A/C System Performance
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1995 GMC Yukon, 1995 GMC Pickup, 1995 GMC Cab & Chassis, 1995 GMC C3500 HD, and 1995 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
- Park vehicle out of direct sunlight. Open doors or windows to ventilate vehicle. Vent exhaust system, if necessary. Install manifold gauge set. Note ambient temperature and relative humidity. Close all doors and windows. Turn on A/C system. Set blower to high speed, and temperature lever to COLD position. Open vents.
- Insert A/C Diagnostic Tester (J 21213-A) into right center outlet. Place transmission in Park or Neutral. Start engine and allow it to run at 2000 RPM until outlet air reaches lowest temperature (approximately 3 minutes). See A/C SYSTEM SPECIFICATIONS table.
A/C SYSTEM SPECIFICATIONS (1)
| Ambient Temp. °F (°C) | Low Side Pressure psi (kg/cm2 ) | High Side Pressure psi (kg/cm2 ) | Air Outlet Temp. °F (°C) | ||
|---|---|---|---|---|---|
| 70 (21) | 27 (1.9) | 300 (21) | 46 (8) | ||
| 80 (27) | 28 (2.0) | 320 (23) | 50 (10) | ||
| 90 (32) | 36 (2.5) | 355 (25) | 58 (14) | ||
| 100 (38) | 45 (3.2) | 409 (29) | 68 (20) | ||
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