Engine Coolant
50/50 mixture of clean, drinkable water and use only DEX-COOL Coolant. See Cooling System 0 246.
Applies to: Engine Coolant
Owner’s manual specs
2020 Cadillac CT4 Specs: Oil Capacity, Fluids, Maintenance Schedule & Fuse Box
Figures for the 2020 Cadillac CT4, copied from Cadillac’s own owner’s manual. Every one links to the manual page it came from.
From the manufacturer’s manuals. Every figure here is copied from the manufacturer's own manual, with a link to the page it came from. Where a manual is unclear or contradicts itself, we leave the figure out.
Engines in this manual: 2.0L L4, 2.7L L4. Figures that differ by engine say which engine they are for.
Fluids & capacities
All engines
Engine Oil
Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1 full synthetic is recommended. See Engine Oil 0 241.
Applies to: Engine Oil
2.0L L4
Engine Cooling System*
11 qt
10.4 L
Applies to: 2.0L L4 engine
Engine Oil with Filter
5.3 qt
5 L
Applies to: 2.0L L4 engine · with filter
2.7L L4
Engine Cooling System*
13.7 qt
13 L
Applies to: 2.7L L4 engine
Engine Oil with Filter
6 qt
5.7 L
Applies to: 2.7L L4 engine · with filter
Maintenance schedule
Normal service schedule
Use this for ordinary driving.
| Service | When |
|---|---|
| Replace engine air cleaner filter. (4) | Every 45,000 mi(72,000 km) |
| Replace passenger compartment air filter. (2) | Every 22,500 mi(36,000 km) |
Severe service schedule
Use this if you tow, idle a lot, drive short trips in the cold, or run in dust.
| Service | When |
|---|---|
| Change automatic transmission fluid and filter. | Every 45,000 mi(72,000 km) |
| Replace engine air cleaner filter. (4) | Every 45,000 mi(72,000 km) |
| Replace passenger compartment air filter. (2) | Every 22,500 mi(36,000 km) |
Oil life & reset procedures
Engine oil life system reset
Before you start
- Reset the system whenever the engine oil is changed so that the system can calculate the next engine oil change.
Steps
- Using the DIC buttons, display REMAINING OIL LIFE on the DIC. See Driver Information Center (DIC) 0 109.
- Press and hold the thumbwheel to clear the CHANGE ENGINE OIL SOON message and reset the oil life at 100%.
- Pull out the air cleaner/filter.
- Inspect or replace the air cleaner/filter.
- Reverse Steps 1-3 to reinstall the air cleaner/filter cover.
You’ll know it worked: If the CHANGE ENGINE OIL SOON message is not on, the system is reset.
Use of the incorrect automatic transmission fluid may damage the vehicle, and the damage may not be covered by the vehicle warranty.
(Continued) transmission fluid.
Fuse box locations & fuse chart
Engine Compartment Fuse Block
Where to find it
Engine Compartment Fuse Block The engine compartment fuse block is on the passenger side of the engine compartment.
What each fuse protects
| Fuse | Amps | Protects | Source |
|---|---|---|---|
| 1 | — | Long range radar front sensor | p.261 |
| 2 | — | Park/Daytime running lamps | p.261 |
| 3 | — | Exterior lighting module 4 | p.261 |
| 5 | — | Headlamp level | p.261 |
| 7 | — | Electronic brake control module | p.261 |
| 8 | — | Washer pump | p.261 |
| 12 | — | Horn | p.262 |
| 13 | — | Front wiper | p.262 |
| 14 | — | Exterior lighting module 6 | p.262 |
| 15 | — | Exterior lighting module 1 | p.262 |
| 16 | — | Exterior lighting module 5 | p.262 |
| 17 | — | Exterior lighting module 3 | p.262 |
| 18 | — | Aero shutter | p.262 |
| 21 | — | Virtual key system/ Power sounder module | p.262 |
| 23 | — | Transmission control module | p.262 |
| 24 | — | Active engine mount | p.262 |
| 26 | — | Engine control module | p.262 |
| 27 | — | Injectors/Ignition 2 | p.262 |
| 28 | — | Charged air cooler | p.262 |
| 29 | — | Transmission coolant pump | p.262 |
| 30 | — | Injectors/Ignition 1 | p.262 |
| 31 | — | Emissions 1 | p.262 |
| 32 | — | Emissions 2 | p.262 |
| 33 | — | Starter solenoid | p.262 |
| 35 | — | Coolant pump | p.262 |
| 36 | — | Starter pinion | p.262 |
| 37 | — | AC clutch | p.262 |
| 42 | — | Water pump | p.262 |
| 48 | — | Front wiper speed | p.262 |
| 49 | — | Front wiper control | p.262 |
| 52 | — | Engine control module | p.262 |
| 53 | — | Starter solenoid | p.262 |
| 54 | — | Starter pinion | p.262 |
| 57 | — | AC clutch | p.262 |
Instrument Panel Fuse Block
Where to find it
Instrument Panel Fuse Block The instrument panel fuse block is in the end of the driver side of the instrument panel.
What each fuse protects
| Fuse | Amps | Protects | Source |
|---|---|---|---|
| 1 | — | Run after park/ Accessory | p.265 |
| 5 | — | Theft deterrent/ Universal garage door opener | p.264 |
| 7 | — | Air quality ionizer | p.264 |
| 8 | — | Heated steering wheel | p.264 |
| 10 | — | Electronic steering column lock 1 | p.264 |
| 19 | — | Airbag/Automatic occupant sensing/ Data link connection/ Wireless charging module | p.264 |
| 20 | — | Power steering column module/ Electronic steering column lock 2 | p.264 |
| 25 | — | USB | p.264 |
| 31 | — | Headlamp level | p.264 |
| 33 | — | Body ignition/IP ignition | p.264 |
| 34 | — | Exhaust valve | p.264 |
| 35 | — | Transmission control module ignition/ Engine control module ignition/Shift ignition/Brake ignition | p.264 |
| 36 | — | Shift module | p.264 |
| 37 | — | Body control module 1/Electronic park brake switch | p.264 |
| 38 | — | Center stack module | p.264 |
| 39 | — | Steering wheel controls | p.264 |
| 40 | — | Body control module 2 | p.264 |
| 41 | — | Body control module 3 | p.264 |
| 42 | — | Body control module 4 | p.264 |
Rear Compartment Fuse Block
Where to find it
Rear Compartment Fuse Block The rear compartment fuse block is behind a cover on the driver side of the rear compartment.
Diagrams in the manual
What each fuse protects
| Fuse | Amps | Protects | Source |
|---|---|---|---|
| 2 | — | Engine control module | p.266 |
| 3 | — | Driver heated seat | p.266 |
| 4 | — | Fuel tank zone module | p.266 |
| 10 | — | Motor seat belt passenger | p.266 |
| 11 | — | Canister vent solenoid | p.266 |
| 12 | — | Sunroof | p.266 |
| 15 | — | Passenger heated seat | p.266 |
| 19 | — | Motor seat belt driver | p.266 |
| 20 | — | Rear defog | p.266 |
| 21 | — | DC to DC transformer 2 | p.266 |
| 22 | — | Driver power window door lock switch | p.266 |
| 23 | — | External object calculating module/ Front camera module | p.266 |
| 24 | — | Passenger window door lock switch | p.266 |
| 26 | — | Trailer | p.266 |
| 27 | — | Rear drive control module | p.266 |
| 31 | — | DC to DC transformer 1 | p.266 |
| 32 | — | Transfer case electronic control | p.266 |
| 33 | — | Central gateway module/Side blind zone alert | p.266 |
| 34 | — | Video processing module | p.266 |
| 35 | — | Hands free closure release | p.266 |
| 36 | — | Exterior lighting module 2 | p.266 |
| 37 | — | Passenger memory seat module | p.266 |
| 38 | — | Trailer 2 | p.266 |
| 39 | — | Right front/Right rear window | p.266 |
| 42 | — | Amplifier | p.266 |
| 43 | — | Park assist module | p.266 |
| 49 | — | Trailer | p.267 |
| 50 | — | Driver seat | p.267 |
| 51 | — | Left front/Left rear window | p.267 |
| 52 | — | Passenger seat | p.267 |
| 55 | — | Run | p.267 |
More fuse pages in the manual
Diagrams and printed legends we can’t host. Check the box name printed on a diagram before counting positions.