{"id":19820,"date":"2026-06-11T05:00:17","date_gmt":"2026-06-11T09:00:17","guid":{"rendered":"https:\/\/gm-techlink.com\/?p=19820"},"modified":"2026-06-11T11:47:54","modified_gmt":"2026-06-11T15:47:54","slug":"tcsc-top-issues-this-week","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=19820","title":{"rendered":"TCSC Top Issues This Week"},"content":{"rendered":"<p style=\"font-weight: 400;\">The Techline Customer Support Center (TCSC) is available to help dealerships with diagnostic and programming issues related to Techline Connect (TLC) and the Service Programming System (SPS).<\/p>\n<p style=\"font-weight: 400;\">TCSC has now released its latest tips to help technicians when using Techline Connect applications. (Fig. 1) Look for the latest information on TechLink each week.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400; text-align: center;\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-19778\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2025\/04\/F10-TCSC-Top-Issues-image-R.jpg\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 1<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\">To get the most out of Techline Connect, be sure to review the following items before making a call to TCSC.<\/p>\n<p style=\"font-weight: 400;\"><strong>The following information covers current issues and trends facing dealerships as of June 11, 2026.<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\"><strong>WEEKLY ISSUES<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p><strong>1. <span style=\"color: #ff0000;\">NEW<\/span> \u2013 OnStar Next Button Disappearing after Delta Programming<\/strong><\/p>\n<p>Pre-programming instructions for OnStar may indicate to run Delta programming multiple times until SPS2 indicates a same-calibration block. However, users are seeing that the Next button disappears after Delta programming instead of providing a same-calibration block message as indicated. As a result, it\u2019s not possible to proceed with further programming.<\/p>\n<p><strong>The missing Next button indicates that the OnStar Delta programming is up to date and the next programming steps can be attempted. <\/strong>(Fig. 2)<\/p>\n<p><a href=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2026\/06\/OnStar-Delta-Next-2.png\"><img decoding=\"async\" class=\"size-large wp-image-21301 aligncenter\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2026\/06\/OnStar-Delta-Next-2-1024x542.png\" alt=\"\" width=\"740\" height=\"392\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2026\/06\/OnStar-Delta-Next-2-1024x542.png 1024w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2026\/06\/OnStar-Delta-Next-2-300x159.png 300w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2026\/06\/OnStar-Delta-Next-2-768x406.png 768w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2026\/06\/OnStar-Delta-Next-2-104x55.png 104w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2026\/06\/OnStar-Delta-Next-2-780x413.png 780w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2026\/06\/OnStar-Delta-Next-2.png 1074w\" sizes=\"(max-width: 740px) 100vw, 740px\" \/><\/a><\/p>\n<p style=\"text-align: center;\">Fig. 2<\/p>\n<p>&nbsp;<\/p>\n<p><strong>2. MDI\/Scan Tool Disconnecting in SPS2, Showing Status: Disconnected in TLC<\/strong><\/p>\n<p>Users may see the MDI\/scan tool disconnect\/reconnect rapidly in SPS2, causing issues with connectivity. GM is aware of this issue and is actively investigating.<\/p>\n<p>To potentially resolve this issue, disconnect the scan tool, reboot the tool, and then reconnect.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>3. EPC Showing Incorrect Radio Hardware for 2025 Blazer EV<\/strong><\/p>\n<p>Users report that the Electronic Parts Catalog (EPC) is directing to an incompatible part for the 2025 Blazer EV.<\/p>\n<ul>\n<li>PN 85852385 is not compatible with the 2025 Blazer EV. Please order PN 85791702 instead.<\/li>\n<\/ul>\n<p>GM is working on correcting the EPC to show the correct hardware.<\/p>\n<p>Note: If you are unable to place an order for PN 85791702, please reach out to the Service Parts Assistance Center (SPAC).<\/p>\n<p>&nbsp;<\/p>\n<p><strong>4. 2021 Tahoe, Suburban, Yukon, Escalade, Corvette, Envision, CT4, CT5 Unable to Complete SDAC (Serial Authentication Data Configuration) #PIT6507<\/strong><\/p>\n<p>There is currently a known issue affecting some 2021 vehicles where the SDAC may fail. The radio, IPC, or Telematics (OnStar) modules may be the cause of these failures.<\/p>\n<p><strong>DO NOT REPLACE THE MODULE.<\/strong> This is a known SPS issue and the current workaround is to disconnect the SDGM X3 connector and re-attempt SDAC. Refer to #PIT6507 for more information, including affected vehicles.<\/p>\n<p>Engineering is aware of this concern and working on a permanent resolution.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>5. 9G8 (DRL\/AHL Disable), SK4 (Engine Idle Timeout), UTQ (Content Theft), BCN (Retail Locking) and 6N6 (Rear Window Disable) Not Yet Available on 2026 Vehicles<\/strong><\/p>\n<p>Calibrations for RPOs 9G8, SK4, UTQ, BCN and 6N6 are not yet available for model year 2026 vehicles but are planned to be released. However, there is not currently an ETA.<\/p>\n<p>Note: RPO SK4 calibrations are now available for T1 Trucks (Silverado, Sierra). T1 SUV (Tahoe, Suburban, Yukon, Escalade) is still being worked on.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>COMMON ISSUES AND HELPFUL INFORMATION<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p><strong>1. <span style=\"color: #ff0000;\">NEW<\/span> \u2013 2000-2010 Saturn (Any Model) or Pontiac Solstice Experiencing Issues in Techline Connect<\/strong><\/p>\n<p>There is currently a known issue with nearly all model year Saturn vehicles and the Pontiac Solstice where various issues may occur in Techline Connect, including E-6223, E-4399 on PCM\/BCM, vehicle stuck in Park after programming ECM\/TCM modules, or the vehicle thinking it is Manual when it is Automatic. Please reach out to TCSC with any programming issues.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>2. 2019-2021 Trax IPC Programming Issue<\/strong><\/p>\n<p>GM is aware of an issue affecting 2019-2021 Trax models where a replacement IPC may fail with E-4491 and line\/op\/error indicate (X, B0, 85).<\/p>\n<p>This issue is currently being investigated by Engineering. Please reach out to TCSC if you are experiencing this issue.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>3. ECM\/Radio\/IPC Part Missing from SPS2 Part Dropdown<\/strong><\/p>\n<p>When performing IPC Graphics programming, Radio USB, or ECM programming, you may be prompted in SPS2 to select <strong>\u201cService Hardware.\u201d<\/strong> However, this is misleading.<\/p>\n<ul>\n<li>For IPC Graphics programming, use the <strong>\u201cBoot Software Part Number 1\u201d<\/strong> found in GDS2 under Identification Information.<\/li>\n<li>For the Radio USB Programming, use the <strong>\u201cCalibration Part Number 1\u201d<\/strong> (also may be called <strong>\u201cApplication Part Number 1\u201d<\/strong>) found in GDS2 under Identification Information.<\/li>\n<li>For the ECM, use the <strong>\u201cCalibration Part Number 1\u201d<\/strong> (also may be called <strong>\u201cSoftware Module Part Number 1\u201d<\/strong>) found in GDS2 under Identification Information.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><strong>4. 2015+ Chevrolet Express SOSM E-4399 Issue and ECM VIN Write Issue<\/strong><\/p>\n<p>GM is aware of a known issue where programming current\/replacement SOSM modules (Left\/Right) will cause an E-4399 in SPS2, despite the modules having communication.<\/p>\n<p>Additionally, the VIN may not write on a replacement ECM successful programming events.<\/p>\n<p>Please reach out to TCSC for a VCI to correct either concern.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>5. Bulletin #24-NA-098: SPS Best Practices and Programming Error Troubleshooting<\/strong><\/p>\n<p>Document ID: 6662319 has been published to assist with common programming errors, descriptions and recommended helpful\/general troubleshooting for SPS errors. Please refer to this page if you encounter a programming error within SPS2\/TLC.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>6. E-9111 or E-9113\/E-9114 TCM\/MCVM Operation Errors<\/strong><\/p>\n<p>An E-9111 or E-9113\/E-9114 error may occur when programming the TCM, or after replacing the transmission assembly\/valve body, and entering the TUN\/PUN under MCVM Operations in SPS2.<\/p>\n<p>The error is caused by a mismatch in data between the vehicle\u2019s TUN\/PUN and the TUN\/PUN uploaded in the GM database. Please ensure:<\/p>\n<ul>\n<li>The complete TUN\/PUN number is entered.<\/li>\n<li>The TUN\/PUN is in capital letters.<\/li>\n<li>The number zero (0) is not a letter \u201cO\u201d.<\/li>\n<li>There are not any typos, extra characters, or spaces.<\/li>\n<\/ul>\n<p>If the TUN\/PUN is correct, open a case with TCSC and attach a clear picture of the replacement TUN\/PUN in the case, as TCSC will require these to work with Engineering and have the issue addressed.<\/p>\n<p>If you are receiving these errors via programming and the TUN\/PUN was not replaced, TCSC may still require the TUN number.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>7. Front View Camera Programming or Camera Learn Issues Specific to 2024 Colorado and Canyon (ZR2)<\/strong><\/p>\n<p>There is currently a known issue with the Front View Camera involving ONLY 2024 Colorado\/Canyon built with ZR2 and UHY, and without UWI, UKW, or ULV.<\/p>\n<p>The Front View Camera may fail to program or set loss of communication codes such as DTC U0265. The camera learn also may fail in GDS2 with various errors.<\/p>\n<p>A VCI is required to correct this problem. Please reach out to TCSC for this fix.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\"><strong>How to Contact TCSC<\/strong><\/p>\n<ul>\n<li><strong>U.S. ONLY:<\/strong> Assistance can be provided by using the CX Connect portal on Global Connect. If additional support is needed once the CX Connect case is created, contact TCSC at 1-800-828-6860. For U.S. only, a case is required for phone support.<\/li>\n<li><strong>Canada:<\/strong> Contact TCSC at 1-800-828-6860 (English) or 1-800-503-3222 (French).<\/li>\n<li><strong>All other regions:<\/strong> Contact your regional Technical Assistance team for Global Techline Support.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\"><em>&#8211; Thanks to the Techline team<\/em><\/p>\n<p style=\"font-weight: 400;\">\n","protected":false},"excerpt":{"rendered":"<p>The Techline Customer Support Center (TCSC) is available to help dealerships with diagnostic and programming issues related to Techline Connect (TLC) and the Service Programming System (SPS). TCSC has now [&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":[227,1],"tags":[],"class_list":["post-19820","post","type-post","status-publish","format-standard","hentry","category-2026-march-a","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/19820","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=19820"}],"version-history":[{"count":90,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/19820\/revisions"}],"predecessor-version":[{"id":21306,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/19820\/revisions\/21306"}],"wp:attachment":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=19820"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=19820"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=19820"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}