{"id":13558,"date":"2020-08-24T15:05:00","date_gmt":"2020-08-24T19:05:00","guid":{"rendered":"https:\/\/gm-techlink.com\/?p=13558"},"modified":"2020-09-02T10:14:11","modified_gmt":"2020-09-02T14:14:11","slug":"front-end-rattle-sound-at-highway-speeds","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=13558","title":{"rendered":"Front End Rattle Sound at Highway Speeds"},"content":{"rendered":"<p class=\"western\"><span style=\"font-size: 12pt;\">A whine, rattle or flutter sound may be heard coming from the front end of some 2020 Blazer models when driving at highway speeds. The sound is dependent on wind direction, so it may only occur while driving in certain directions. <\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\">Check the front upper aero shutter lower air guide seal. The seal may not be properly nested between the front impact beam and the front fascia grille blocker\/EA foam. <\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\">The lower air guide seal may not have the proper preform, which allows it to lay on top of the front fascia grille blocker\/EA foam. (Fig. 8, A) If the rubber seal is not tucked between the grille blocker and front impact beam, it may produce the rattle or whine sound when exposed to highway speed winds. <\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\">To correct the condition, remove the front fascia assembly and manually roll the lower air guide seal over and down the top of the impact beam. (Fig. 8, B)<\/span><\/p>\n<p class=\"western\" style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-13546\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/08\/F08-front-seal-1.png\" alt=\"\" width=\"740\" height=\"480\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/08\/F08-front-seal-1.png 740w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/08\/F08-front-seal-1-300x195.png 300w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/08\/F08-front-seal-1-85x55.png 85w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/08\/F08-front-seal-1-200x130.png 200w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><span style=\"font-size: 12pt;\"><b>Fig. 8<\/b><\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\">When reinstalling the front fascia assembly, ensure that the lower air guide seal is positioned between the front impact beam and the fascia assembly. It may help to apply adhesive tape to the forward edge of the seal to hold it in proper position before installing the front fascia assembly. <\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\">Refer to Bulletin #20-NA-146 for additional information. <\/span><\/p>\n<p class=\"western\"><span style=\"font-size: 12pt;\"><i>&#8211; Thanks to Pamela Francisco<\/i><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A whine, rattle or flutter sound may be heard coming from the front end of some 2020 Blazer models when driving at highway speeds. The sound is dependent on wind [&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-13558","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/13558","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=13558"}],"version-history":[{"count":2,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/13558\/revisions"}],"predecessor-version":[{"id":13624,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/13558\/revisions\/13624"}],"wp:attachment":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13558"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13558"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}