GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 39500-B

  1. Park the vehicle inside a building or in a shaded area.
  2. Place the transmission in PARK or NEUTRAL.
  3. Open the hood.
  4. Secure the hood.
  5. Remove the low pressure hose cap.
  6. Remove the high pressure hose cap.

  7. Object Number: 229676  Size: MH
  8. Connect the low pressure hose (1).
  9. Connect the high pressure hose (2).
  10. Start the engine.
  11. Stabilize the engine to a normal idling condition.
  12. Press the button in the ON position.
  13. Press the MAX/REC/RC button in the ON position.
  14. Adjust the blower speed to HI.
  15. Adjust the temperature control to full COLD.
  16. Carefully follow the manufacturer's instructions.

The normal temperature guideline for pressures readings is approximately 25--30°C (77--86°F).

The normal pressure guideline at ambient for the low pressure side is approximately 127--265 kPa (18.5--38.4 psi).

The normal pressure guideline at ambient for the high pressure side is approximately 1,373--1,765 kPa (199--255.9 psi).

Pressure

Temperature

(kPa)

(psi)

(°C)

(°F)

36

5.3

-20

-4.4

67

9.7

-15

5

104

15

-10

14

147

21

-5

23

196

28

0

32

255

37

5

41

314

45

10

50

392

57

15

59

471

68

20

68

569

82

25

77

677

98

30

86

785

114

35

95

912

132

40

104

1059

154

45

113

1216

176

50

122