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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1550 (Heating, Ventilation, And Air Conditioning) >> Diagnostic Information and Procedures >> Air Conditioning (A/C) System Performance Test (Gas Engine w/Engine Driven Fan) >> A/C System Pressure Zone Classification - Gas Engine With Engine Driven Cooling Fan

A/C System Pressure Zone Classification - Gas Engine With Engine Driven Cooling Fan

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Fig 1: A/C System Pressure Zone Classification - Gas Engine With Engine Driven Cooling Fan
GM1533068Courtesy of GENERAL MOTORS CORP.
A/C Performance Table - Gas Engine With Engine Driven Cooling Fan

Ambient Air Temperature Relative Humidity Service Port Pressure Maximum Left Center Discharge Air Temperature
Low Side High Side
13-16°C (55-65°F) 0-100% 150-246 kPa (25-36 psi) 730-1190 kPa (106-173 psi) 12°C (54°F)
19-24°C (66-75°F) Below 40% 150-280 kPa (22-41 psi) 900-1390 kPa (131-202 psi) 14°C (57°F)
Greater than 40% 179-137 kPa (26-46 psi) 990-1500 kPa (144-218 psi) 16°C (61°F)
25-29°C (76-85°F) Below 35% 218-328 kPa (32-48 psi) 1240-1640 kPa (180-238 psi) 17°C (63°F)
35-60% 236-342 kPa (34-50 psi) 1290-1680 kPa (187-244 psi) 18°C (64°F)
Above 60% 250-365 kPa (36-53 psi) 1340-1760 kPa (194-255 psi) 20°C (68°F)
30-35°C (86-95°F) Below 30% 266-386 kPa (39-56 psi) 1500-1940 kPa (218-282 psi) 21°C (70°F)
30-50% 280-397 kPa (41-58 psi) 1540-1990 kPa (224-289 psi) 22°C (72°F)
Above 50% 330-430 kPa (44-62 psi) 1600-2070 kPa (232-300 psi) 24°C (75°F)
36-41°C (96-105°F) Below 20% 328-439 kPa (48-64 psi) 1810-2240 kPa (263-325 psi) 25°C (77°F)
20-40% 337-457 kPa (49-66 psi) 1840-2290 kPa (267-332 psi) 26°C (79°F)
Above 40% 355-474 kPa (52-69 psi) 1890-2340 kPa (274-340 psi) 27°C (81°F)
42-46°C (106-115°F) Below 20% 391-491 kPa (57-71 psi) 2130-2500 kPa (309-363 psi) 29°C (84°F)
Above 20% 397-508 kPa (58-74 psi) 2160-2550 kPa (313-370 psi) 30°C (86°F)
47-49°C (116-120°F) Below 30% 451-552 kPa (65-80 psi) 2420-2790 kPa (351-405 psi) 33°C (92°F)