High Speed Relay
66 BRK/BSTR Relay KR14 Brake Booster Pump Motor Relay - Brake Booster Pump Motor Relay
NOTE: Relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the block.
- - KR3 Horn Relay - Horn Relay
- - KR6 Rear Window Washer Pump Relay - Rear Window Washer Pump Relay
- - KR7 Rear Wiper Relay - Rear Wiper Relay
- - KR11 Windshield Washer Pump Relay - Windshield Washer Pump Relay
- - KR53 Park Lamp Relay - Park Lamp Relay
- - KR63L Trailer Stop/Turn Signal Lamp Relay - Left - Trailer Stop/Turn Signal Lamp Relay - Left
- - KR63R Trailer Stop/Turn Signal Lamp Relay - Right - Trailer Stop/Turn Signal Lamp Relay - Right
- - KR95A Liftgate Release Relay - Liftgate Release Relay
- - KR97 Door Lock Relay - Door Lock Relay
NOTE: Items listed below are Wiper/Washer system diagnostic test points.
67 TEST POINT (228A) - - Windshield Washer Pump
68 TEST POINT (392) - - Windshield Washer Pump
69 TEST POINT (393) - - Rear Wiper Motor
NOTE: Items listed below are Door Latch system diagnostic test points.
70 TEST POINT (6128) - - Liftgate Latch Assembly (without TB5)
71 TEST POINT (295) - - Door Latch Assembly - Left Rear, Door Latch Assembly - Passenger, and Door Latch Assembly - Right Rear
72 TEST POINT (3271) - - Door Lock Relay
Fig 2: X50A Fuse Block - Underhood, Top View
GM2367882Courtesy of GENERAL MOTORS CORP.
Fig 3: X50A Fuse Block - Underhood, Bottom View
GM2367883Courtesy of GENERAL MOTORS CORP.
Fig 4: X50A Fuse Block - Underhood X1
GM1876012Courtesy of GENERAL MOTORS CORP.
X50A Fuse Block - Underhood X1

Pin Wire Circuit Function
A1 0.5 PK/BK 5294 Battery Positive Voltage (LF1)
A2 0.5 YE 5991 Powertrain Relay Control
A3 0.5 PK/BK 5293 Ignition Voltage
A4 0.5 PU/WH 6386 Starter Relay Control
A5 0.5 PK 439 Ignition Voltage
A6 0.5 PK 2139 Ignition Voltage
B1 1 PK/BK 5290 Ignition Voltage (LAF)
2 PK/BK 5290 Ignition Voltage (LF1)
B2 0.5 PK/BK 5293 Ignition Voltage
0.5 PK/BK 5293 Ignition Voltage
B3 3 PU 6 Starter Solenoid Crank Voltage
C1 - - Not Used
C2 0.5 D-GN 335 Low Speed Cooling Fan Relay Control
C3 0.5 D-BU 473 High Speed Cooling Fan Relay Control
C4 0.5 D-GN/WH 459 A/C Compressor Clutch Relay Control
C5-C6 - - Not Used
D1 1 PK/BK 5292 Ignition Voltage
D2 0.8 PK/BK 5291 Ignition Voltage
1 PK/BK 5291 Ignition Voltage
E1 0.8 PK/BK 5292 Ignition Voltage (LF1)
E2 - - Not Used
E3 1 OG 1470 Supply Voltage
F1-F3 - - Not Used
G1 0.5 RD/WH 440 Battery Positive Voltage
G2 0.5 L-BU/WH 6311 Brake Pedal Switch Signal
H1-H2 - - Not Used
H3 0.5 D-GN 59 A/C Compressor Clutch Supply Voltage
H4 0.35 BK 250 Ground
H5 0.5 BN 6305 Vacuum Pump Relay Control
H6 - - Not Used
J1 - - Not Used
J2 0.5 RD/WH 1840 Battery Positive Voltage
J3 0.5 BN 6305 Vacuum Pump Relay Control
K1-K4 - - Not Used
K5 0.5 D-BU 5985 Serial Data Wake-Up Signal
K6 0.5 D-BU 5985 Serial Data Wake-Up Signal
Connector Part Information 
  • Harness: Engine
  • OEM: 15477784
  • Service: 88988752
  • Description: 40-Way F GT 150 280 Metri-Pack 800 Series (GY)
Terminal Part Information 
  • Pins: A1-A6, C2-C4, H3-H5, K5, K6
  • Terminated Lead: 13575735
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-2A (GY)
  • Terminal/Tray: 12191812/19
  • Core/Insulation Crimp: E/C
  • Pins: B1 (LAF), D2, E3
  • Terminated Lead: Pin 13575753
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-4A (PU)
  • Terminal/Tray: 15304711/8
  • Core/Insulation Crimp: 2/A
  • Pins: B1 (LF1), B3, D2
  • Terminated Lead: Pins: B1, D2 - 13575754
  • Terminated Lead: Pins: B3 - 13575756
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-4A (PU)
  • Terminal/Tray: 15304713/19
  • Core/Insulation Crimp: Pins: B1 - 4/4
  • Core/Insulation Crimp: Pins: B3 - F/D
  • Core/Insulation Crimp: Pins: D2 - Not Available
  • Pins: B2, G1, G2, J2, J3
  • Terminated Lead: 13575753
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-4A (PU)
  • Terminal/Tray: 15304711/8
  • Core/Insulation Crimp: E/A
  • Pins: E3
  • Terminated Lead: 13575465
  • Release Tool: J-38125-558
  • Diagnostic Test Probe: J-35616-44 (YE)
  • Terminal/Tray: 12065915/5
  • Core/Insulation Crimp: C/A
Fig 5: X50A Fuse Block - Underhood X2
GM1665658Courtesy of GENERAL MOTORS CORP.
X50A Fuse Block - Underhood X2

Pin Wire Circuit Function
A1 - - Not Used
A2 0.5 D-BU 5985 Serial Data Wake-Up Signal
A3 0.35 OG 2267 Mirror Heating Element Supply Voltage (DL8)
A4 0.35 L-BU/WH 6311 Brake Pedal Switch Signal
A5 - - Not Used
A6 0.35 OG 5186 Left Trailer Turn Signal Lamp Control (V92)
A7 0.35 YE 5187 Right Trailer Turn Signal Lamp Control (V92)
A8 0.8 L-BU 6128 Rear Closure Unlatch Motor Unlatch Control (without TB5)
B1 2 PU 293 Rear Defog Element Supply Voltage
B2 0.35 OG 2267 Mirror Heating Element Supply Voltage (DL8)
B3 0.5 BN 6305 Vacuum Pump Relay Control
B4 1 WH 393 Rear Window Wiper Motor Control
B5 0.5 BK 750 Ground
C1-C2 - - Not Used
C3 0.35 WH 193 Rear Defog Relay Control
C4 - - Not Used
C5 0.35 YE 5420 Rear Wiper Relay Control
C6 0.35 D-GN 5706 5-Volt Reference (without TB5)
C7 0.35 YE 5704 5-Volt Reference (without TB5)
C8 0.5 BK 750 Ground
D1 2 RD/WH 1340 Battery Positive Voltage
D2 0.8 YE 318 Left Rear Trailer Stop/Turn Lamp Supply Voltage (V92)
D3 0.8 D-GN 319 Right Rear Trailer Stop/Turn Lamp Supply Voltage (V92)
D4 0.5 RD/WH 2340 Battery Positive Voltage
D5 1 RD/WH 3040 Battery Positive Voltage
E1 3 RD/BK 1342 Battery Positive Voltage (LTZ or SLT)
E2 5 RD/BK 42 Battery Positive Voltage
F1 3 RD/WH 5040 Battery Positive Voltage
F2 5 RD/BK 1642 Battery Positive Voltage
G1 - - Not Used
G2 3 RD/WH 1540 Battery Positive Voltage (TB5)
G3 0.5 RD/WH 2440 Battery Positive Voltage
G4 1 RD/WH 4940 Battery Positive Voltage
G5 - - Not Used
H1-H7 - - Not Used
H8 0.5 TN 860 Front Windshield Wiper Switch High Signal
J1 0.8 BN 2109 Trailer Park Lamps Supply Voltage (V92)
J2 0.8 RD/WH 5240 Battery Positive Voltage
J3 0.5 RD/WH 1940 Battery Positive Voltage
J4 - - Not Used
J5 1 BK 350 Ground
K1 0.35 D-BU 45 Park Lamp Supply Voltage/Marker Lamp Supply Voltage
K2-K4 - - Not Used
K5 0.35 L-GN/BK 3267 Child Security Door Latch Relay Control
K6 0.35 GY 91 Wiper Relay Control
K7 - - Not Used
K8 1 D-BU/WH 3266 Rear Door Latch Control
Connector Part Information 
  • Harness: Body
  • OEM: 15477822
  • Service: 19115189
  • Description: 56-Way F GT 150 280 Metri-Pack 800 Series (BK)
Terminal Part Information 
  • Pins: A2-A4, A6-A8, C3, C5-C8, H8, K1, K5, K6, K8
  • Terminated Lead: 13575735
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-2A (GY)
  • Terminal/Tray: 12191812/19
  • Core/Insulation Crimp: Pins A2-A4, A6, A7, C3, C5-C8, H8, K1, K5, K6 - E/C
  • Core/Insulation Crimp: Pins A8, K8 - C/A
  • Pins: B1, D1, G1
  • Terminated Lead: Pins: B1, D1 - 13575754
  • Terminated Lead: Pins: G1 - 13575756
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-4A (PU)
  • Terminal/Tray: 15304713/19
  • Core/Insulation Crimp: Pins: B1, D1 - 4/4
  • Core/Insulation Crimp: Pins: G1 - F/D
  • Pins: B2-B5, D2-D5, G3, G4, J1-J3, J5
  • Terminated Lead: 13575753
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-4A (PU)
  • Terminal/Tray: 15304711/8
  • Core/Insulation Crimp: Pins B2, B3, B5, D4, G3, J3 - E/A
  • Core/Insulation Crimp: Pins B4, D2, D3, D5, G4, J1, J2, J5 - 2/A
  • Pins: E1, E2, F1, F2
  • Terminated Lead: 13575718
  • Release Tool: J-38125-558
  • Diagnostic Test Probe: J-35616-4A (PU)
  • Terminal/Tray: 12110127/19
  • Core/Insulation Crimp: F/G
Fig 6: X50A Fuse Block - Underhood X3
GM2399997Courtesy of GENERAL MOTORS CORP.
X50A Fuse Block - Underhood X3

Pin Wire Circuit Function
A1-A6 - - Not Used
B1 0.8 OG 228 Windshield Washer Pump Control
B2 0.8 D-GN 392 Rear Window Washer Pump Control
B3 3 BK 1150 Ground (LF1)
C1 0.8 D-GN 29 Horn Control
C2 0.8 D-GN 29 Horn Control
C3 0.8 L-GN/BK 311 Right Headlamp High Beam Supply Voltage
C4 0.5 D-GN/WH 711 Left Headlamp High Beam Supply Voltage
C5 0.5 PU 2234 Front Fog Lamp Supply Voltage (T96)
C6 - - Not Used
D1 - - Not Used
D2 2 WH 504 Cooling Fan Low Reference (LF1)
E1 3 L-BU 409 Cooling Fan Motor Supply Voltage (LAF)
2 L-BU 409 Cooling Fan Motor Supply Voltage (LF1)
E2 3 GY 532 Cooling Fan Motor Supply Voltage (LAF)
2 GY 532 Cooling Fan Motor Supply Voltage (LF1)
F1-F6 - - Not Used
G1 0.5 BK 1150 Ground
G2-G3 - - Not Used
H1-H6 - - Not Used
Connector Part Information 
  • Harness: Forward Lamp
  • OEM: 13640613
  • Service: 13574910
  • Description: 34-Way F ASM CONN 34 F GT 150 280 M/P 800 SLD (BK)
Terminal Part Information 
  • Pins: B1, B2, G1
  • Terminated Lead: 13575753
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-4A (PU)
  • Terminal/Tray: 15304711/8
  • Core/Insulation Crimp: Pins B1, B2 - 2/A
  • Core/Insulation Crimp: Pins G1 - E/A
  • Pins: B3
  • Terminated Lead: 13575756
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-4A (PU)
  • Terminal/Tray: 15304713/19
  • Core/Insulation Crimp: F/D
  • Pins: C1-C5
  • Terminated Lead: 13575735
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-2A (GY)
  • Terminal/Tray: 12191812/19
  • Core/Insulation Crimp: Pins C1-C3 - C/A
  • Core/Insulation Crimp: Pins C4, C5 - E/C
  • Pins: D2, E1, E2
  • Terminated Lead: 13575718
  • Release Tool: J-38125-558
  • Diagnostic Test Probe: J-35616-44 (YE)
  • Terminal/Tray: 12110127/19
  • Core/Insulation Crimp: F/G
Fig 7: X50A Fuse Block - Underhood X4
GM2083844Courtesy of GENERAL MOTORS CORP.
X50A Fuse Block - Underhood X4

Pin Wire Circuit Function
A1-A6 - - Not Used
A7 1 GY 295 Door Lock Actuator Lock Control
A8 1 D-GN 3271 Door Latch Control
B1 - - Not Used
B2 0.8 RD/BK 1042 Battery Positive Voltage
B3 1 RD/WH 2640 Battery Positive Voltage
B4 1 RD/WH 840 Battery Positive Voltage (TB5)
B5 1 D-GN 95 Windshield Wiper Motor Low Speed
C1-C8 - - Not Used
D1 - - Not Used
D2 2 RD/WH 1240 Battery Positive Voltage
D3 1 RD/WH 5140 Battery Positive Voltage (KA1)
D4 0.8 RD/BK 1542 Battery Positive Voltage (F46)
D5 1 PU 92 Windshield Wiper Motor High Speed
E1 5 RD/BK 742 Battery Positive Voltage
E2 - - Not Used
F1 3 RD/BK 442 Battery Positive Voltage
F2 - - Not Used
G1 - - Not Used
G2 2 RD/WH 3540 Battery Positive Voltage (CF5)
G3 1 PK 839 Ignition Voltage
G4-G5 - - Not Used
H1-H6 - - Not Used
H7 0.35 YE 5199 Ignition Voltage
H8 0.5 PK 1739 Ignition Voltage
J1 - - Not Used
J2 0.35 PK 1339 Ignition Voltage (UVC)
J3-J5 - - Not Used
K1-K2 - - Not Used
K3 0.5 TN/WH 1969 Headlamp High Beam Relay Control
K4 0.35 OG 2268 Washer Fluid Pump Relay Control
K5 0.35 TN 28 Horn Relay Control
K6 0.35 L-GN 2270 Rear Window Washer Relay Control
K7 0.35 D-GN/WH 1317 Fog Lamp Relay Control (T96)
K8 0.35 PK 339 Ignition Voltage
X50A Fuse Block - Underhood X5

Terminal Part Information 
  • Harness: Positive Battery Cable
  • Terminal: 13717084
  • Core/Insulation Crimp: N/A
  • Description: Ring Terminal
X50A Fuse Block - Underhood X5

Pin Wire Circuit Function
A 19 RD 1 Battery Positive Voltage
X50A Fuse Block - Underhood X6 (LAF)

Terminal Part Information 
  • Harness: Electric Power Steering
  • Terminal: X30709AC33X8
  • Core/Insulation Crimp: N/A
  • Description: Ring Terminal
X50A Fuse Block - Underhood X6 (LAF)

Pin Wire Circuit Function
A 13 RD/BK 42 Battery Positive Voltage
Connector Part Information 
  • Harness: Body
  • OEM: 15477823
  • Service: 13574911
  • Description: 56-Way F GT 150 280 Metri-Pack Series, (L-GY)
Terminal Part Information 
  • Pins: A7, A8, H7, H8, K3-K8
  • Terminated Lead: Pins H7, H8, K3-K8 - 13575479
  • Terminated Lead: Pins A7, A8 - 13575735
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-2A (GY)
  • Terminal/Tray: 12191812/19
  • Core/Insulation Crimp: Pins H7, H8, K3-K8 - E/C
  • Core/Insulation Crimp: Pins A7, A8 - C/A
  • Pins: B2-B5, D3-D5, G3, J2
  • Terminated Lead: 13575753
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-4A (PU)
  • Terminal/Tray: 15304711/8
  • Core/Insulation Crimp: Pin J2 - E/A
  • Core/Insulation Crimp: Pins B2-B5, D3-D5, G3 - 2/A
  • Pins: D2, G2
  • Terminated Lead: 13575754
  • Release Tool: J-38125-553
  • Diagnostic Test Probe: J-35616-4A (PU)
  • Terminal/Tray: 15304713/19
  • Core/Insulation Crimp: 4/4
  • Pins: E1, F1
  • Terminated Lead: 13575718
  • Release Tool: J-38125-558
  • Diagnostic Test Probe: J-35616-44 (YE)
  • Terminal/Tray: 12110127/19
  • Core/Insulation Crimp: F/G
Fig 8: X51A Fuse Block - Instrument Panel Label (before A6284015)
GM2356378Courtesy of GENERAL MOTORS CORP.
X51A FUSE BLOCK - INSTRUMENT PANEL FUSE AND RELAY IDENTIFICATION LEGEND (BEFORE A6284015)

No. Device Label Name Fuse And Relay Description Rating Circuits
1 STR WHL DM Fuse F1DA Fuse 2A Steering Wheel Control Switch - Left, Steering Wheel Control Switch - Right
2 Not Used Not Used N/A Not Used
3 Not Used Not Used N/A Not Used
4 BCM 1 Fuse F4DA Fuse 15A Body Control Module
5 INFOTMNT Fuse F5DA Fuse 10A Video Display - Driver Seatback (UWG), Video Display - Passenger Seatback (UWG)
6 BCM 2 Fuse F6DA Fuse 15A Body Control Module
7 NCM Fuse F7DA Fuse 5A Active Noise Cancellation Module (VQN)
8 BCM 4 Fuse F8DA Fuse 15A Body Control Module
9 RDO Fuse F9DA Fuse 20A Radio
10 SEO BATT Fuse F10DA Fuse 20A Not Used
11 URPA MDL Fuse F11DA Fuse 10A Object Alarm Control Module (UD7)
12 HVAC BATT Fuse F12DA Fuse 20A HVAC Control Module
13 AUX PWR FRT Fuse F13DA Fuse 20A Accessory Power Receptacle - Instrument Panel
14 HVAC IGN Fuse F14DA Fuse 5A HVAC Control Module
15 DSPLY Fuse F15DA Fuse 10A Info Display Module, Radio/HVAC Control
16 BCM 5 Fuse F16DA Fuse 15A Body Control Module
17 AUX PWR REAR Fuse F17DA Fuse 20A Accessory Power Receptacle - Center Console 1, Accessory Power Receptacle - Center Console 2
18 IPC IGN Fuse F18DA Fuse 5A Instrument Cluster
19 PDI MDL Fuse F19DA Fuse 10A Multimedia Player Interface Module (KTA)
20 BCM 3 Fuse F20DA Fuse 15A Body Control Module
21 SEO RAP Fuse F21DA Fuse 20A Not Used
22 SDM IGN Fuse F22DA Fuse 10A Inflatable Restraint Sensing and Diagnostic Module
23 Not Used Not Used N/A Not Used
24 Not Used Not Used N/A Not Used
25 RPRNDL Fuse F25DA Fuse 10A Transmission Shift Lever Position Indicator
26 Not Used Not Used N/A Not Used
27 Not Used Not Used N/A Not Used
28 Not Used Not Used N/A Not Used
29 BLWR FRT Fuse F29DA Fuse 40A Blower Motor Control Module
30 BCM 6 Fuse F30DA Fuse 15A Body Control Module
31 AMP Fuse F31DA Fuse 30A Audio Amplifier
32 DLIS Fuse F32DA Fuse 5A Ignition Switch
33 CIM Fuse F33DA Fuse 10A Telematics Communication Interface Control Module (UE1)
34 BCM 7 Fuse F34DA Fuse 15A Body Control Module
35 SDM BATT Fuse F35DA Fuse 10A Inflatable Restraint Sensing and Diagnostic Module
36 DLC Fuse F36DA Fuse 7.5A Data Link Connector
37 IPC BATT Fuse F37DA Fuse 10A Instrument Cluster
38 IOS MDL Fuse F38DA Fuse 5A Passenger Presence Detection Sensor
39 Not Used Not Used N/A Not Used
40 BCM 8 Fuse F40DA Fuse 30A Body Control Module
41 LOG RLY KR104A Logistic Mode Relay 1 - Logistic Mode Relay 1 (EXP)
42 RAP RLY KR80 Accessory Relay - Accessory Relay
Fig 9: X51A Fuse Block - Instrument Panel Label (A6284015 And After)
GM2385148Courtesy of GENERAL MOTORS CORP.
X51A FUSE BLOCK - INSTRUMENT PANEL FUSE AND RELAY IDENTIFICATION LEGEND (A6284015 AND AFTER)

No. Device Label Name Fuse And Relay Description Rating Circuits
1 STR WHL DM Fuse F1DA Fuse 2A Steering Wheel Control Switch - Left, Steering Wheel Control Switch - Right
2 Not Used Not Used N/A Not Used
3 Not Used Not Used N/A Not Used
4 BCM 1 Fuse F4DA Fuse 15A Body Control Module
5 INFOTMNT Fuse F5DA Fuse 10A Video Display - Driver Seatback (UWG), Video Display - Passenger Seatback (UWG)
6 BCM 2 Fuse F6DA Fuse 15A Body Control Module
7 NCM Fuse F7DA Fuse 5A Active Noise Cancellation Module (VQN)
8 BCM 4 Fuse F8DA Fuse 15A Body Control Module
9 RDO Fuse F9DA Fuse 20A Radio
10 SEO BATT Fuse F10DA Fuse 20A Not Used
11 URPA MDL Fuse F11DA Fuse 10A Object Alarm Control Module (UD7)
12 HVAC BATT Fuse F12DA Fuse 20A HVAC Control Module
13 AUX PWR FRT Fuse F13DA Fuse 20A Accessory Power Receptacle - Instrument Panel
14 HVAC IGN Fuse F14DA Fuse 5A HVAC Control Module
15 DSPLY Fuse F15DA Fuse 10A Info Display Module, Radio/HVAC Control
16 BCM 5 Fuse F16DA Fuse 15A Body Control Module
17 AUX PWR REAR Fuse F17DA Fuse 20A Accessory Power Receptacle - Center Console 1, Accessory Power Receptacle - Center Console 2
18 IPC IGN Fuse F18DA Fuse 5A Instrument Cluster
19 PDI MDL Fuse F19DA Fuse 10A Multimedia Player Interface Module (KTA)
20 BCM 6 Fuse F20DA Fuse 15A Body Control Module
21 SEO RAP Fuse F21DA Fuse 20A Not Used
22 SDM IGN Fuse F22DA Fuse 10A Inflatable Restraint Sensing and Diagnostic Module
23 Not Used Not Used N/A Not Used
24 Not Used Not Used N/A Not Used
25 RPRNDL Fuse F25DA Fuse 10A Transmission Shift Lever Position Indicator
26 Not Used Not Used N/A Not Used
27 Not Used Not Used N/A Not Used
28 Not Used Not Used N/A Not Used
29 BLWR FRT Fuse F29DA Fuse 40A Blower Motor Control Module
30 BCM 3 Fuse F30DA Fuse 15A Body Control Module
31 AMP Fuse F31DA Fuse 30A Audio Amplifier
32 DLIS Fuse F32DA Fuse 5A Ignition Switch
33 CIM Fuse F33DA Fuse 10A Telematics Communication Interface Control Module (UE1)
34 BCM 7 Fuse F34DA Fuse 15A Body Control Module
35 SDM BATT Fuse F35DA Fuse 10A Inflatable Restraint Sensing and Diagnostic Module
36 DLC Fuse F36DA Fuse 7.5A Data Link Connector
37 IPC BATT Fuse F37DA Fuse 10A Instrument Cluster
38 IOS MDL Fuse F38DA Fuse 5A Passenger Presence Detection Sensor
39 Not Used Not Used N/A Not Used
40 BCM 8 Fuse F40DA Fuse 30A Body Control Module
41 LOG RLY KR104A Logistic Mode Relay 1 - Logistic Mode Relay 1 (EXP)
42 RAP RLY KR80 Accessory Relay - Accessory Relay
Fig 10: X51A Fuse Block - Instrument Panel, Top View
GM2367884Courtesy of GENERAL MOTORS CORP.
Fig 11: X51A Fuse Block - Instrument Panel, Bottom View
GM2367886Courtesy of GENERAL MOTORS CORP.
X51A Fuse Block - Instrument Panel Wire Entry

Connector Part Information 
  • Harness: Instrument Panel
  • OEM: 13712077 (UE1)
  • OEM: 13712078 (without UE1)
  • Service: 20777299 (UE1)
  • Service: 20777300 (without UE1)
  • Description: 48-Way F Fuse Block (BK)
Terminal Part Information 
  • Pins: B1, E5, F5
  • Terminated Lead: Pending
  • Release Tool: 12150860
  • Diagnostic Test Probe: J-35616-44 (YE)
  • Terminal/Tray: 12110127/19
  • Core/Insulation Crimp: F/G
  • Pins: F3
  • Terminated Lead: Pending
  • Release Tool: 15315247
  • Diagnostic Test Probe: J-35616-4A (PU)
  • Terminal/Tray: 12110842/4
  • Core/Insulation Crimp: A/B
  • Pins: A4-A9, C1-C3, C5, D1-D6, E2-E4, E6-E9, F2, F4, F6-F11, G1, H1
  • Terminated Lead: 13575721
  • Release Tool: 15315247
  • Diagnostic Test Probe: J-35616-4A (PU)
  • Terminal/Tray: 12110844/4
  • Core/Insulation Crimp: Pins A5, A7, C1-C3, D2, D6, F4, F9-F11, H1 - E/4
  • Core/Insulation Crimp: Pins A8, A9, D1, E3, E9, F6, F8, G1 - E/A
  • Core/Insulation Crimp: Pins A4, A6, C5, D3-D5, E2, E4, E6-E8, F2, F7 - C/A
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: A1-A3
  • Terminated Lead: 13575713
  • Release Tool: 12094430
  • Diagnostic Test Probe: J-35616-40 (BU)
  • Terminal/Tray: 12065892/18
  • Core/Insulation Crimp: A/F
  • Pins: E1, F1
  • Terminated Lead: Pending
  • Release Tool: 15315247
  • Diagnostic Test Probe: J-35616-43 (RD)
  • Terminal/Tray: 15410292/23
  • Core/Insulation Crimp: Pins E1 - G/F/G/F
  • Core/Insulation Crimp: Pins F1 - G/F/G
X51A Fuse Block - Instrument Panel (Wire Entry)

Pin Wire Circuit Function
A1 0.35 YE/BK 9231 Logisitics Relay Control (EXP)
A2 0.35 BK 1550 Ground
A3 0.35 YE 7546 Logisitics Relay Control (EXP)
A4 0.35 RD/WH 4240 Battery Positive Voltage (UWG)
0.35 RD/WH 4240 Battery Positive Voltage (UWG)
A5 0.35 RD/WH 4340 Battery Positive Voltage (VQN)
A6 0.8 RD/WH 340 Battery Positive Voltage
A7 0.35 RD/WH 3140 Battery Positive Voltage (UD7)
A8 0.5 RD/WH 3240 Battery Positive Voltage
A9 0.5 RD/WH 4140 Battery Positive Voltage (KTA)
A10 - - Not Used
B1 5 RD/BK 742 Battery Positive Voltage
C1 0.35 PK 539 Ignition Voltage
C2 0.35 PK 139 Ignition 1 Voltage
C3 0.35 PK 1139 Ignition Voltage
C4 - - Not Used
C5 1 PK 839 Ignition Voltage
C6 - - Not Used
D1 0.5 BK 1550 Ground
D2 0.35 PK 70 RAP Relay Switch Supply Voltage
D3 1 D-GN 801 RAP 2 Fuse Supply Voltage
D4 1 D-GN 1001 RAP 1 Fuse Supply Voltage
D5 1 D-GN 1301 RAP Fuse Supply Voltage (UZ8)
D6 0.35 RD/BK 1002 RAP 1 Fuse Supply Voltage
D7 - - Not Used
E1 3 RD/WH 4040 Battery Positive Voltage
E2 0.8 RD/WH 2140 Battery Positive Voltage
E3 0.5 RD/WH 3840 Battery Positive Voltage
E4 1 RD/WH 2540 Battery Positive Voltage
E5 5 RD/BK 42 Battery Positive Voltage
E6 1 RD/WH 4640 Battery Positive Voltage (UZ8)
E7 0.8 RD/WH 3340 Battery Positive Voltage
E8 0.8 RD/WH 2940 Battery Positive Voltage
E9 0.5 RD/WH 3440 Battery Positive Voltage
E10 - - Not Used
F1 5 RD/BK 542 Battery Positive Voltage
F2 0.8 RD/WH 2740 Battery Positive Voltage
F3 2 RD/WH 3740 Battery Positive Voltage (UZ8)
F4 0.35 RD/WH 540 Battery Positive Voltage
F5 5 RD/BK 1642 Battery Positive Voltage
F6 0.5 RD/WH 5340 Ground (UE1)
F7 0.8 RD/WH 2240 Battery Positive Voltage
F8 0.5 RD/WH 4440 Battery Positive Voltage
F9 0.35 RD/WH 40 Battery Positive Voltage
F10 0.35 RD/WH 2840 Battery Positive Voltage
F11 0.35 RD/WH 2040 Battery Positive Voltage (without APL)
F12 - - Not Used
G1 0.5 YE 6817 LED Backlight Dimming Control
G2-G3 - - Not Used
H1 0.35 YE 6817 LED Backlight Dimming Control
H2-H3 - - Not Used
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