{"id":13599,"date":"2020-08-31T17:18:57","date_gmt":"2020-08-31T21:18:57","guid":{"rendered":"https:\/\/gm-techlink.com\/?p=13599"},"modified":"2020-09-02T16:56:11","modified_gmt":"2020-09-02T20:56:11","slug":"poor-drivers-side-a-c-performance","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=13599","title":{"rendered":"Poor Driver\u2019s Side A\/C Performance"},"content":{"rendered":"<p class=\"western\"><span style=\"font-size: 12pt;\">The air conditioning may blow warmer on the driver\u2019s side of the vehicle on some 2019-2020 Silverado 1500 and Sierra 1500 models built at the Silao assembly plant (the plant is identified by a G in the 11<sup>th<\/sup> position of the VIN). <\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\">On affected vehicles, the A\/C pressures will be lower than normal. For example, the low side may be 15-25 PSI (103-172 kPa) while the high side may be 140-160 PSI (965-1103 kPA). A check of the system for a low refrigerant charge should indicate that the system is full and no leaks should be found. <\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\">In addition, a temperature test of the refrigerant lines will show both the inlet and outlet lines at the condenser to be similar and very hot. The temperature across the condenser&#8217;s cooling fins will be near ambient temperature. <\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\">The cause of these conditions could be the A\/C condenser internally bypassing due to a mispositioned block off plate. If the block off plate is out of position, the refrigerant does not flow through the condenser&#8217;s cooling fins. As a result, hot refrigerant entering the condenser bypasses the cooling fins and exits the condenser before the refrigerant is cooled down and returned to a liquid state. <\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\">If these conditions are found, the A\/C condenser (Fig. 22) will need to be replaced. Refer to the appropriate Service Information for A\/C condenser replacement.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p class=\"western\" style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-13595\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/09\/F22-condenser.png\" alt=\"\" width=\"740\" height=\"480\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/09\/F22-condenser.png 740w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/09\/F22-condenser-300x195.png 300w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/09\/F22-condenser-85x55.png 85w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/09\/F22-condenser-200x130.png 200w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><span style=\"font-size: 12pt;\"><b>Fig. 22<\/b><\/span><\/p>\n<p>&nbsp;<\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\"><i>&#8211; Thanks to Jim Will<\/i><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The air conditioning may blow warmer on the driver\u2019s side of the vehicle on some 2019-2020 Silverado 1500 and Sierra 1500 models built at the Silao assembly plant (the plant [&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":[1],"tags":[],"class_list":["post-13599","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/13599","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=13599"}],"version-history":[{"count":3,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/13599\/revisions"}],"predecessor-version":[{"id":13625,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/13599\/revisions\/13625"}],"wp:attachment":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13599"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13599"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13599"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}