GM Service Manual Online
For 1990-2009 cars only

Engine Cooling System Specifications Gasoline

Application

Specification

Metric

English

Cooling Type

Forced Water Circulation

Electric Cooling Fan

  • Cooling Fan Type

Electric

  • Blade Number

5

  • Cooling Fan Diameter

320 mm

12.6 in

  • Temperature at Low Speed ON

96°C

204.8°F

  • Temperature at Low Speed OFF

94.5°C

202.1°F

  • Temperature at High Speed ON

99°C

210.2°F

  • Temperature at High Speed OFF

97.5°C

207.52°F

Radiator Type - 2.0L

Cross-flow

Radiator Type - 2.5L

Down-flow

  • Core Width

701 mm

27.60 in

  • Core Height

372 mm

14.65 in

  • Core Depth

18 mm

0.71 in

Thermostat Type

Wax Expansion Pellet Type

  • Temperature - Opened Initially - 2.0L

83-87°C

181.4-188.6°F

  • Temperature - Opened Initially - 2.5L

80-84°C

144-215.2°F

  • Temperature - Perfectly Opened - 2.0L

100°C

212°F

  • Temperature - Perfectly Opened - 2.5L

97°C

206.6°F

  • Temperature - Perfectly Closed - 2.0L

78-82°C

172.4-179.6°F

  • Temperature - Perfectly Closed - 2.5L

77-81°C

170.6-177.8°F

  • Stroke - Perfectly Opened

8 mm

0.315 in

Water Pump Type

Centrifugal

  • Impeller Diameter

65 mm

2.56 in

  • Impeller Blade Number

6

Engine Cooling System Specifications Diesel

Application

Specification

Unit

Standard

Cooling System

Cooling System Type

--

Pressurized

Coolant

  • Capacity

L (qt)

9 (9.5)

Thermostat

  • Type

--

Wax Pallet

  • Temperature (Opened Initially)

°C (°F)

78-82°C (172-180°F)

  • Temperature (Completely Open)

°C (°F)

95°C (203°F)

  • Temperature (Completely Closed)

°C (°F)

75°C (167°F)

Cooling Fan

  • Fan

--

Axial Flow Type

  • Number of Blades

EA

7 (Main)/9 (Aux)

  • Diameter

mm (in)

Main : 408 mm (16.06 in)

Aux: 291 mm (11.5 in)

  • ON Temperature at Low Speed

°C (°F)

91°C (195°F)

  • OFF Temperature at Low Speed

°C (°F)

89°C (192°F)

  • ON Temperature at Mid Speed

°C (°F)

94°C (201.2°F)

  • OFF Temperature at Mid Speed

°C (°F)

92°C (197.6°F)

  • ON Temperature at High Speed

°C (°F)

97°C (192°F)

  • OFF Temperature at High Speed

°C (°F)

95°C (203°F)

Surge Tank

  • Open Pressure of the Pressure Valve

kPa/psi

140 (20)

  • Open Pressure of the Vacuum Valve

kPa/psi

10 (1.5)

Water Pump

  • Type

--

Centrifugal

  • Impeller Diameter

mm (in)

85 mm (3.35 in)

  • Number of Impeller Blades

EA

7

Radiator

  • Type

mm (in)

Cross Flow

  • Core Width

mm (in)

607 mm (23.96 in)

  • Core Height

mm (in)

414 mm (16.3 in)

  • Core Depth

mm (in)

27 mm (1.063 in)