2018 GMC SIERRA DENALI spark plugs replace

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
450 Service and Maintenance Maintenance Schedule
Additional Required
Services - Normal
12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi
60 000 km/37,500 mi
72 000 km/45,000 mi
84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi
120 000 km/75,000 mi
132 000 km/82,500 mi
144 000 km/90,000 mi
156 000 km/97,500 mi
168 000 km/105,000 mi
180 000 km/112,500 mi
192 000 km/120,000 mi
204 000 km/127,500 mi
216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 miRotate tires and perform Required Services.
Check engine oil level and oil life percentage.
Change engine oil and filter, if needed.
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @Replace passenger compartment air filter. (1)
@ @ @ @ @ @Inspect evaporative control system. (2)
@ @ @Replace engine air cleaner filter. (3)
@ @ @Replace spark plugs. Inspect spark plug wires.
@For GVW under 3 900 kg (8,600 lb), change
transfer case fluid, if equipped with 4WD. (4)
@For GVW over 3 900 kg (8,600 lb), change
transfer case fluid, if equipped with 4WD. (4)
@ @ @Drain and fill engine cooling system. (5)
@Visually inspect accessory drive belts. (6)
@Replace brake fluid. (7)

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
452 Service and Maintenance Maintenance Schedule
Additional Required
Services - Severe
12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi
60 000 km/37,500 mi
72 000 km/45,000 mi
84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi
120 000 km/75,000 mi
132 000 km/82,500 mi
144 000 km/90,000 mi
156 000 km/97,500 mi
168 000 km/105,000 mi
180 000 km/112,500 mi
192 000 km/120,000 mi
204 000 km/127,500 mi
216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 miRotate tires and perform Required Services.
Check engine oil level and oil life percentage.
Change engine oil and filter, if needed.
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @Replace passenger compartment air filter. (1)
@ @ @ @ @ @Inspect evaporative control system. (2)
@ @ @Replace engine air cleaner filter. (3)
@ @ @Replace spark plugs. Inspect spark plug wires.
@Change automatic transmission fluid and filter.
@ @ @For GVW under 3 900 kg (8,600 lb), change
transfer case fluid, if equipped with 4WD. (4)
@ @ @For GVW over 3 900 kg (8,600 lb), change
transfer case fluid, if equipped with 4WD. (4)
@ @ @ @ @ @Drain and fill engine cooling system. (5)
@Visually inspect accessory drive belts. (6)
@Replace brake fluid. (7)
Footnotes — Maintenance
Schedule Additional Required
Services — Severe
(1) Or every two years, whichever
comes first. More frequent
replacement may be needed if the vehicle is driven in areas with heavy
traffic, poor air quality, areas with
high dust levels or are sensitive to
environmental allergens. Filter
replacement may also be needed if
you notice reduced airflow, windows fogging up, or odors. Your local GM
Service location can help you
determine when it is the right time to
replace your filter.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
458 Service and Maintenance
Maintenance Replacement Parts Replacement parts identified below by name, part number, or specification can be obtained from your dealer.
If your vehicle has a diesel engine, see the Duramax diesel supplement for more information.
Part GM Part Number ACDelco Part Number
Engine Air Cleaner/Filter 22845992 A3181C
Oil Filter
4.3L V6 19330000 PF63E
5.3L V8; 6.2L V8 19330000 PF63E
6.0L V8 19303975 PF48E
Passenger Compartment Air Filter 23281440 CF188
Spark Plugs
4.3L V6 12622441 41 – 114
5.3L V8; 6.2L V8 12622441 41 – 114
6.0L V8 12621258 41 – 110
Wiper Blades
Driver Side – 55 cm (21.7 in) 23417074 -
Passenger Side – 55 cm (21.7 in) 23417074 -