Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 74 (COMPONENT LOCATIONS - ELECTRICAL CENTER IDENTIFICATION VIEWS)ELECTRICAL CENTER IDENTIFICATION VIEWSX50A FUSE BLOCK - UNDERHOOD, TOP VIEW (LUV)
2019 Chevrolet Tahoe LS, 4WD, Gas/Ethanol
X50A Fuse Block - Underhood, Top View (LUV)
2019 Chevrolet Tahoe LS, 4WD, Gas/EthanolSECTION X50A Fuse Block - Underhood, Top View (LUV)
WARNING: This page is about a different car, the 2018 Chevrolet Sonic. However, it is still accessible from the selected car via links, so may be relevant.
Usage Table
| No. | Device Label Name | Device Assigned Name | Rating | Description |
|---|---|---|---|---|
| Mini Fuses | ||||
| 01 | ABS VALVE | F1UA | 30A |
|
| 02 | SUNROOF | F2UA | 20A |
|
| 03 | NOT USED | - | - |
|
| 04 | NOT USED | - | - |
|
| 05 | OSRVM/POWER WINDOW SWITCH | F5UA | 7.5A |
|
| 06 | AOS/ROS | F6UA | 5A |
|
| 07 | PASSIVE ENTRY/PASSIVE START | F7UA | 7.5A |
|
| 08 | RVC | F8UA | 5A |
|
| 09 | REAR WIPER | F9UA | 20A |
|
| 10 | NOT USED/ IBS | F10UA | 5A |
|
| 11 | RR WDW DEFOG | F11UA | 30A |
|
| 12 | ESCL | F12UA | 10A |
|
| 13 | NOT USED/ SAI VALVE | F13UA | 10A |
|
| 14 | OSRVM HTD | F14UA | 7.5A |
|
| 15 | HEATED SEAT FRONT | F15UA | 25 A |
|
| 16 | FSCM_1 | F16UA | 20A |
|
| 17 | CANISTER VENT | F17UA | 10A |
|
| 18 | WASHER | F18UA | 10A |
|
| 19 | NOT USED | - | - |
|
| 20 | ECM_5 | F20UA | 10A |
|
| 21 | FSCM_2/LEVELING | F21UA | 10A |
|
| 22 | TCM_1/DC-DC CONVERTER | F22UA | 10A |
|
| 23 | NOT USED | - | - |
|
| 24 | ECM_1 | F24UA | 10A |
|
| 25 | COIL/ECM | F25UA | 10A |
|
| 26 | ECM_4 | F26UA | 10A |
|
| 27 | ECM_3 | F27UA | 10A |
|
| 28 | ECM_2 | F28UA | 20A |
|
| 29 | INJECTOR/IGNITION COIL | F29UA | 15A |
|
| 30 | ECM | F30UA | 15A |
|
| 31 | AC CLUTCH | F31UA | 10A |
|
| 32 | TCM | F32UA | 15A |
|
| 33 | HORN | F33UA | 15A |
|
| 34 | FRT FOG | F34UA | 10A |
|
| 35 | HIGH BEAM LH | F35UA | 10A |
|
| 36 | HIGH BEAM RH | F36UA | 10A |
|
| J-Case Fuses | ||||
| 01 | FRT WIPER | F1UB | 30A |
|
| 02 | ABS PUMP | F2UB | 40A |
|
| 03 | BLOWER | F3UB | 40A |
|
| 04 | RUN/CRANK IEC | F4UB | 30A |
|
| 05 | POWER SEAT | F5UB | 30A |
|
| 06 | COOL FAN K4 | F6UB | 30A |
|
| 07 | COOL FAN K5 | F7UB | 40A |
|
| 08 | SAI PUMP | F8UB | 40A |
|
| 09 | EVP | F9UB | 20A |
|
| 10 | START | F10UB | 25A |
|
| Micro Relays | ||||
| 01 | FRT WIPER CONT | KR12B Windshield Wiper Relay | - |
|
| 03 | FRT WIPER SPEED | KR12C Windshield Wiper Speed Control Relay | - |
|
| HC-Micro Relays | ||||
| 12 | START | KR27 Starter Relay | - |
|
| U-Micro Relays | ||||
| 02 | NOT USED/ REAR FOG LAMP | KR57 Rear Fog Lamp Relay | - |
|
| 06 | NOT USED/ SAI VALVE | KR26 Secondary Air Injection Solenoid Valve Relay | - |
|
| 13 | AC CLUTCH | KR29 A/C Compressor Clutch Relay | - |
|
| 14 | HIGH BEAM | KR48 Headlamp High Beam Relay | - |
|
| MINI Relays | ||||
| 04 | RR DEFOG | KR5 Rear Defogger Relay | - |
|
| 05 | RUN/CRANK | KR73 Ignition Main Relay | - |
|
| 09 | COOL FAN K2 | KR20D Cooling Fan Medium Speed Relay | - |
|
| 10 | COOL FAN K3 | KR20D Cooling Fan High Speed Relay | - |
|
| 11 | P/T | KR75 Engine Controls Ignition Relay | - |
|
| 15 | COOL FAN K1 | KR20C Cooling Fan Low Speed Relay | - |
|
| Note: Relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the block. | ||||
| - | - | KR3 Horn Relay | - |
|
| - | - | KR6 Rear Window Washer Pump Relay | - |
|
| - | - | KR7 Rear Wiper Relay | - |
|
| - | - | KR11 Windshield Washer Pump Relay | - |
|
| - | - | KR46 Front Fog Lamp Relay | - |
|
| - | - | KR97 Door Lock Relay | - |
|
| Note: Items listed below are diagnostic test points for PCB relays | ||||
| TP01 | - | TP01 | - |
|
| TP02 | - | TP02 | - |
|
| TP03 | - | TP03 | - |
|
| TP04 | - | TP04 | - |
|
| TP05 | - | TP05 | - |
|
| TP06 | - | TP06 | - |
|
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.