1994 GMC Trucks Topkick

Fluids Capacities and Specifications

Engine Oil Capacities
Crankcase
366 (6.0 L)
Less Filter8 quarts(7.5 L)
Oil Change With Filter9.4 quarts(8.9 L)
403 (6.6 L)
Less Filter19 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 vehicles equipped with the LUBERFINER 750-C, add 14 quarts (13.25 L).
Oil Change With Filter21 quarts(20.0 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 vehicles equipped with the LUBERFINER 750-C, add 14 quarts (13.25 L).
427 (7.0 L)
Less Filter8 quarts(7.50 L)
Oil Change With Filter9.4 quarts(8.90 L)
Automatic Transmission Fluid Capacities
Automatic Transmission
AT542 (For Oil Pan Filter Change)30 pints(14 L)

Add two pints (one liter) when changing spin-on filter.
AT545 (For Oil Pan Filter Change)40 pints(19 L)

Add two pints (one liter) when changing spin-on filter.
MT643 (For Oil Pan Filter Change)36 pints(17 L)

Add two pints (one liter) when changing spin-on filter.
MT653 (For Oil Pan Filter Change)36 pints(17 L)

Add two pints (one liter) when changing spin-on filter.
Manual Transmission Fluid Capacities
Manual Transmission
RT660912.0 pints(5.8 L)
RT661012.0 pints(5.8 L)
RTO661012.0 pints(5.8 L)
RT661316.0 pints(7.5 L)
RT7608LL19.5 pints(9.3 L)
RT860915.0 pints(7.0 L)
FS5004A, FS4005B, FS4005C9.5 pints(4.5 L)
5005A, FS5005C10.5 pints(5 L)
FS510618 pints(8.5 L)
FS6105A, FS6105B19 pints(9 L)
FS620618.0 pints(8.5 L)
FS720619.0 pints(9 L)
T8607B36.0 pints(17 L)
Cooling System Capacity
Cooling System
366 (6.0 L)
With Manual Transmission26.0 quarts(24.6 L)
With Automatic Transmission24.0 quarts(22.7 L)
403 (6.6 L)
With Manual Transmission32.0 quarts(30.3 L)
With Automatic Transmission30.0 quarts(28.4 L)
427 (7.0 L)
With Manual Transmission26 quarts(24.60 L)
With Automatic Transmission24.60 quarts(22.7 L)
Fuel Tank Capacities
Fuel Tank
Standard50 gallons(189.25 L)
Optional35 gallons(132.50 L)
Optional60 gallons(227.14 L)
Optional70 gallons(265.00 L)

Two 35 gallon tanks.
Optional100 gallons(378.50 L)

Two 50 gallon tanks.
Air-conditioning Capacities
Air Conditioning Refrigerants Capacity2.5 pounds(1.134 kg)

R-134a
Rear Axle Oil Capacities
Rear Axle
Single Speed
Eaton
15040S21.0 pints(10.0 L)
19050S25.0 pints(12.0 L)
190555S34.0 pints(16.0 L)
21065D34.0 pints(16.0 L)
21065S34.0 pints(16.1 L)
22065S34.0 pints(16.1 L)
22070S40.0 pints(19.0 L)
23070S40.0 pints(19.0 L)
23070P39.0 pints(18.4 L)
23085C40.0 pints(19.0 L)
23105S48.0 pints(22.7 L)
26085P41.0 pints(19.5 L)
Rockwell
23160S35.0 pints(16.5 L)
Two-Speed
Eaton
15040T24.0 pints(11.5 L)
19050T33.0 pints(16.0 L)
19055T35.0 pints(16.0 L)
21065T33.5 pints(16.0 L)
22065T33.5 pints(16.0 L)
23070T39.5 pints(18.5 L)
26085T41.0 pints(19.5 L)
Tandem Axles
DS341 & DS341P
Front39.0 pints(19.0 L)
Rear36.0 pints(17.0 L)
DT341
Front34.0 pints(16.0 L)
Rear36.0 pints(17.0 L)
DS402, DS402P
Front39.0 pints(19.0 L)
Rear36.0 pints(17.0 L)
DT402P
Front34.0 pints(16.0 L)
Rear34.0 pints(16.0 L)

Many people saved thousands of dollars by doing some technical service procedures for their 1994 GMC Trucks Topkick by themselves. The easiest type of technical maintenance is changing engine oil, axles oil, manual and automatic transmission oil. Changing break fluid in 1994 GMC Trucks Topkick 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 1994 GMC Trucks Topkick. 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 1994 GMC Trucks Topkick. 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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