SMU - Revised Air Conditioning (A/C) System Performance Test
| Subject: | Revised Air Conditioning (A/C) System Performance Test |
| Models: | 2003 Chevrolet Silverado |
| 2003 GMC Sierra |
| 2003-2004 Cadillac Escalade, Escalade ESV, Escalade EXT |
| 2003-2004 Chevrolet Avalanche, Suburban, Tahoe |
| 2003-2004 GMC Denali, Denali XL, Sierra Denali, Yukon, Yukon XL |
This bulletin is being issued to revise the Air Conditioning (A/C) System Performance Test in the Heating, Ventilation and Air Conditioning sub-section of the Service Manual. Please replace the current information in the Service Manual with the following information.
The following information has been updated within SI. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page.
The A/C Performance Tables found in the A/C System Performance Test have been updated as follows:
Ambient Air Temperature | Relative Humidity | Service Port Pressure | Maximum Left Center Discharge Air Temperature | |
|---|---|---|---|---|
Low Side | High Side | |||
13-18°C (55-65°F) | 0-100% | 150-246 kPa (22-36 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) |
Above 40% | 179-317 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% | 300-430 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) |
Ambient Air Temperature | Relative Humidity | Service Port Pressure | Maximum Discharge Air Temperature | ||
|---|---|---|---|---|---|
Low Side | High Side | Left Front Center | Left Rear | ||
13-18°C (55-65°F) | 0-100% | 150-280 kPa (22-41 psi) | 540-990 kPa (78-144 psi) | 11°C (52°F) | 14°C (57°F) |
19-24°C (66-75°F) | Below 40% | 187-328 kPa (27-48 psi) | 680-114 kPa (99-165 psi) | 15°C (59°F) | 18°C (64°F) |
Above 40% | 214-370 kPa (31-54 psi) | 780-1240 kPa (113-180 psi) | 16°C (61°F) | 20°C (68°F) | |
25-29°C (76-85°F) | Below 35% | 266-386 kPa (39-56 psi) | 1000-1370 kPa (135-199 psi) | 19°C (66°F) | 22°C (72°F) |
35-60% | 280-405 kPa (41-59 psi) | 1050-1390 kPa (152-202 psi) | 20°C (68°F) | 23°C (73°F) | |
Above 60% | 300-431 kPa (44-63 psi) | 1080-1440 kPa (157-209 psi) | 21°C (70°F) | 25°C (77°F) | |
30-35°C (86-95°F) | Below 30% | 328-459 kPa (48-67 psi) | 1260-1650 kPa (183-239 psi) | 23°C (73°F) | 26°C (79°F) |
30-50% | 344-482 kPa (50-70 psi) | 1280-1670 kPa (186-242 psi) | 25°C (77°F) | 28°C (82°F) | |
Above 50% | 365-516 kPa (53-75 psi) | 1310-1700 kPa (190-247 psi) | 27°C (81°F) | 30°C (86°F) | |
36-41°C (96-105°F) | Below 20% | 397-523 kPa (58-76 psi) | 1560-1950 kPa (226-283 psi) | 27°C (81°F) | 30°C (86°F) |
20-40% | 405-545 kPa (59-79 psi) | 1570-1950 kPa (228-283 psi) | 29°C (84°F) | 32°C (90°F) | |
Above 40% | 431-572 kPa (63-83 psi) | 1580-1950 kPa (229-283 psi) | 31°C (88°F) | 34°C (93°F) | |
42-46°C (106-115°F) | Below 20% | 471-585 kPa (68-85 psi) | 1870-2200 kPa (271-319 psi) | 30°C (86°F) | 33°C (92°F) |
Above 20% | 482-611 kPa (70-89 psi) | 1870-2180 kPa (271-316 psi) | 33°C (92°F) | 36°C (97°F) | |
47-49°C (116-120°F) | Below 30% | 545-661 kPa (79-96 psi) | 2120-2430 kPa (308-353 psi) | 35°C (95°F) | 37°C (99°F) |
