SAE 10w30 any major brand. If you have over 100,000 miles on this truck I recommend a High Mileage blend.
donkey, you need frying oil
5W30
ON the bottom of the motor.
5 qts.
Need engine size.
1988 GMC Sierra Pick-up truck
5 quarts or just under 4 liters
10W30 Gastrol GTX works real good.
The newer differentials take a synthetic oil but I do not know which type
no, they have different bellhousings and oil pans
Using a Sierra Classic 1500 Series Truck I came up with 6.1 quarts
0w80 synthetic gear oil.