Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 GMC Terrain SLFACTORY OEM SERVICE PROCEDURE
Quick Lookups: Fluids
| FLUID CAPACITIES | |||||||
|---|---|---|---|---|---|---|---|
| Fluid Type | Application | Standard | Metric | Fluid Spec | Note | S/H | |
| Air Cond Compressor Oil | 5.01 OZS. | 0.14 L | PAG 46 | S | |||
| Air Cond Refrigerant | R-1234yf,w/KRV | 0.91 LBS. | 0.41 KG | R-1234yf | S | ||
| Air Cond Refrigerant | R-134a,w/o KRV | 1.10 LBS. | 0.49 KG | R-134a | S | ||
| Automatic Transmission Fluid | Fluid Change - Drain Plug | N/A | N/A | Automatic Transmission Fluid DEXRON VI | Fluid Capacity is between: 5.3 - 6.3 qts. All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. | S | |
| Automatic Transmission Fluid | Overhaul | N/A | N/A | Automatic Transmission Fluid DEXRON VI | Fluid Capacity is between: 9.0 - 10 qts. All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. | S | |
| Automatic Transmission Fluid | Valve Body Cover Removal | N/A | N/A | Automatic Transmission Fluid DEXRON VI | Fluid Capacity is between 2.1 - 3.2 qts. All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. | S | |
| Brake Fluid | N/A | N/A | DOT 3 Hydraulic Brake Fluid | S | |||
| Differential Gear Oil | Rear Axle,Differential Clutch Oil Fill | 0.42 QTS. | 0.39 L | Pentosin CHF-11S | Correct fill level is to the bottom of the fill plug hole. | S | |
| Differential Gear Oil | Rear Axle,Differential Lubricant Fill | 0.79 QTS. | 0.74 L | DEXRON LS Hypoid Fluid | Correct fill level is 0 to 10mm (0.39in) below the fill plug hole. | S | |
| Engine Coolant | 7.00 QTS. | 6.62 L | 50/50 mixture of DEX-COOL and clean, drinkable water | All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. | S | ||
| Engine Oil | FWD | w/Filter | 4.20 QTS. | 3.97 L | API - SAE 0W-20 | Use only engine oil licensed to the dexos1 specification, or equivalent, of the proper SAE viscosity grade. ACDelco dexos1 Synthetic Blend is recommended. | S |
| Fuel Tank | FWD | 14.80 GALS. | 56.02 L | S | |||
| Transfer Case Fluid | Power Transfer Unit | 0.53 QTS. | 0.5 L | Transfer Case Fluid | GM Part No. 88900401. | S | |
| Windshield Washer Fluid | N/A | N/A | Windshield Washer Fluid | Follow the Manufacturer's Instructions for the mixture ratio. Automotive windshield washer fluid that meets regional freeze protection requirements. | S | ||
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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