{"id":14225,"date":"2021-01-14T15:03:49","date_gmt":"2021-01-14T20:03:49","guid":{"rendered":"https:\/\/gm-techlink.com\/?p=14225"},"modified":"2021-01-20T13:56:46","modified_gmt":"2021-01-20T18:56:46","slug":"exhaust-charge-dtc-diagnostics","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=14225","title":{"rendered":"Exhaust Charge DTC Diagnostics"},"content":{"rendered":"<p>Some 2019-2021 Silverado, Sierra; 2021 Tahoe, Suburban, Yukon, and Escalade models equipped with the 5.3L engine (RPO L84) or 6.2L engine (RPO L87) (Fig. 19) may have any of the following DTCs set:<\/p>\n<ul>\n<li>DTC\u2009P3189 &#8211; Cylinder 1 Trapped High Pressure Exhaust Charge<\/li>\n<li>DTC\u2009P318A &#8211; Cylinder 2 Trapped High Pressure Exhaust Charge<\/li>\n<li>DTC\u2009P318B &#8211; Cylinder 3 Trapped High Pressure Exhaust Charge<\/li>\n<li>DTC\u2009P318C &#8211; Cylinder 4 Trapped High Pressure Exhaust Charge<\/li>\n<li>DTC\u2009P318D &#8211; Cylinder 5 Trapped High Pressure Exhaust Charge<\/li>\n<li>DTC\u2009P318E &#8211; Cylinder 6 Trapped High Pressure Exhaust Charge<\/li>\n<li>DTC\u2009P318F &#8211; Cylinder 7 Trapped High Pressure Exhaust Charge<\/li>\n<li>DTC\u2009P3190 &#8211; Cylinder 8 Trapped High Pressure Exhaust Charge<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-14216\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/01\/F19-exhaust-3-L87.jpg\" alt=\"\" width=\"740\" height=\"480\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/01\/F19-exhaust-3-L87.jpg 740w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/01\/F19-exhaust-3-L87-300x195.jpg 300w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/01\/F19-exhaust-3-L87-85x55.jpg 85w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/01\/F19-exhaust-3-L87-200x130.jpg 200w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><strong>Fig. 19<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>In the cylinder deactivation system, the intake and exhaust lifters are disabled consecutively so that a low pressure charge is trapped in the cylinder. In the event of a mechanical failure with the valvetrain, a high pressure charge can be trapped in the cylinder, which causes a DTC to set.<\/p>\n<p>When reviewing the Service Information for these DTCs, it may be difficult to isolate the concern with the correct cylinder. The concern may be caused by a cylinder on the opposite bank from the location of the DTC.<\/p>\n<p>Inspect the other side of the engine bank for any valvetrain concerns associated with these DTCs.<\/p>\n<p>&nbsp;<\/p>\n<p><em>&#8211; Thanks to Richard Renshaw<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Some 2019-2021 Silverado, Sierra; 2021 Tahoe, Suburban, Yukon, and Escalade models equipped with the 5.3L engine (RPO L84) or 6.2L engine (RPO L87) (Fig. 19) may have any of the [&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-14225","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/14225","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=14225"}],"version-history":[{"count":2,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/14225\/revisions"}],"predecessor-version":[{"id":14243,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/14225\/revisions\/14243"}],"wp:attachment":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}