Line Pressure Check Procedure: Notes

Tools Required

• J 35752  Oil Pressure Gage Adapter. See Special Tools .
• J 21867  Universal Pressure Gage Set. See Special Tools .

IMPORTANT: This test should only be performed at a normal operating fluid temperature of 50-80°C (122-176°F).
1. Raise the vehicle. Support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the left splash shield from vehicle. Refer to Splash Shield Replacement - Engine - Left in Body Front End.
Fig 1: View Of Pressure Tap Bolt
Courtesy of GENERAL MOTORS CORP.
3. Remove the pressure tap bolt (2) from the rear of the transaxle.
Fig 2: View Of Pressure Gauge And Oil Pressure Gauge Adapter
Courtesy of GENERAL MOTORS CORP.
4. Install into the line pressure tap at the rear of the transaxle.
5. Install J 21867  into J 35752  .
6. Lower the vehicle.
7. Route hose over the front fender and through the driver's window so that it can be read from the passenger compartment.
8. Connect the scan tool to the Data Link Connector (DLC) and display the engine RPM.
9. Apply the parking brake and block the vehicle wheels.
10. Press the brake pedal fully and start the engine.
11. Display engine speed (RPM) on the scan tool.
12. Place the manual selector in the drive (D) range and record the line pressure at idle speed (600-700 RPM).
13. Press the accelerator pedal fully/wide open throttle and record the line pressure in the drive (D) range at stall speed (2,400-2,700 RPM). Release the accelerator pedal.
14. Keeping the brake pedal fully pressed, place the selector lever in the reverse (R) range and record the line pressure at idle speed (600-700 RPM).
15. Press the accelerator pedal fully/wide open throttle and record the line pressure in the reverse (R) range at stall speed (2,400-2,700 RPM). Release the accelerator pedal.
16. Keep the brake pedal pressed.
17. Place the manual selector in Low range. Record the line pressure at idle speed (600-700 RPM).
18. Press the accelerator pedal fully/wide open throttle and record line pressure in Low range at stall speed (2,400-2,700 RPM). Release the accelerator pedal.
19. Keeping the brake pedal fully pressed, place the manual selector in Reverse range and record line pressure at idle speed (600-700 RPM).
20. Press the accelerator pedal fully/wide open throttle and record line pressure in Reverse range at stall speed (2,400-2,700 RPM). Release the accelerator pedal.
21. Place the manual selector in Park range and turn the ignition switch to LOCK.
22. Remove the scan tool from the vehicle.
23. Remove J 21867  from the passenger compartment.
24. Raise the vehicle. Support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
25. Remove J 21867  from J 35752  .
26. Remove J 35752  from the line pressure tap at the rear of the transaxle.
NOTE: Refer to Fastener Notice in Cautions and Notices.
27. Install the line pressure tap bolt into the line pressure tap at the rear of the transaxle.

    Tighten:  Tighten the line pressure tap bolt to 7.5 N.m (66 lb in).

28. Install the left splash shield. Refer to Splash Shield Replacement - Engine - Left in Body Front End.
29. Lower the vehicle.