Chevrolet 1997 Tahoe Owner's Manual page 350

Cooling System Capacity (Approximate)
After refill, the level must be rechecked. See "Cooling System" in the Index.
ENGINE VIN QTY out
"VORTEC" 5700 R 17.5 Quarts (16.5
L)
"VORTEC" 7400 J 25 Quarts (23.5 L)
Crankcase Capacity (Approximate)
After refill, the level must be rechecked. See "Engine Oil" in the Index.
ENGINE VIN ANTITY TH
"VORTEC" 5700 R 5 Quarts (4.8 L)
"VORTEC" 7400 J 7 Quarts (6.5 L)
?Oil filter should be changed at every oil change.
QTY With Rear Heater
20 Quarts (19 L)
27.5 Quarts (26 L)
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