In this article, you will find information about the fuses of the Cadillac CT6 (models 2019 and 2020), including diagrams of the fuse boxes, a list of fuses and relays, their designation, and the location of the fuse blocks within the vehicle.
Checking and Replacing Fuses in Cadillac CT6 The vehicle has fuses and circuit breakers to protect against an electrical system overload. When the current electrical load is too heavy, the circuit breaker opens and closes, protecting the circuit until the current load returns to normal or the problem is fixed. This greatly reduces the chance of circuit overload and fire caused by electrical problems. Fuses and circuit breakers protect power devices in the vehicle. To check a fuse, look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse Replace a bad fuse with a new one of the identical size and rating.
Caution!
Fuses and circuit breakers are marked with their ampere rating. Do not exceed the specified amperage rating when replacing fuses and circuit breakers.
Location of Fuse BoxesEngine Compartment Fuse Block (2.0L, 3.0L and 3.6L): This fuse block is on the driver side of the engine compartment. Lift the fuse block cover to access the fuses.
Engine Compartment Fuse Block (4.2L): The 4.2L engine has an underhood fuse block on each side of the engine compartment. Lift the fuse block cover to access the fuses.
Instrument Panel Fuse Block: The instrument panel fuse block is behind the driver side instrument panel storage compartment. The storage compartment has a press to open latch. To access the fuses, open the compartment by pressing and releasing near the top center square. Apply pressure to the two retaining tabs on the sides of the compartment, until the two retaining tabs clear the sides of the instrument panel. Allow the compartment to move downward, and out of the way.
Rear Compartment Fuse Block: The rear compartment fuse block is behind a cover on the passenger side.
An electrical overload may cause the lamps to go on and off, or in some cases to remain off. Have the headlamp wiring checked right away if the lamps go on and off or remain off. If the wiper motor overheats due to heavy snow or ice, the windshield wipers will stop. Although the circuit is protected from electrical overload, overload due to heavy snow or ice may cause wiper linkage damage. Fuse Box Diagrams 2019Engine Compartment Fuse Block (2.0L, 3.0L and 3.6L)
List of fuses in the Engine Compartment Fuse Block (2019) № Usage 1 - 2 - 3 - 4 - 5 Transfer case control / Transmission control module ignition 6 - 7 Starter motor 8 Starter pinion 9 Horn 10 - 11 - 12 - 13 High-beam headlamps left/right 18 Right cornering LED 21 Air conditioning clutch 22 Transmission auxiliary oil pump cooling 23 - 24 Cabin heater pump 26 Engine control module ignition 27 Steering column lock ignition 28 Rear heated seats ignition 29 Front heated seats ignition 30 - 31 Headlamp / Daytime running lamps / Right headlamp 32 - 33 - 34 - 35 Engine control module ignition - 2 36 Engine control module ignition - 1 37 Coolant pump / Ignition coils - odd 38 Ignition coils - even / Non walk 2 39 Non walk 40 Electric brake control module 1 / Instrument cluster / central gateway module ignition 41 - 42 Fuel tank zone module / Ignition 43 Heated steering wheel module / Reflective light aux display / HVAC IGN / Automatic occupant sensing display 44 Aeroshutter 45 Washer 46 Front short range radar sensors 47 Left cornering LED 54 - 55 - 56 - 57 - 58 - 59 - 60 Antilock brake system pump/Electric brake control module - 1 61 Front wiper 62 Headlamp leveling 63 - 64 - 66 Transfer case control module 67 - 68 - 69 - 70 - 71 Antilock brake system valve 72 - 73 - Relays 14 Air conditioning control 15 Starter motor 16 Starter pinion 17 Run/Crank 19 - 20 High-beam headlamp 25 Cabin heater pump 48 - 49 - 50 Engine control module 51 Wiper speed 52 Wiper control 53 Headlamp control 65 -
Engine Compartment Fuse Block (4.2L)
List of fuses in the Engine Compartment Fuse Block №1 (2019) № Usage F1 - F2 - F4 - F4 - F5 High-beam headlamps left/right F6 - F7 Front wiper F8 - F9 Instrument cluster / Electric brake control module 1 / Central gateway module ignition F10 - F11 Transmission control / Transfer case control module ignition F12 - F13 Front heated seats ignition F14 Exhaust valve solenoid F15 Rear heated seats ignition F16 Fuel tank zone module ignition F17 - F18 - F19 - F20 - F21 Heated steering wheel module / Reflective light aux display / HVAC IGN / Automatic occupant sensing display F22 Electric steering column lock ignition F23 Washer F24 Left cornering LED F25 - F26 - F27 - F28 - F29 Electric brake control module - 1 Relays R1 - R2 - R3 - R4 High-beam headlamp R5 Wiper control R6 Wiper speed R7 Run/Crank R8 -
List of fuses in the Engine Compartment Fuse Block №2 (2019) № Usage F1 Electric brake control module - 2 F2 - F3 Headlamp / Daytime running lamps F4 Right cornering LED F5 - F6 Front short range radar sensors F7 Horn F8 Air conditioning clutch F9 - F10 - F11 Automatic headlamp leveling F12 Starter motor F13 Starter pinion F14 - F15 - F16 - F17 Cabin heater pump F18 Transmission auxiliary oil pump cooling F19 Engine control module ignition F20 Non walk F21 Ignition coils - even / Non walk - 2 F22 Engine control module ignition - 1 F23 Transfer case control module F24 - F25 Ignition coils - odd F26 Charge air coolant pump F27 Engine control module ignition - 2 F28 - F29 - Relays R1 Headlamp / Daytime running lamps R2 Air conditioning control R3 Starter motor R4 Starter pinion R5 Cabin heater pump R6 Engine control module R7 - R8 -
Instrument Panel Fuse Block
List of fuses in the Instrument Panel Fuse Block (2019) № Usage F1 Auxiliary power outlet front console F2 Visor F3 Front blower F4 Body control module 8 F5 Power steering column F6 Electric steering column lock F7 Glove box door F8 Front heated seat module F9 Sensing and diagnostic module F10 Body control module 4 F11 Body control module 3 F12 Data link connector F13 - F14 Electronic shifter F15 Front camera F16 Display F17 Heating, ventilation, and air conditioning control F18 OnStar F19 - F20 - F21 Traction power inverter 2 F22 - F23 Central gateway module F24 Center stack module / Infotainment F25 Video processing module night vision F26 Steering wheel controls F27 USB charge port F28 Wireless charger F29 - F30 Speaker
Rear Compartment Fuse Block
List of fuses in the Rear Compartment Fuse Block (With Super Cruise) (2019). № Usage F01 - F02 Body control module 2 and 4 F03 Left rear external object calculating module F04 Steering wheel display / Touch sensor F05 - F06 - F07 Left front and right rear short range radar sensor / Camera image processing module F08 Driver memory seat module F09 Column friction device F10 Left headlamp FI 1 - F12 - F13 Left front subwoofer F14 Rear blower F15 Left window F16 Canister vent F17 Rear seat memory / Heated F18 Rear subwoofer F19 Damping control module F20 - F21 Electric brake control module - 2 F22 - F23 Left front motorized seat belt pretensioner F24 Body control module 7 F25 Passive entry / Passive start battery F26 Rear closure latch F27 Amplifier F28 Rear defogger F29 Park assist module F30 Body control module 1 F31 Driver monitoring system F32 Driver passenger door window / Mirror / Driver seat adjustment / Fuel door switch F33 Passenger / Rear seat adjustment switch F34 Left front memory seat F35 Right rear memory seat F36 External heated mirror F37 - F38 Transmission control module F39 Rear seat infotainment module F40 - F41 - F42 - F43 Power trunk module F44 Right front memory seat F45 - F46 Right window F47 Engine control module battery F48 Right front subwoofer F49 Body control module 6 F50 - F51 - F52 Fuel pump power module / Fuel tank zone module F53 Rear seat auxiliary power outlet F54 Left rear memory seat F55 - F56 Rear closure release switch / Power trunk module F57 Rear left and rear center short range radar sensors / Long range radar sensors / Right rear external object calculating module F58 Auxiliary audio/Video F59 - F60 Memory bolster module F61 - F62 Ventilated seat F63 Universal garage door opener / Power sounder module / Rain sensor F64 Passenger memory seat module F65 Right front short range radar sensor / Advance driver assist map F66 Television tuner module F67 - F68 - F69 - F70 Right front motorized seat belt pretensioner F71 Rear heated seat module F72 Sunroof F73 Rear vision camera / Rearview mirror / Air quality sensor F74 Rear window sunshade F75 Engine control module ignition F76 Misc run crank / Energy storage control module / DC DC converter / Rear external object calculating module F77 Trunk auxiliary power outlet F78 Rear HVAC display F79 - F80 - F81 - F82 - F83 - F84 - F85 - F86 - F87 - Relays R01 Rear seat auxiliary power outlet R02 Spare R03 Run/Crank
List of fuses in the Rear Compartment Fuse Block (Without Super Cruise) (2019) № Usage F01 - F02 Auxiliary trunk power outlet F03 Left window F04 - F05 Canister vent F06 Right rear memory seat F07 Body control module 7 F08 Passenger / Rear seat adjustment switch F09 Passive entry / Passive start battery F10 Rear subwoofer F11 Left front memory seat module F12 - F13 - F14 Rear seat memory / Heated F15 Left front subwoofer F16 Right front memory seat F17 Rear heated seat F18 Regulated voltage control battery F19 Driver passenger door window / Mirror / Driver seat adjustment / Fuel door switch F20 Electric brake control module - 2 F21 Vehicle integration control module F22 - F23 Rear closure latch F24 - F25 Left front motorized seat belt pretensioner F26 Rear defogger F27 Right front subwoofer F28 Amplifier F29 Sunroof F30 Body control module 2 F31 Body control module 6 F32 Exterior heated mirrors F33 Right window F34 Power trunk module F35 On-board charging module F36 Pedestrian friendly alert function F37 - F38 Rear blower F39 Fuel pump power module / Fuel tank zone module F40 - F41 Rear seat auxiliary power outlet F42 Left rear memory seat F43 - F44 Rear closure release switch / Power trunk module / Integrated chassis control module battery F45 Auxiliary audio/Video F46 External object calculating module / Side blind zone alert / Rear center short range radar sensor / Long range radar sensors F47 - F48 - F49 Memory bolster module F50 Body control module 1 F51 Transmission control module F52 Park assist F53 Ventilated seats F54 Universal garage door opener / Power sounder module / Rain sensor F55 Front memory seat module F56 Evaporative emissions leak check module / Rear HVAC display F57 Voltage current temperature module F58 - F59 Engine control module battery F60 Right front motorized seat belt pretensioner F61 - F62 - F63 Rear seat infotainment module F64 Engine control module ignition F65 Rear window sunshade F66 Rear vision camera / Rearview mirror F67 Run/Crank misc / Air quality sensor / Integrated chassis control module / Electronic shifter / DC DC converter F68 Damping control module F69 Television tuner module F70 - F71 - F72 - F73 - F74 - F75 - Relays R1 Rear seat auxiliary power outlet R2 Spare R3 Run/Crank
2020Engine Compartment Fuse Block (2.0L, 3.0L and 3.6L)
List of fuses in the Engine Compartment Fuse Block (2020) № Usage 1 - 2 - 3 - 4 - 5 Transfer case control / Transmission control module ignition 6 - 7 Starter motor 8 Starter pinion 9 Horn 10 - 11 - 12 - 13 High-beam headlamps left/right 18 Right cornering LED 21 Air conditioning clutch 22 Transmission auxiliary oil pump cooling 23 - 24 Cabin heater pump 26 Engine control module ignition 27 Steering column lock ignition 28 Rear heated seats ignition 29 Front heated seats ignition 30 - 31 Headlamp/Daytime running lamps / Right headlamp 32 - 33 - 34 - 35 Engine control module ignition - 2 36 Engine control module ignition - 1 37 Coolant pump/ Ignition coils - odd 38 Ignition coils - even/ Non walk 2 39 Non walk 40 Electric brake control module 1 / Instrument cluster / central gateway module ignition 41 - 42 Fuel tank zone module /Ignition 43 Heated steering wheel module / Reflective light aux display / HVAC IGN / Automatic occupant sensing display 44 Aeroshutter 45 Washer 46 Front short range radar sensors 47 Left cornering LED 54 - 55 - 56 - 57 - 58 - 59 - 60 Antilock brake system pump / Electric brake control module - 1 61 Front wiper 62 Headlamp leveling 63 - 64 - 66 Transfer case control module 67 - 68 - 69 - 70 - 71 Antilock brake system valve 72 - 73 - Relays 14 Air conditioning control 15 Starter motor 16 Starter pinion 17 Run/Crank 19 - 20 High-beam headlamp 25 Cabin heater pump 48 - 49 - 50 Engine control module 51 Wiper speed 52 Wiper control 53 Headlamp control 65 -
Engine Compartment Fuse Block (4.2L)
List of fuses in the Engine Compartment Fuse Block №1 (2020) № Usage F1 - F2 - F3 - F4 - F5 High-beam headlamps left/right F6 - F7 Front wiper F8 - F9 Instrument cluster / Electric brake control module 1 / Central gateway module ignition F10 - F11 Transmission control / Transfer case control module ignition F12 - F13 Front heated seats ignition F14 Exhaust valve solenoid F15 Rear heated seats ignition F16 Fuel tank zone module ignition F17 - F18 - F19 - F20 - F21 Heated steering wheel module / Reflective light aux display / HVAC IGN / Automatic occupant sensing display F22 Electric steering column lock ignition F23 Washer F24 Left cornering LED F25 - F26 - F27 - F28 - F29 Electric brake control module - 1 Relays R1 - R2 - R3 - R4 High-beam headlamp R5 Wiper control R6 Wiper speed R7 Run/Crank R8 -
List of fuses in the Engine Compartment Fuse Block №2 (2020) № Usage F1 Electric brake control module - 2 F2 - F3 Headlamp / Daytime running lamps F4 Right cornering LED F5 - F6 Front short range radar sensors F7 Horn F8 Air conditioning clutch F9 - F10 - F11 Automatic headlamp leveling F12 Starter motor F13 Starter pinion F14 - F15 - F16 - F17 Cabin heater pump F18 Transmission auxiliary oil pump cooling F19 Engine control module ignition F20 Non walk F21 Ignition coils - even / Non walk - 2 F22 Engine control module ignition - 1 F23 Transfer case control module F24 - F25 Ignition coils - odd F26 Charge air coolant pump F27 Engine control module ignition - 2 F28 - F29 - Relays R1 Headlamp / Daytime running lamps R2 Air conditioning control R3 Starter motor R4 Starter pinion R5 Cabin heater pump R6 Engine control module R7 - R8 -
Instrument Panel Fuse Block
List of fuses in the Instrument Panel Fuse Block (2020) № Usage F1 Auxiliary power outlet front console F2 Visor F3 Front blower F4 Body control module 8 F5 Steering column switch module F6 Electric steering column lock F7 Glove box door F8 Front heated seat module F9 Sensing and diagnostic module F10 Body control module 4 F11 Body control module 3 F12 Data link connector F13 - F14 Electronic shifter F15 Front camera F16 Display F17 Heating, ventilation, and air conditioning control F18 OnStar F19 - F20 - F21 - F22 - F23 Central gateway module F24 Center stack module / Infotainment F25 Video processing module night vision F26 Steering wheel controls F27 USB charge port F28 Wireless charger F29 - F30 Speaker
Rear Compartment Fuse Block
List of fuses in the Rear Compartment Fuse Block (With Super Cruise) (2020) № Usage F01 - F02 Body control module 2 and 4 F03 Left rear external object calculating module F04 Steering wheel display / Touch sensor F05 - F06 - F07 Left front and right rear short range radar sensor / Camera image processing module F08 Driver memory seat module F09 Column friction device F10 Left headlamp F11 - F12 - F13 Left front subwoofer F14 Rear blower F15 Left window F16 Canister vent F17 Rear seat memory / Heated F18 Rear subwoofer F19 Damping control module F20 - F21 Electric brake control module - 2 F22 - F23 Left front motorized seat belt pretensioner F24 Body control module 7 F25 Passive entry / Passive start battery F26 Rear closure latch F27 Amplifier F28 Rear Defogger F29 Park assist module F30 Body control module 1 F31 Driver monitoring system F32 Driver passenger door window / Mirror / Driver seat adjustment / Fuel door switch F33 Passenger / Rear seat adjustment switch F34 Left front memory seat F35 Right rear memory seat F36 External heated mirror F37 - F38 Transmission control module F39 Rear seat infotainment module F40 - F41 - F42 - F43 Power trunk module F44 Right front memory seat F45 - F46 Right window F47 Engine control module battery F48 Right front subwoofer F49 Body control module 6 F50 - F51 - F52 Fuel tank zone module F53 Rear seat auxiliary power outlet F54 Left rear memory seat F55 - F56 Rear closure release switch / Power trunk module F57 Rear left and rear center short range radar sensors / Long range radar sensors / Right rear external object calculating module F58 Auxiliary audio/Video F59 - F60 Memory bolster module F61 - F62 Ventilated seat F63 Universal garage door opener / Power sounder module / Rain sensor F64 Passenger memory seat module F65 Right front short range radar sensor / Advance driver assist map F66 Television tuner module F67 - F68 - F69 - F70 Right front motorized seat belt pretensioner F71 Rear heated seat module F72 Sunroof F73 Rear vision camera / Inside Rearview mirror / Air quality sensor F74 Rear window sunshade F75 Engine control module ignition F76 Misc run crank / Energy storage control module / DC DC converter / Rear external object calculating module / Shifter interface board module F77 Trunk auxiliary power outlet F78 Rear HVAC display F79 - F80 - F81 - F82 - F83 - F84 - F85 - F86 - F87 - Relays R01 Rear seat auxiliary power outlet R02 Spare R03 Run/Crank
List of fuses in the Rear Compartment Fuse Block (Without Super Cruise) (2020) № Usage F01 - F02 Auxiliary trunk power outlet F03 Left window F04 - F05 Canister vent F06 Right rear memory seat F07 Body control module 7 F08 Passenger / Rear seat adjustment switch F09 Passive entry / Passive start battery F10 Rear subwoofer FI 1 Left front memory seat module F12 - F13 - F14 Rear seat memory / Heated F15 Left front subwoofer F16 Right front memory seat F17 Rear heated seat F18 - F19 Driver passenger door window / Mirror / Driver seat adjustment / Fuel door switch F20 Electric brake control module - 2 F21 - F22 - F23 Rear closure latch F24 - F25 Left front motorized seat belt pretensioner F26 Rear Defogger F27 Right front subwoofer F28 Amplifier F29 Sunroof F30 Body control module 2 F31 Body control module 6 F32 Exterior heated mirrors F33 Right window F34 Power trunk module F35 - F36 - F37 - F38 Rear blower F39 Fuel tank zone module F40 - F41 Rear seat auxiliary power outlet F42 Left rear memory seat F43 - F44 Rear closure release switch / Power trunk module / Integrated chassis control module battery F45 Auxiliary audio/Video F46 External object calculating module / Side blind zone alert / Rear center short range radar sensor / Long range radar sensors F47 - F48 - F49 Memory bolster module F50 Body control module 1 F51 Transmission control module F52 Park assist F53 Ventilated seats F54 Headliner / Universal garage door opener / Power sounder module / Rain sensor F55 Front memory seat module F56 Rear HVAC Display F57 - F58 - F59 Engine control module battery F60 Right front motorized seat belt pretensioner F61 - F62 - F63 Rear seat infotainment module F64 Engine control module ignition F65 Rear window sunshade F66 Rear vision camera/ Inside Rearview mirror F67 Run/Crank misc / Air quality sensor / Integrated chassis control module / Electronic shifter / DC DC converter F68 Damping control module F69 Television tuner module F70 - F71 - F72 - F73 - F74 - F75 - Relays R1 Rear seat auxiliary power outlet R2 Spare R3 Run/Crank