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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:

A/C Performance Table - Pickup with 4.3L, 4.8L, 5.3L, 6.0L and 8.1L Engines and Utility without Rear A/C

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)

A/C Performance Table - Utility with Rear A/C

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)