Automatic Transmission
DEXRON-HP Automatic Transmission Fluid (GM Part No. 19331925, in Canada 19300537).
Applies to: Automatic Transmission
Owner’s manual specs
2018 Cadillac CT6 Specs: Oil Capacity, Fluids, Maintenance Schedule & Fuse Box
Figures for the 2018 Cadillac CT6, 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, 3.0L V6, 3.6L V6. 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 0 327.
Applies to: Engine Oil
2.0L L4
Cooling System - Engine
10.9 qt
10.3 L
Applies to: 2.0L L4 Engine with Rear A/C
Cooling System - Engine
10.4 qt
9.8 L
Applies to: 2.0L L4 PLUG-IN Engine
Cooling System - Engine
3.3 qt
3.1 L
Applies to: 2.0L L4 PLUG-IN Engine - RESS
Cooling System - Engine
4.2 qt
4 L
Applies to: 2.0L L4 PLUG-IN Engine - Power Electronics
Cooling System - Engine
9.1 qt
8.6 L
Applies to: 2.0L L4 Engine
Engine Oil with Filter
5 qt
4.7 L
Applies to: 2.0L L4 Engine · with filter
3.0L V6
Cooling System - Engine
11.2 qt
10.6 L
Applies to: 3.0L V6 Engine
Cooling System - Engine
13 qt
12.3 L
Applies to: 3.0L V6 Engine with Rear A/C
Cooling System - Engine
13.9 qt
13.2 L
Applies to: 3.0L V6 Engine with Rear A/C and Auxiliary Radiator
Engine Oil with Filter
6 qt
5.7 L
Applies to: 3.0L V6 Engine · with filter
3.6L V6
Engine Oil with Filter
6 qt
5.7 L
Applies to: 3.6L V6 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) 0 163.
- Press and hold SEL to clear the CHANGE ENGINE OIL SOON message and reset the oil life at 100%.
- Lift and remove the engine air cleaner/filter.
- Inspect or replace the engine air cleaner/filter.
- Reverse Steps 1-3 to reinstall the engine air cleaner/filter cover.
You’ll know it worked: If the CHANGE ENGINE OIL SOON message is not on, the system is reset.
Fuse box locations & fuse chart
Engine Compartment Fuse Block
Where to find it
Engine Compartment Fuse Block The underhood fuse block is on the driver side of the engine compartment.
What each fuse protects
| Fuse | Amps | Protects | Source |
|---|---|---|---|
| 2 | — | Power coolant pump | p.353 |
| 4 | — | Traction power inverter 1 | p.353 |
| 5 | — | Transmission/ Ignition | p.353 |
| 7 | — | Starter motor | p.353 |
| 8 | — | Starter pinion | p.353 |
| 9 | — | Horn | p.353 |
| 13 | — | High-beam headlamps | p.353 |
| 14 | — | Air conditioning control relay | p.353 |
| 15 | — | Starter motor relay | p.353 |
| 18 | — | Right cornering LED | p.353 |
| 20 | — | High-beam headlamp relay | p.353 |
| 21 | — | Air conditioning clutch | p.353 |
| 23 | — | Coolant heater control module | p.353 |
| 24 | — | Cabin coolant pump | p.353 |
| 25 | — | Cabin coolant pump relay | p.353 |
| 26 | — | Hi fuel | p.353 |
| 27 | — | Steering column lock | p.353 |
| 28 | — | Rear heated seats | p.353 |
| 29 | — | Front heated seats | p.353 |
| 31 | — | HDLP/DRL/ Right headlamp | p.353 |
| 35 | — | Engine control module IGN2 | p.353 |
| 36 | — | Engine control module IGN1 | p.353 |
| 37 | — | Coolant pump/ Ignition coils-odd | p.353 |
| 38 | — | Ignition coils-even/ Non walk 2 | p.353 |
| 39 | — | Non walk | p.353 |
| 40 | — | Instrument cluster | p.353 |
| 42 | — | Fuel pump power module | p.353 |
| 43 | — | Instrument panel body/Ignition | p.353 |
| 44 | — | Aeroshutter | p.353 |
| 45 | — | Washer | p.353 |
| 46 | — | Front sensor | p.353 |
| 47 | — | Left cornering LED | p.353 |
| 50 | — | Engine control module relay | p.354 |
| 51 | — | Wiper speed relay | p.354 |
| 52 | — | Wiper control relay | p.354 |
| 53 | — | Headlamp control relay | p.354 |
| 60 | — | Antilock brake system pump | p.354 |
| 61 | — | Front wiper | p.354 |
| 62 | — | Headlamp leveling | p.354 |
| 63 | — | Electric brake booster module | p.354 |
| 66 | — | Transfer case control module | p.354 |
| 67 | — | Electric brake booster | p.354 |
| 68 | — | Rear seat entertainment display | p.354 |
| 69 | — | Rechargeable energy storage system coolant pump | p.354 |
| 71 | — | Anitlock brake system valve | p.354 |
Instrument Panel Fuse Block
Where to find it
Instrument Panel Fuse Block The instrument panel fuse block is behind the driver side instrument panel storage compartment.
to open latch.
Rear Compartment Fuse Block
Where to find it
Rear Compartment Fuse Block The rear compartment fuse block is behind a cover on the passenger side of the rear compartment.
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.