{"id":20221,"date":"2025-07-31T02:00:07","date_gmt":"2025-07-31T06:00:07","guid":{"rendered":"https:\/\/gm-techlink.com\/?p=20221"},"modified":"2025-08-05T11:02:27","modified_gmt":"2025-08-05T15:02:27","slug":"loss-of-a-c-and-warm-air-conditions","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=20221","title":{"rendered":"Loss of A\/C and Warm Air Conditions"},"content":{"rendered":"<p style=\"font-weight: 400;\">There may be a loss of air conditioning, weak cooling or warm air coming out of the vents on some 2024-2025 Silverado 1500 and Sierra 1500 trucks.<\/p>\n<p style=\"font-weight: 400;\">These conditions may be due to the desiccant chamber of the air conditioning condenser.<\/p>\n<p style=\"font-weight: 400;\">Check for scoring (Fig. 7, red arrows) on the inside of the desiccant chamber, which may cause a slow leak of refrigerant at the receiver\/dryer desiccant cap.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400; text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-20209\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2025\/08\/F07-des-1.jpg\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 7<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\">Inspect the cap extensively using a refrigerant sniffer (GE-50078 Electronic Leak Detector) or a soapy solution to identify any leaks. Replace the condenser if a leak is found. (Fig. 8, condenser (#1) and radiator (#2) \u2013 L84\/L87 engines) Refer to Air Conditioning Compressor Replacement in the appropriate Service Information.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400; text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-20210\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2025\/08\/F08-des-4.jpg\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 8<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\">On vehicles equipped with the 2.7L engine (RPO L3B) or 3.0L diesel engine (RPO LZ0), remove the charge air cooler, condenser, fan motor and radiator as an assembly. (Fig. 9)<\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400; text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-20211\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2025\/08\/F09-des-2.jpg\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 9<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\">On vehicles equipped with the 5.3L or 6.2L engine (RPO L84, L87), remove the condenser, fan motor, radiator and transmission fluid auxiliary cooler, if equipped, as an assembly. (Fig. 10)<\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400; text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-20212\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2025\/08\/F10-des-3.jpg\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 10<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\">Refer to Bulletin #25-NA-170 for more details, including the plant code and condenser part number.<\/p>\n<p style=\"font-weight: 400;\"><em>Thanks to Dave MacGillis<\/em><\/p>\n<p style=\"font-weight: 400;\">\n","protected":false},"excerpt":{"rendered":"<p>There may be a loss of air conditioning, weak cooling or warm air coming out of the vents on some 2024-2025 Silverado 1500 and Sierra 1500 trucks. These conditions may [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[209],"tags":[],"class_list":["post-20221","post","type-post","status-publish","format-standard","hentry","category-2025-july-b"],"_links":{"self":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/20221","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=20221"}],"version-history":[{"count":2,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/20221\/revisions"}],"predecessor-version":[{"id":20223,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/20221\/revisions\/20223"}],"wp:attachment":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=20221"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=20221"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=20221"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}