1985 GMC K2500 4WD HD PICKUP Oil Capacity, Types, & Filters
Your essential guide to 1985 GMC K2500 4WD HD PICKUP oil change is here! No more searching – find all the critical oil specs for your 1985 GMC K2500 4WD HD 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 K2500 4WD HD 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) | 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) | 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 |
Select Your 1985 GMC K2500 4WD HD 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)
OEM Oil Filter:
Oil Filter Replaces:
25014831, 25160561, 6438384, 89060468 and 12576499, 19210285, 19256044, 25010324, 25014377, 6437462, 89017342
1985 GMC K2500 4WD HD 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)
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)
OEM Oil Filter:
Oil Filter Replaces:
25014831, 25160561, 6438384, 89060468
1985 GMC K2500 4WD HD 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)
Oil Drain Plug Torque:
N/A
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:
Oil Filter Replaces:
25014831, 25160561, 6438384, 89060468
1985 GMC K2500 4WD HD 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)
Oil Drain Plug Torque:
13-20 ft/lbs (Oil Drain Plug)
Notes:
N/A