{"id":13824,"date":"2020-10-28T13:40:43","date_gmt":"2020-10-28T17:40:43","guid":{"rendered":"https:\/\/gm-techlink.com\/?p=13824"},"modified":"2020-10-28T13:40:43","modified_gmt":"2020-10-28T17:40:43","slug":"dtcs-set-in-the-tcm","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=13824","title":{"rendered":"DTCs Set in the TCM"},"content":{"rendered":"<p>Some 2020 Corvettes may have an illuminated Check Engine MIL and a reduced engine power message on the instrument cluster with no noticeable performance issues. DTCs P1967 (Serial Data Message Safety Performance 1) and\/or P1968 (Serial Data Message Safety Performance 2) may be set in the Transmission Control Module (TCM).<\/p>\n<p>Follow the diagnostics for these DTCs in the appropriate Service Information. If there are other DTCs set in the TCM, diagnose those DTCs first.<\/p>\n<p>If only DTCs P1967 or P1968 are set, do not request a TCM replacement (Fig. 21) per #PIP5703 (TCM Restriction). Perform the even and odd-related clean procedures in GDS2 and a transmission service fast learn. After completing these procedures, re-evaluate the condition.<\/p>\n<p>These conditions are not a performance issue with the TCM or transmission assembly. A software update is currently being evaluated.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-13845\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/10\/F21-TCM-1.png\" alt=\"\" width=\"740\" height=\"481\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/10\/F21-TCM-1.png 740w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/10\/F21-TCM-1-300x195.png 300w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/10\/F21-TCM-1-85x55.png 85w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2020\/10\/F21-TCM-1-200x130.png 200w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><strong>Fig. 21<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>For additional information, refer to #PIP5757.<\/p>\n<p>&nbsp;<\/p>\n<p><em>&#8211; Thanks to Steve Schipansky<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Some 2020 Corvettes may have an illuminated Check Engine MIL and a reduced engine power message on the instrument cluster with no noticeable performance issues. DTCs P1967 (Serial Data Message [&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-13824","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/13824","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=13824"}],"version-history":[{"count":1,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/13824\/revisions"}],"predecessor-version":[{"id":13846,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/13824\/revisions\/13846"}],"wp:attachment":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13824"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13824"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13824"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}