1985 GMC C2500 PICKUP Oil Capacity, Types, & Filters

Your essential guide to 1985 GMC C2500 PICKUP oil change is here! No more searching – find all the critical oil specs for your 1985 GMC C2500 PICKUP, including oil capacity, recommended oil viscosity (type), and the correct oil filter.

We cover all engine options, categorized by their specific engine codes, ensuring you get the right information for your specific configuration. Keep reading to discover everything you need for your next 1985 GMC C2500 PICKUP oil change!

Scroll Table ➜

Engine & Code	Oil Capacity	Oil Viscosity/Type	Oil Filter
4.8L 6-cylinder [M] M	6 quarts (with filter)	SAE 10W-30 (Above -18°C) SAE 15W-40 (Above -12°C) SAE 20W-20 (Above -7°C)	GM 19431429 GM 25010908 GM 12731179
5.7L 8-cylinder [T] T	5 quarts (with filter)	SAE 10W-30 (Above -18°C) SAE 15W-40 (Above -12°C) SAE 20W-20 (Above -7°C)	GM 19431429 GM 25010908
6.2L 8-cylinder [J] J Diesel	7 quarts (with filter)	SAE 10W-30 (Below 16°C) SAE 15W-40 (Above -18°C) 30 (Above 0°C)	GM 19431429
7.4L 8-cylinder [W] W	7 quarts (with filter)	SAE 10W-30 (Above -18°C) SAE 15W-40 (Above -12°C) SAE 20W-20 (Above -7°C)	GM 19431429

Select Your 1985 GMC C2500 PICKUP Engine Option

4.8L 6-cylinder Engine Code [M] M

Engine:

4.8L 6-cylinder [M] M [aka 4.8L L6 (Gas)]

Body & Trims:

Base, High Sierra, Sierra Classic

Oil Capacity:

6 quarts (with filter)

Oil Viscosity/Type:

SAE 10W-30 (Above -18°C)
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)

OEM Oil Filter:

GM 19431429, GM 25010908 and GM 12731179

Oil Filter Replaces:

25014831, 25160561, 6438384, 89060468 and 12576499, 19210285, 19256044, 25010324, 25014377, 6437462, 89017342

1985 GMC C2500 PICKUP 4.8L 6-cylinder [M] M oil change details

Oil Grade:

API*

Oil Capacity:

6 quarts. (with filter). This is the capacity with the oil filter installed. Always check the oil level after refilling.

Oil Viscosity/Type:

SAE 10W-30 (Above -18°C) - SAE 10W-30 is preferred.
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)

Name of Oil Filter:

N/A

Wix Oil Filter:

Wix Air Filter:

N/A

Coolant Capacity:

15.3 quarts

Oil Drain Plug Torque:

20 ft/lbs (Oil Drain Plug)

Notes:

N/A

5.7L 8-cylinder Engine Code [T] T

Engine:

5.7L 8-cylinder [T] T [aka 5.7L V8 (Gas)]

Body & Trims:

Base, High Sierra, Sierra Classic

Oil Capacity:

5 quarts (with filter)

Oil Viscosity/Type:

SAE 10W-30 (Above -18°C)
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)

OEM Oil Filter:

GM 19431429 and GM 25010908

Oil Filter Replaces:

25014831, 25160561, 6438384, 89060468

1985 GMC C2500 PICKUP 5.7L 8-cylinder [T] T oil change details

Oil Grade:

API*

Oil Capacity:

5 quarts. (with filter). This is the capacity with the oil filter installed. Always check the oil level after refilling.

Oil Viscosity/Type:

SAE 10W-30 (Above -18°C) - SAE 10W-30 is preferred.
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)

Name of Oil Filter:

N/A

Wix Oil Filter:

Wix Air Filter:

Coolant Capacity:

17.4 quarts - For models WithOut Air Conditioning (AC).
18 quarts - For models with Air Conditioning (AC).

Oil Drain Plug Torque:

12-20 ft/lbs (Oil Drain Plug)

Notes:

N/A

6.2L 8-cylinder Engine Code [J] J Diesel

Engine:

6.2L 8-cylinder [J] J Diesel [aka 6.2L V8 (Diesel)]

Body & Trims:

Base, High Sierra, Sierra Classic

Oil Capacity:

7 quarts (with filter)

Oil Viscosity/Type:

SAE 10W-30 (Below 16°C)
SAE 15W-40 (Above -18°C)
30 (Above 0°C)

OEM Oil Filter:

GM 19431429

Oil Filter Replaces:

25014831, 25160561, 6438384, 89060468

1985 GMC C2500 PICKUP 6.2L 8-cylinder [J] J Diesel oil change details

Oil Grade:

CF-4

Oil Capacity:

7 quarts. (with filter). This is the capacity with the oil filter installed. Always check the oil level after refilling.

Oil Viscosity/Type:

SAE 10W-30 (Below 16°C)
SAE 15W-40 (Above -18°C) - SAE 15W-40 is the preferred oil.
30 (Above 0°C)

Name of Oil Filter:

N/A

Wix Oil Filter:

Wix Air Filter:

N/A

Coolant Capacity:

24.8 quarts

Oil Drain Plug Torque:

13-20 ft/lbs (Oil Drain Plug)

Notes:

N/A

7.4L 8-cylinder Engine Code [W] W

Engine:

7.4L 8-cylinder [W] W [aka 7.4L V8 (Gas)]

Body & Trims:

Base, High Sierra, Sierra Classic

Oil Capacity:

7 quarts (with filter)

Oil Viscosity/Type:

SAE 10W-30 (Above -18°C)
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)

OEM Oil Filter:

GM 19431429

Oil Filter Replaces:

25014831, 25160561, 6438384, 89060468

1985 GMC C2500 PICKUP 7.4L 8-cylinder [W] W oil change details

Oil Grade:

API*

Oil Capacity:

7 quarts. (with filter). This is the capacity with the oil filter installed. Always check the oil level after refilling.

Oil Viscosity/Type:

SAE 10W-30 (Above -18°C) - SAE 10W-30 is preferred.
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)

Name of Oil Filter:

N/A

Wix Oil Filter:

Wix Air Filter:

Coolant Capacity:

23.2 quarts - For models WithOut Air Conditioning (AC).
24.3 quarts - For models with Air Conditioning (AC).

Oil Drain Plug Torque:

20 ft/lbs (Oil Drain Plug)

Notes:

N/A

GMC C2500 PICKUP – Engine Oil details by Year