Oil
- Viscosity
- 5W-30
- Oil type
- Full Synthetic
- Capacity (with filter)
- 5 qt
- Capacity (without filter)
- 4.7 qt
OEM notes: dexos1 Gen 2
2021 GMC Terrain Maintenance & Specs
Everything you need to maintain your 2021 GMC Terrain — oil specs, maintenance schedule, recalls, and more.
The 2021 GMC Terrain takes 5W-30 Full Synthetic with a total capacity of 5 quarts (filter included). You’ll need a 15mm socket for the drain plug, torqued to 25 Nm. The OEM oil filter is the ACDelco PF64. Note: this vehicle has 2 active recalls — check the recalls section below. Below you’ll find complete maintenance specs, fluid capacities, parts, and links to buy what you need.
Data last verified: May 3, 2026
Oil
5W-30
Full Synthetic
Buy on Amazon →
Capacity
5 qt
with filter
Drain plug
15 mm
25 Nm torque
Filter
PF64
ACDelco (OEM)
Buy on Amazon →
OEM spec: dexos1 Gen 2
Quick DIY Tips for the 2021 GMC Terrain
- Torque your drain plug to 25 Nm (18 ft-lbs) to avoid leaks or stripped threads.
- Using the OEM filter (ACDelco PF64) is recommended for warranty compliance.
- Always use 5W-30 Full Synthetic as specified by GMC — using the wrong viscosity can void your powertrain warranty.
- Check the maintenance schedule below for your next service interval.
Filter options
Drain bolt & hardware
- Socket size
- 15 mm
- Thread size
- —
- Torque spec
- 25 Nm
- Gasket type
- Rubber O-ring (reusable)
Fluid specifications
Parts & specifications
Spark Plugs
- Type
- Iridium
- Gap
- 0.040
- Quantity
- 4
- Change interval
- 100,000 mi
Battery
- Group size
- 48
- CCA
- 650
Tires
- Size
- 215/55R17
- Front pressure
- 33 PSI
- Rear pressure
- 33 PSI
Air Filter
Cabin Air Filter
Brake Pads
Wiper Blades
Maintenance schedule
Select a mileage interval above to see scheduled maintenance items.
Estimated Current Value
Original MSRP
$30,000
Private Party Value
$13,680 – $15,120
Dealer Retail Value
$15,840 – $18,000
Trade-In Value
$12,240 – $13,680
Depreciation
52%
Estimated values assume average condition and mileage for vehicle age.
Source: estimated
Safety recalls2
Technical Service Bulletins498
Torque specifications
- lug nut
- 100 ft-lbs / 135.6 Nm
- spark plug
- 18 ft-lbs / 24.4 Nm
14mm thread, aluminum head
Save by doing it yourself
A shop typically charges $70–$140 for this service. Buy the parts yourself and save.
Shop Parts for the GMC Terrain
Find oil, filters, and maintenance parts for the 2021 GMC Terrain on Amazon.
Tools & supplies
Step-by-step guide
Detailed walkthrough with tips for first-timers.
Read guide →How often to change oil
Intervals, severe service, and what your car needs.
Read guide →Synthetic vs. conventional
Which oil type is right for your engine and budget.
Read guide →Have info for this vehicle?
Help fellow owners — submit specs from your owner's manual.
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