Fluids Capacities and Specifications

Engine Oil Capacities
Crankcase
6.6 L	19 quarts	(18.0 L)
Additional oil is required with auxiliary oil filter systems. Make sure to add enough extra oil to fill the auxiliary oil filter system. For LUBERFINER 750-C systems, add 14 qts. (13.25 L).
6.5 L	8.0 quarts	(7.8 L)
6.0 L	8.0 quarts	(7.5 L)
Automatic Transmission Fluid Capacities
Automatic Transmission
AT545 (For oil pan filter change)	40.0 pints	(19.0 L)
Add two pints (one liter) when changing spin-on type filter.
Manual Transmission Fluid Capacities
Manual Transmission
FS4205B	12.5 pints	(5.9 L)
FS5205A	12.5 pints	(5.9 L)
Cooling System Capacity
Cooling System
6.6 L
With Manual Transmission	30.5 quarts	(28.9 L)
With Automatic Transmission	28.5 quarts	(27.0 L)
6.5 L
With Manual Transmission	30.5 quarts	(28.9 L)
With Automatic Transmission	28.5 quarts	(27.0 L)
6.0 L
With Manual Transmission	25.0 quarts	(22.8 L)
With Automatic Transmission	23.0 quarts	(21.8 L)
Fuel Tank Capacities
Fuel Tank
R.H. Mount (Standard)	60.0 gallons	(227.1 L)
L.H. Mount (Optional)	60.0 gallons	(227.1 L)
R.H. Mount (Optional)	35.0 gallons	(132.5 L)
Rear Axle Oil Capacities
Rear Axle
19050S	25.0 pints	(12.0 L)
Add 2 pints (1.0 L) when hubs are replaced.
21060S	34.0 pints	(16.1 L)
Add 2 pints (1.0 L) when hubs are replaced.

Many people saved thousands of dollars by doing some technical service procedures for their 1998 GMC Trucks B7 Medium Duty Chassis by themselves. The easiest type of technical maintenance is changing engine oil, axles oil, manual and automatic transmission oil. Changing break fluid in 1998 GMC Trucks B7 Medium Duty Chassis is also is a simple task. If you want to change engine oil, for instance, by yourself and save a couple of bucks you need to know how much this fluid engine oil is needed for 1998 GMC Trucks B7 Medium Duty Chassis. If you fill engine or axles of your car with oil to the brim it may damage your vehicle engine or axles and void manufacturer warranty. Good news! We have this information and we give it to you for free.

Note: all capacities are approximate. When adding, be sure to fill to the appropriate level, as recommended in user manual for your 1998 GMC Trucks B7 Medium Duty Chassis. Keep in mind that all information here is provided “as is” without any warranty of any kind.

Note: not all air conditioning refrigerants are the same. If the air conditioning system in your vehicle needs refrigerant, be sure the proper refrigerant is used. If you're not sure, ask your dealer.

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