General Motors

CHEVROLET & GMC COOLING SYSTEM CAPACITY

Application⁽¹⁾

Quarts

250"

C10/30, K10/K30 Man. Trans.

⁽²⁾15

C10/30, K10/K30 Auto. Trans.

⁽²⁾ 15.5

G10/30

P10/30

13.5

292"

C10/30, K10/K30 Man. Trans.

⁽²⁾15

C10/30, K10/K30 Auto. Trans.

⁽²⁾15.5

P10/30

13.5

305"

C10 & C20, K10

17.5

C20

⁽²⁾18

G10

⁽⁴⁾19

350" Gas

C10/30 K10/30

⁽²⁾17.5

G10/30

P20/30

⁽³⁾16.5

350" Diesel 18.0

400"

K10/30 Auto. Trans.

⁽⁵⁾⁽⁶⁾18

G20/30 Auto. Trans.

⁽³⁾20

454"

C10 Auto. Trans.

22.5

C20/30 Auto Trans.

⁽⁷⁾24

⁽¹⁾

When General Motors is referred to within this manual (rather than Chevrolet or GMC), the numerical vehicle series designations will be abbreviated for commom reference to both Chevrolet and GMC. Chevrolet will use numerical series designations as listed. GMC models will be identified as follows: 10 = 1500; 20 = 2500; 30 = 3500

⁽²⁾	Add 1/2 qt. with Air Conditioning.

⁽³⁾	Add 1/2 qt with Heavy Duty Cooling.

⁽⁴⁾	Add 1 qt. with Air Conditioning.

⁽⁵⁾	Add 1 qt. with Heavy Duty Cooling.

⁽⁶⁾	Add 2 qt. with Air Conditioning.

⁽⁷⁾	Add 1/2 qt. with Trans. Oil Cooler.

CHEVROLET & GMC PRESSURE CAP

Application	PSI
All Models	15

CHEVROLET & GMC THERMOSTAT

Application

⁽¹⁾ Rating °F

All

195

⁽¹⁾	Thermostat should be full open at 25°F above stamped rating and fully closed at 10°F below stamped rating.