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Owner’s manual specs

2018 GMC Sierra Specs: Oil Capacity, Fluids, Maintenance Schedule & Fuse Box

Figures for the 2018 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: 4.3L V6, 5.3L V8, 6.0L V8, 6.2L V8. Figures that differ by engine say which engine they are for.

Fluids & capacities

All engines

4.3L V6

5.3L V8

6.0L V8

6.2L V8

Maintenance schedule

Normal service schedule

Use this for ordinary driving.

ServiceWhen
Replace engine air cleaner filter. (3)

Source: 2018 GMC Sierra / Sierra Denali Owner Manual, page 450

Every 45,000 mi(72,000 km)
Replace passenger compartment air filter. (1)

Source: 2018 GMC Sierra / Sierra Denali Owner Manual, page 450

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.

Source: 2018 GMC Sierra / Sierra Denali Owner Manual, page 450

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.

ServiceWhen
Change automatic transmission fluid and filter.

Source: 2018 GMC Sierra / Sierra Denali Owner Manual, page 452

Every 45,000 mi(72,000 km)
Replace engine air cleaner filter. (3)

Source: 2018 GMC Sierra / Sierra Denali Owner Manual, page 452

Every 45,000 mi(72,000 km)
Replace passenger compartment air filter. (1)

Source: 2018 GMC Sierra / Sierra Denali Owner Manual, page 452

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.

Source: 2018 GMC Sierra / Sierra Denali Owner Manual, page 452

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

  1. Display the OIL LIFE REMAINING on the DIC. If the vehicle does not have DIC buttons, the vehicle must be in P (Park) to access this display. See Driver Information Center (DIC) (Uplevel and Denali Cluster) 0 160 or Driver Information Center (DIC) (Base Level Cluster) 0 158.
  2. Press and hold V, or the trip odometer reset stem if the vehicle does not have DIC buttons, for several seconds. The oil life will change to 100%.
  3. Display the OIL LIFE REMAINING on the DIC. If the display shows 100%, the system is reset.
  4. Allow the engine to idle (500- 800 rpm) for at least one minute. Slowly release the brake pedal.
  5. Keep the engine running and check the transmission fluid temperature on the Driver Information Center (DIC). See Driver Information Center (DIC) (Uplevel and Denali Cluster) 0 160 or Driver Information Center (DIC) (Base Level Cluster) 0 158.
  6. Using the transmission fluid temperature reading, determine and perform the appropriate check procedure. If the transmission fluid temperature reading is not within the required temperature ranges, allow the vehicle to cool, or operate the vehicle until the appropriate transmission fluid temperature is reached.

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 not be covered by the vehicle warranty.

(Continued) automatic transmission fluid listed in Recommended Fluids and Lubricants 0 456.

Too much or too little fluid can damage the transmission.

(Continued) transmission to overheat.

Source: 2018 GMC Sierra / Sierra Denali Owner Manual, page 354

Fuse box locations & fuse chart

Engine Compartment Fuse Block

What each fuse protects

FuseAmpsProtectsSource
3—Antilock brake system pumpp.383
4—Instrument panel BEC 1p.383
5—Passenger motorized seat beltp.383
6—4WD transfer case electronic controlp.383
7—Electric park brakep.383
8—Instrument panel BEC 2p.383
9—Driver motorized seat beltp.383
10—Rear window defoggerp.383
11—Starterp.383
12—Cooling fan 1p.383
13—Cooling fan 2p.383
16—Trailer reverse lampsp.383
18—Fuel pumpp.383
19—Integrated chassis control modulep.383
20—Electronic suspension control modulep.383
21—Fuel pump power modulep.383
22—Upfitter 1p.383
23—Upfitter 2p.383
24—Front wiperp.383
25—Antilock brake system valvep.383
26—Upfitter 2p.383
27—Upfitter 3p.383
28—Right parking lampsp.383
30—Upfitter 3p.383
31—Upfitter 4p.383
32—Upfitter 4p.383
33—Reverse lampsp.383
34—Engine control module/Ignitionp.383
35—Air conditioning clutchp.383
36—Heated mirrorsp.383
37—Upfitter 1p.383
39—Miscellaneous/ Ignitionp.383
40—Transmission/ Ignitionp.383
41—Fuel pump 2p.383
42—Cooling fan clutchp.383
43—Enginep.383
45—Fuel injectors B-evenp.384
46—O2 Sensor Bp.384
47—Throttle controlp.384
48—Hornp.384
49—Fog lampsp.384
50—O2 Sensor Ap.384
51—Engine control modulep.384
52—Interior heaterp.384
53—Accessory power module/TPM pumpp.384
54—Front washerp.384
55—Air conditioning/ Battery regulated voltage controlp.384
56—Air conditioning module/ Battery packp.384
58—Headlampsp.384
59—Fuel pumpp.384
60—Upfitter 2p.384
61—Upfitter 3p.384
62—Upfitter 4p.384
63—Trailer parking lampsp.384
64—Run/Crankp.384
65—Upfitter 1p.384
66—Fuel pump 2p.384
69—Rear window defoggerp.384
70—Engine control modulep.384
71—Vacuum pump/ Cooling fan clutchp.384
72—CKT 95p.384
73—CKT 92p.384
74—Electric running boards (if equipped)p.384
75—Fuel pump prime/ MGU motorp.384
76—Fuel pump prime / MGU motorp.384
77—Cabin pump motorp.384
78—Vacuum pump switchp.384
79—Vacuum pumpp.384

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.

open 52 Rear sliding window close Instrument Panel Fuse Block (Left) The left instrument panel fuse block access door is on the driver side edge of the instrument panel.

Source: 2018 GMC Sierra / Sierra Denali Owner Manual, page 386

What each fuse protects

FuseAmpsProtectsSource
2—Special equipment option/Retained accessory powerp.387
3—Universal remote system/Interior rearview mirrorp.387
6—Body control module 3p.387
7—Body control module 5p.387
8—Driver window switch/ Mirror switchp.387
10—Accessory power outlet/Retained accessory powerp.387
11—Accessory power outlet batteryp.387
12—Accessory power outlet 1/Cigarette lighterp.387
13—Discrete logic ignition switchp.387
14—Switch backlightingp.387
22—Heating, ventilation, and air conditioning/ Auxiliary heating, ventilation, and air conditioning/Ignitionp.388
23—Instrument cluster/ Ignition sensing diagnostic module/ Ignitionp.388
25—Data link connector/ Driver seat modulep.388
26—Passive entry/Passive start/Heating, ventilation, and air conditioningp.388
29—Park enable/ Electrically adjustable pedalsp.388
30—Special equipment optionp.388
31—Accessory/Run/Crankp.388
32—Heated steering wheelp.388
34—Instrument clusterp.388
38—4WD transfer case electronic controlp.388
40—Left doorsp.388
41—Driver power seatp.388
43—Left heated, cooled or ventilated seats (if equipped)p.388
44—Right heated, cooled or ventilated seats (if equipped)p.388
49—Retained accessory powerp.388
50—Run/Crankp.388

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 fuse block.

Source: 2018 GMC Sierra / Sierra Denali Owner Manual, page 385

What each fuse protects

FuseAmpsProtectsSource
2—Accessory power outlet 4p.386
7—Body control module 4p.386
8—Body control module 8p.386
9—Rear seat entertainmentp.386
10—Cargo lampp.386
15—Steering wheel controlsp.386
18—Radiop.386
20—Sunroofp.386
23—Airbag/Infop.386
26—Export/Power take off/ Special equipment option/Battery 1p.386
27—Obstacle detection/ USB portsp.386
28—Body control module 2p.386
35—Air conditioning inverterp.386
36—Amplifierp.386
37—Battery systemp.386
39—Rear sliding windowp.386
42—Right door window motorp.386
43—Front blowerp.386
44—Special equipment optionp.386
45—Body control module 6p.386
46—Body control module 7p.386
47—Passenger seatp.386
50—Retained accessory powerp.386
51—Rear sliding window openp.386

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.

All GMC repair jobs →

Other GMC Sierra years