{"id":19314,"date":"2024-12-10T02:00:41","date_gmt":"2024-12-10T07:00:41","guid":{"rendered":"https:\/\/gm-techlink.com\/?p=19314"},"modified":"2024-12-11T13:10:56","modified_gmt":"2024-12-11T18:10:56","slug":"lower-case-extension-and-oil-pan-comparison","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=19314","title":{"rendered":"Lower Case Extension and Oil Pan Comparison"},"content":{"rendered":"<p style=\"font-weight: 400;\">When replacing the Lower Case Extension (LCE) (Fig. 12) on 2019-2025 Silverado 1500, Sierra 1500; 2020-2025 CT4; 2023-2024 Colorado and Canyon models equipped with the 2.7L engine (RPO L2R, L3B), it also must be determined if a plastic or aluminum oil pan should be used.<\/p>\n<p style=\"font-weight: 400;\">The lower structural extension of the 2.7L engine block houses the oil pump and balance shafts.<\/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-19303\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2024\/12\/F12-Case-3.png\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 12<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\">To validate the correct LCE, locate the Part Unit Number (PUN) code on the side of the LCE. (Fig. 13)<\/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-19304\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2024\/12\/F13-Case-1.png\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 13<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\"><strong>Replacing the Oil Pan<\/strong><\/p>\n<p style=\"font-weight: 400;\">If the oil pan is being replaced, verify the size of the LCE oil flow check valve hole diameter to determine the proper service repairs.<\/p>\n<p style=\"font-weight: 400;\">If the hole diameter is 15.0 mm (Fig. 14, #1), use the plastic oil pan. If the hole diameter is 22.7 mm (Fig. 14, #2), install a check valve and an aluminum oil pan.<\/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-19305\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2024\/12\/F14-Case-2.png\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 14<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\">If the LCE is being replaced, install the LCE with the larger check valve hole diameter (22.7 mm), a check valve, and aluminum oil pan.<\/p>\n<p style=\"font-weight: 400;\">For more information, including part numbers, refer to Bulletin #24-NA-247.<\/p>\n<p style=\"font-weight: 400;\"><em>Thanks to Scott Willems<\/em><\/p>\n<p style=\"font-weight: 400;\">\n","protected":false},"excerpt":{"rendered":"<p>When replacing the Lower Case Extension (LCE) (Fig. 12) on 2019-2025 Silverado 1500, Sierra 1500; 2020-2025 CT4; 2023-2024 Colorado and Canyon models equipped with the 2.7L engine (RPO L2R, L3B), [&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":[190],"tags":[],"class_list":["post-19314","post","type-post","status-publish","format-standard","hentry","category-2024-december-a"],"_links":{"self":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/19314","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=19314"}],"version-history":[{"count":2,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/19314\/revisions"}],"predecessor-version":[{"id":19316,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/19314\/revisions\/19316"}],"wp:attachment":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=19314"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=19314"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=19314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}