GMC T-Series 1999, Owner'S Manual

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Rear Axle Lubricant Capacity
Single Speed Axle Lubricant, Quarts (Liters)
15040S 10.7 (10.1) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19060S 13.5 (12.8) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21060S 15.5 (14.7) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23080S 21.5 (20.3) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26105S 19.0 (18.0) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Two
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Speed Axle Lubricant, Quarts (Liters)
19060T 13.5 (12.8) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21060T 15.5 (14.7) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22060T 17.2 (16.6) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23080T 21.5 (20.3) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Above capacities (volumes) are approximate.
Tandem Axles Lubricant, Quarts (Liters)
DS404 (front) 16.0 (15.1) . . . . . . . . . . . . . . . . . . . . . . .
RS404 (rear) 15.5 (14.7) . . . . . . . . . . . . . . . . . . . . . . . .
Above capacities (volumes) are approximate.
Fuel Tank Capacity
Model Gallons (Liters)
Standard 50.0 (189.3) . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional** 100.0 (378.5) . . . . . . . . . . . . . . . . . . . . . . .
**Two 50
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gallon (189 L) tanks
Above capacities (volumes) are approximate.
Air Conditioning Refrigerants
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.
Normal Maintenance
Replacement Parts
Allison Transmission External Filters
Engine AC Part Number
403 (6.6L) PF897 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
366 (6.0L) PF897 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Compressor Filter
Air Compressor GM Part Number
Bendix Tu
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Flo 550 (13.2 CFM) 2467368 . . . . . . . . . .