GM Service Manual Online
For 1990-2009 cars only

Engine Cooling System Specifications for GMC Truck GMC P42 Commercial Chassis 1998

Coolant Capacities

Application

Specification

Metric

English

4.3L (L35)

13.1 liters

13.8 quarts

5.7L (L31)

14.6 liters

15.5 quarts

7.4L (L21/L29)

21.2 liters

22.5 quarts

6.5L (L57)

23.5 liters

25 quarts

6.5L (L65)

23.4 liters

24.7 quarts