Engine Cooling System*
12.4 qt
11.8 L
Applies to: 2.7L L4 Engine - 1500 Series
Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 459
Owner’s manual specs
2020 GMC Sierra Specs: Oil Capacity, Fluids, Maintenance Schedule & Fuse Box
Figures for the 2020 GMC Sierra, copied from GMC’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: 2.7L L4, 4.3L V6, 5.3L V8, 6.2L V8, 6.6L V8. Figures that differ by engine say which engine they are for.
Fluids & capacities
2.7L L4
Engine Oil with Filter
6 qt
5.7 L
Applies to: 2.7L L4 Engine - 1500 Series · with filter
Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 459
4.3L V6
Engine Cooling System*
12.2 qt
11.5 L
Applies to: 4.3L V6 Engine - 1500 Series
Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 459
5.3L V8
Engine Cooling System*
13.5 qt
12.8 L
Applies to: 5.3L V8 Engine - 1500 Series (L82)
Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 459
Engine Cooling System*
13.8 qt
13.1 L
Applies to: 5.3L V8 Engine - 1500 Series (L84)
Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 459
6.2L V8
Engine Cooling System*
13.3 qt
12.6 L
Applies to: 6.2L V8 Engine - 1500 Series
Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 459
6.6L V8
Engine Cooling System*
15.9 qt
15.1 L
Applies to: 6.6L V8 Gas Engine - 2500 Series and 3500 Series (L8T)
Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 459
Maintenance schedule
Normal service schedule
Use this for ordinary driving.
| Service | When |
|---|---|
| If the vehicle is not equipped with the engine air filter life system, replace engine air cleaner filter. (2) Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 445 | Every 45,000 mi(72,000 km) |
| Replace passenger compartment air filter. (1) Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 445 | Every 22,500 mi(36,000 km) |
| Rotate tires and perform Required Services. Check engine oil level and oil life percentage. Change engine oil and filter, if needed. Check engine air filter life percentage and status. Change engine air filter, if needed. Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 445 | Every 7,500 mi(12,000 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. Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 448 | Every 45,000 mi(72,000 km) |
| Replace passenger compartment air filter. (1) Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 448 | Every 22,500 mi(36,000 km) |
| Rotate tires and perform Required Services. Check engine oil level and oil life percentage. Change engine oil and filter, if needed. Check engine air filter life percentage and status. Change engine air filter, if needed. Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 448 | Every 7,500 mi(12,000 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
- Display the oil life percentage on the DIC. See Driver Information Center (DIC) (Base Level) 0 148 or Driver Information Center (DIC) (Midlevel and Uplevel) 0 149.
- Press the thumbwheel on the steering wheel, or the trip odometer reset stem if the vehicle does not have DIC
- If the display changes to 100%, the system is reset.
You’ll know it worked: The oil life will change to 100%.
Use of the incorrect automatic transmission fluid may damage the vehicle, and the damage may (Continued) Caution (Continued) not be covered by the vehicle warranty.
Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 342
Fuse box locations & fuse chart
Engine Compartment Fuse Block
Where to find it
engine compartment fuse block is in the engine compartment, on the passenger side of the vehicle for 1500 and driver side of vehicle for 2500/3500.
Lift the cover to access the fuse block.
Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 371
What each fuse protects
| Fuse | Amps | Protects | Source |
|---|---|---|---|
| 2 | — | High-beam right | p.372 |
| 4 | — | Headlamp right | p.372 |
| 5 | — | Headlamp | p.374 |
| 6 | — | TIM | p.372 |
| 8 | — | Fog lamp | p.372 |
| 9 | — | VKM | p.372 |
| 11 | — | Police upfitter | p.372 |
| 13 | — | Washer front | p.372 |
| 14 | — | Washer rear | p.372 |
| 15 | — | MSB driver | p.372 |
| 17 | — | IECL 1 | p.372 |
| 18 | — | DC/AC inverter | p.374 |
| 19 | — | DC/AC inverter | p.372 |
| 20 | — | IECR 2 (LD) / EBCM2 (HD) | p.372 |
| 21 | — | MSB pass | p.372 |
| 22 | — | IECL 2 | p.372 |
| 23 | — | Rear window defogger | p.374 |
| 24 | — | EBCM 1 | p.372 |
| 27 | — | Horn | p.373 |
| 32 | — | Rear window defogger | p.373 |
| 33 | — | Heated mirror | p.373 |
| 34 | — | Parking lamp left | p.373 |
| 35 | — | Parking lamp | p.374 |
| 36 | — | Run/Crank | p.374 |
| 37 | — | Euro trailer | p.373 |
| 38 | — | TIM | p.373 |
| 40 | — | Misc ignition | p.373 |
| 41 | — | Trailer parking lamp | p.373 |
| 42 | — | Park lamp right | p.373 |
| 43 | — | Second fuel pump | p.374 |
| 45 | — | Second fuel pump | p.373 |
| 47 | — | Transmission control module ignition | p.373 |
| 49 | — | Transmission control module | p.373 |
| 50 | — | A/C clutch | p.373 |
| 51 | — | Transfer case control module | p.373 |
| 52 | — | Front wiper | p.373 |
| 53 | — | Center high-mounted stop lamp | p.373 |
| 54 | — | Trailer reverse lamp | p.373 |
| 55 | — | Trailer back-up lamp | p.373 |
| 56 | — | SADS | p.373 |
| 57 | — | TTPM | p.373 |
| 58 | — | Starter motor (LD & HD DSL) | p.373 |
| 59 | — | A/C clutch | p.374 |
| 61 | — | VES | p.373 |
| 62 | — | Integrated chassis control module/CVS | p.373 |
| 63 | — | Trailer battery | p.373 |
| 64 | — | Starter Motor (LD & HD DSL) / Cool Fan Clutch (HD Gas) | p.374 |
| 65 | — | Auxiliary underhood electrical center | p.373 |
| 66 | — | Cooling fan motor left | p.373 |
| 67 | — | Active fuel management 2 | p.373 |
| 69 | — | Starter Pinion (LD) / Starter Motor (HD Gas) | p.373 |
| 70 | — | Starter Pinion (LD) / Starter Motor (HD Gas) | p.374 |
| 71 | — | Cooling fan | p.373 |
| 72 | — | Cooling fan right | p.373 |
| 73 | — | Trailer stop/turn lamp left | p.373 |
| 74 | — | TIM | p.373 |
| 76 | — | Electric RNG BDS | p.374 |
| 77 | — | Powertrain | p.374 |
| 78 | — | Engine control module | p.374 |
| 79 | — | Auxiliary battery | p.374 |
| 80 | — | Cabin cooling pump | p.374 |
| 81 | — | Trailer stop/turn lamp right | p.374 |
| 82 | — | TIM | p.374 |
| 83 | — | FTZM | p.374 |
| 84 | — | Trailer brake | p.374 |
| 85 | — | ENG | p.374 |
| 86 | — | Engine control module | p.374 |
| 87 | — | Injector B even | p.374 |
| 88 | — | O2 B sensor | p.374 |
| 89 | — | O2 A sensor | p.374 |
| 90 | — | Injector A odd | p.374 |
Instrument Panel Fuse Block (Left)
Where to find it
Instrument Panel Fuse Block (Left) The left instrument panel fuse block access door is on the driver side edge of the instrument panel.
Pull off the cover to access the fuse block.
Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 374
Instrument Panel Fuse Block (Right)
Where to find it
Instrument Panel Fuse Block (Right) The right instrument panel fuse block access door is on the passenger side edge of the instrument panel.
Pull off the cover to access the front of the fuse block.
Source: 2020 GMC Sierra/ Sierra Denali Owner Manual, page 376
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.