{"id":19280,"date":"2024-11-26T15:42:21","date_gmt":"2024-11-26T20:42:21","guid":{"rendered":"https:\/\/gm-techlink.com\/?p=19280"},"modified":"2024-11-26T15:42:21","modified_gmt":"2024-11-26T20:42:21","slug":"follow-all-guidelines-to-determine-hybrid-ev-battery-stability-return-shipping-requirements","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=19280","title":{"rendered":"Follow All Guidelines to Determine Hybrid\/EV Battery Stability, Return Shipping Requirements"},"content":{"rendered":"<p style=\"font-weight: 400;\">Before returning the high-voltage battery (Fig. 6) of the 2023-2025 LYRIQ; 2024-2025 Blazer EV, Equinox EV, Silverado EV, Sierra EV; 2022-2025 HUMMER EVs; and 2022-2025 BrightDrop models, there are a number of criteria to follow in order to determine the internal stability of the battery and the proper core return shipping method.<\/p>\n<p style=\"font-weight: 400;\">\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400; text-align: center;\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-19244\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2024\/11\/F06-Battery-pack-5.png\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 6<\/strong><\/p>\n<p style=\"font-weight: 400;\">\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\">If the vehicle has any of the following DTCs set, there are several additional checks that need to be performed to help determine the proper repair instructions to follow.<\/p>\n<p style=\"font-weight: 400;\"><strong>Current DTCs<\/strong><\/p>\n<ul>\n<li>P0AA6 (Hybrid\/EV Battery Voltage System Isolation Lost)<\/li>\n<li>U359E (Hybrid\/Electric Vehicle Battery Pack 2 Isolation Fault)<\/li>\n<li>P0AE3 (Hybrid\/Electric Vehicle Battery Precharge Contactor Circuit Stuck Open)<\/li>\n<li>P0C78 (Hybrid\/Electric Vehicle Battery System Precharge Time Too Long)<\/li>\n<li>U1666 (Lost Communication with Hybrid\/Electric Vehicle Battery Pack Communication Module on Private Bus 1)<\/li>\n<li>U1667 (Lost Communication with Hybrid\/Electric Vehicle Battery Pack Communication Module on Private Bus\u20093)<\/li>\n<li>U2426 (Hybrid\/Electric Vehicle Battery Pack Communication Module Lost Communication with Hybrid\/Electric Vehicle Battery Cut-Off Actuator on Private CAN Bus 1)<\/li>\n<li>U2427 (Hybrid\/Electric Vehicle Battery Pack Communication Module Lost Communication with Hybrid\/Electric Vehicle Battery Cut-Off Actuator on Private CAN Bus 2)<\/li>\n<li>U2BFC (Hybrid\/Electric Vehicle High Voltage Battery Pack Thermal Event Damage)<\/li>\n<li>P1C34 (Hybrid\/EV Battery Pack Current Sensor \u2013 Temperature Sensor Circuit Low)<\/li>\n<li>U35B5 (Hybrid\/Electric Vehicle Battery Monitoring Module Performance)<\/li>\n<\/ul>\n<p style=\"font-weight: 400;\">\n<p style=\"font-weight: 400;\"><strong>History DTCs<\/strong><\/p>\n<ul>\n<li>P0AA6 (Hybrid\/EV Battery Voltage System Isolation Lost)<\/li>\n<li>U359E (Hybrid\/Electric Vehicle Battery Pack 2 Isolation Fault)<\/li>\n<\/ul>\n<p style=\"font-weight: 400;\">\n<p style=\"font-weight: 400;\">All repairs must be documented in a Technical Assistance Center (TAC) case. Refer to Bulletin #23-NA-151 for complete details. All information in the bulletin must be completed as outlined.<\/p>\n<p style=\"font-weight: 400;\">The information presented in the bulletin addresses high-voltage battery stability, the potential for loss of isolation, vehicle handling based on the condition of the high-voltage battery and battery pack return shipping requirements.<\/p>\n<p style=\"font-weight: 400;\"><strong>Follow All Checklist Guidelines<\/strong><\/p>\n<p style=\"font-weight: 400;\">Be sure to follow the Hybrid\/EV Stability Checklist in the bulletin that covers vehicle inspection guidelines and high-voltage battery removal inspection and analysis. These steps, which will help determine the correct storage and shipping procedures, include:<\/p>\n<ul>\n<li>Inspecting the coolant level. (Fig. 7)<\/li>\n<\/ul>\n<p style=\"font-weight: 400;\">\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400; text-align: center;\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-19245\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2024\/11\/F07-Battery-pack-1.png\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 7<\/strong><\/p>\n<p style=\"font-weight: 400;\">\n<p>&nbsp;<\/p>\n<ul>\n<li>Checking the GDS2 session log for Hybrid\/EV Vehicle Battery Pack Thermal Stability Data.<\/li>\n<li>Moving the vehicle to a stable location.<\/li>\n<li>Starting a TAC case.<\/li>\n<li>Disabling high voltage at the A4 Hybrid\/EV Battery Pack.<\/li>\n<li>Inspecting all battery pack HV connectors and headers. (Fig. 8)<\/li>\n<\/ul>\n<p style=\"font-weight: 400;\">\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400; text-align: center;\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-19246\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2024\/11\/F08-Battery-pack-2.png\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 8<\/strong><\/p>\n<p style=\"font-weight: 400;\">\n<p>&nbsp;<\/p>\n<ul>\n<li>Removing the HV battery pressure equalizer vent and inspection plug and checking for moisture and coolant. (Fig. 9)<\/li>\n<\/ul>\n<p style=\"font-weight: 400;\">\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400; text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-19247\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2024\/11\/F09-Battery-pack-3.png\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 9<\/strong><\/p>\n<p style=\"font-weight: 400;\">\n<p>&nbsp;<\/p>\n<ul>\n<li>Performing the Hybrid Battery Pack Coolant Passage Leak Test.<\/li>\n<\/ul>\n<p style=\"font-weight: 400;\">\n<p style=\"font-weight: 400;\">Refer to Bulletin #23-NA-151 for more information.<\/p>\n<p style=\"font-weight: 400;\">\n<p style=\"font-weight: 400;\"><em>Thanks to John Sauer<\/em><\/p>\n<p style=\"font-weight: 400;\">\n<p style=\"font-weight: 400;\">\n","protected":false},"excerpt":{"rendered":"<p>Before returning the high-voltage battery (Fig. 6) of the 2023-2025 LYRIQ; 2024-2025 Blazer EV, Equinox EV, Silverado EV, Sierra EV; 2022-2025 HUMMER EVs; and 2022-2025 BrightDrop models, there are a [&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":[189],"tags":[],"class_list":["post-19280","post","type-post","status-publish","format-standard","hentry","category-2024-november-c"],"_links":{"self":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/19280","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=19280"}],"version-history":[{"count":1,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/19280\/revisions"}],"predecessor-version":[{"id":19281,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/19280\/revisions\/19281"}],"wp:attachment":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=19280"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=19280"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=19280"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}