{"id":530401,"date":"2026-07-17T09:49:46","date_gmt":"2026-07-17T13:49:46","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/?p=530401"},"modified":"2026-07-19T11:48:23","modified_gmt":"2026-07-19T15:48:23","slug":"2011-gmc-yukon-xl-pcm-replacement-guide","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/2011-gmc-yukon-xl-pcm-replacement-guide\/","title":{"rendered":"2011 GMC Yukon XL PCM\/ECM Replacement and Common Failure Signs"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">PCM<\/div>\n<h1>2011 GMC Yukon XL PCM\/ECM Replacement and Common Failure Signs<\/h1>\n<p class=\"hero-subtitle\">The powertrain control module (PCM) in the 2011 GMC Yukon XL manages engine and transmission functions. Internal failures may cause erratic performance, diagnostic trouble codes, or complete no-start conditions.<\/p>\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>PCM controls engine and transmission operation in the 2011 GMC Yukon XL<\/li>\n<li>Replacement typically requires 1.4 hours of labor for removal and installation<\/li>\n<li>A relearn procedure of 0.5 hours is often needed after module replacement<\/li>\n<li>Factory programming requires special equipment and vehicle-specific calibration<\/li>\n<li>Internal trouble codes like P0601 may indicate PCM failure<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<p>If your 2011 GMC Yukon XL has been stalling, refusing to start, or showing internal control module trouble codes, the powertrain control module (PCM) may be failing. This critical computer manages both engine and transmission functions, so its reliability directly affects how your vehicle runs. Replacing it involves more than just swapping parts\u2014proper installation and programming are essential to restore smooth operation. Understanding the process, labor times, and common symptoms can help you make informed decisions about repairs and avoid unnecessary complications.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What the PCM Does in a 2011 GMC Yukon XL<\/h2>\n<p>The powertrain control module in your 2011 GMC Yukon XL acts as the brain for both engine and transmission systems. It processes sensor data to optimize fuel delivery, ignition timing, and shift points, ensuring efficient performance. When this module malfunctions, you may experience rough idling, poor acceleration, or even a complete no-start condition. Since the PCM also communicates with other vehicle systems, failures can trigger multiple warning lights on the dashboard. If replacement becomes necessary, you\u2019ll need <a href=\"https:\/\/www.fs1inc.com\/gm\/gmc-pcm-ecm-ecu-engine-computer\/yukon-xl-engine-computers.html\">replacement engine computers for the Yukon XL<\/a> that match your vehicle\u2019s specifications to maintain proper functionality.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Where the PCM Is Located and What Replacement Involves<\/h2>\n<p>The PCM in the 2011 GMC Yukon XL is typically located near the engine bay, though exact placement may vary slightly between the 1500 and 2500 models. Replacing it involves disconnecting the battery, removing electrical connectors, and unbolting the module from its mount. Labor time for removal and reinstallation is listed at 1.4 hours for both the 1500 and 2500 variants. After installation, a relearn procedure of 0.5 hours is often required to synchronize the new module with the vehicle\u2019s systems. Proper torque on mounting bolts helps ensure secure installation and reliable operation.<\/p>\n<figure style=\"margin:22px auto;text-align:center;max-width:720px\"><img decoding=\"async\" style=\"max-width:100%;height:auto;border:1px solid #e2e6ec;border-radius:8px\" src=\"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2026\/07\/2011-gmc-yukon-xl-pcm-location-diagram.webp\" alt=\"2011 GMC Yukon XL PCM location diagram\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">PCM mounting location on the 2011 GMC Yukon XL.<\/figcaption><\/figure>\n<div style=\"background:#f7f9fc;border:1px solid #e2e8f2;border-radius:10px;padding:18px 24px;margin:18px 0\">\n<h3 style='margin-top:0'>How to Reach the PCM on the 2011 GMC Yukon XL<\/h3>\n<ol style=\"margin:14px 0 6px 0;padding-left:26px\">\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> any debris from around the control module connector.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Disconnect<\/b> the negative battery cable.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> the ECM.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Position<\/b> the engine wiring harness lower electrical connector and engage the retainer.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Position<\/b> the engine wiring harness upper electrical connector and engage the retainer.<\/li>\n<\/ol>\n<p style='margin:10px 0 0 0'><em>Work with the ignition off, and treat the module as static-sensitive: avoid touching the connector pins at any point.<\/em><\/p>\n<\/div>\n<table style=\"width:100%;border-collapse:collapse;margin:18px 0;font-size:15px\">\n<tr>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Operation<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Configuration<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Book Time<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Powertrain Control Module R&amp;R<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Yukon XL 1500<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">1.4 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Powertrain Control Module R&amp;R<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Yukon XL 2500<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">1.4 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Powertrain Control Module Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Yukon XL 1500<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.5 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Powertrain Control Module Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Yukon XL 2500<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.5 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Engine Control Module Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Yukon XL 1500<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.5 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Engine Control Module Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Yukon XL 2500<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.5 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Engine Control Module Reset<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Yukon XL 1500<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.3 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Engine Control Module Reset<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Yukon XL 2500<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.3 hr<\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Programming Requirements After Replacement<\/h2>\n<p>After installing a new PCM in your 2011 GMC Yukon XL, the factory procedure requires reprogramming to match your vehicle\u2019s VIN and calibration. This process demands specialized equipment and software, as incorrect programming may lead to performance issues or diagnostic errors. However, <a href=\"https:\/\/www.fs1inc.com\/2011-gmc-yukon-xl-1500-5-3l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\">a VIN-programmed replacement unit<\/a> from Flagship One arrives pre-configured, eliminating the need for on-site programming and reducing the risk of setup mistakes. Always capture ECM data with a scan tool before removal to preserve vehicle-specific settings.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Symptoms of a Failing PCM<\/h2>\n<p>A failing PCM in the 2011 GMC Yukon XL may cause a range of symptoms, from intermittent stalling to complete no-start conditions. You might notice rough idling, poor acceleration, or transmission shifting problems, as the module controls both engine and gearbox functions. Diagnostic trouble codes related to internal memory or processor faults, such as <a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\">an internal control module memory error<\/a>, often appear when the PCM is compromised. In some cases, the vehicle may fail to communicate with a scan tool, making diagnosis more challenging. Addressing these issues promptly can prevent further drivability problems.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Module Trouble Codes on the 2011 GMC Yukon XL<\/h2>\n<p>The 2011 GMC Yukon XL may store specific trouble codes when the PCM experiences internal faults. These codes typically indicate issues with memory, processor function, or communication errors within the module itself.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:18px 0;font-size:15px\">\n<tr>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Code<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Meaning<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Full Guide<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0601<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Internal memory checksum error<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\" style=\"color:#0563C1\"><b><u>Full P0601 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0602-control-module-programming-error\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0602<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0602-control-module-programming-error\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Control module programming error<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0602-control-module-programming-error\/\" style=\"color:#0563C1\"><b><u>Full P0602 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0603-internal-control-module-keep-alive-memory-kam-error\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0603<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0603-internal-control-module-keep-alive-memory-kam-error\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Keep-alive memory (KAM) error<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0603-internal-control-module-keep-alive-memory-kam-error\/\" style=\"color:#0563C1\"><b><u>Full P0603 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0604-internal-control-module-random-access-memory-ram-error\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0604<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0604-internal-control-module-random-access-memory-ram-error\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Internal RAM error<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0604-internal-control-module-random-access-memory-ram-error\/\" style=\"color:#0563C1\"><b><u>Full P0604 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p062f-internal-control-module-eeprom-error\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P062F<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p062f-internal-control-module-eeprom-error\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Internal EEPROM error<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p062f-internal-control-module-eeprom-error\/\" style=\"color:#0563C1\"><b><u>Full P062F guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p1621-control-module-long-term-memory-performance\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P1621<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p1621-control-module-long-term-memory-performance\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Control module long-term memory performance<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p1621-control-module-long-term-memory-performance\/\" style=\"color:#0563C1\"><b><u>Full P1621 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Factory Service Bulletins Worth Knowing<\/h2>\n<p>Factory service bulletin #PIP4653D addresses diagnostic trouble codes P0601, P0603, P0604, P062F, or P1621 stored in the transmission control module (TCM) of the 2011 GMC Yukon XL. These codes may point to internal PCM faults that require further diagnosis. Following the bulletin\u2019s guidelines can help technicians determine whether the module needs replacement or if other issues are contributing to the problem.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:18px 0;font-size:15px\">\n<tr>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Bulletin<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Subject<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">What It Addresses<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">&mdash;<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">DTC&amp;#8217;s P0601 P0603 P0604 P062F Or P1621 (Stored in the TCM) &#8211; (Jun 20, 2012)<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">&mdash;<\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Protecting the PCM in Your 2011 GMC Yukon XL<\/h2>\n<ul style=\"margin:14px 0 6px 0;padding-left:26px\">\n<li style=\"margin:10px 0;line-height:1.65\">Maintain a healthy charging system to prevent voltage spikes that may damage the PCM<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Ensure all electrical connectors and grounds are clean and securely fastened<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Avoid jump-starting with improper voltage to reduce the risk of module damage<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Address diagnostic trouble codes promptly to prevent cascading failures<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Keep the PCM connector seals intact to protect against moisture and corrosion<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Use only factory-approved add-on electrical equipment to avoid system interference<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<h2>Frequently Asked Questions<\/h2>\n<h3>How do I know if my 2011 GMC Yukon XL PCM is failing?<\/h3>\n<p>Common signs include stalling, no-start conditions, or diagnostic trouble codes related to internal module faults. Rough idling, poor acceleration, or transmission shifting issues may also indicate PCM problems. A scan tool can help confirm whether the module is the source of the issue.<\/p>\n<h3>What\u2019s involved in replacing the PCM on a 2011 GMC Yukon XL?<\/h3>\n<p>Replacement typically requires 1.4 hours of labor for removal and installation. Afterward, a 0.5-hour relearn procedure is often needed to synchronize the new module with the vehicle\u2019s systems. Proper programming is also essential to ensure correct operation.<\/p>\n<h3>Can I install a used PCM in my 2011 GMC Yukon XL?<\/h3>\n<p>While possible, used modules may require reprogramming to match your vehicle\u2019s VIN and calibration. A new or remanufactured unit with pre-loaded software can simplify the process and reduce the risk of compatibility issues.<\/p>\n<\/div>\n<div class=\"info-section\">\n<p>If your 2011 GMC Yukon XL is experiencing PCM-related issues, you have options for repair or replacement. A new or remanufactured module can restore reliable operation, especially when pre-programmed to your vehicle\u2019s specifications. Understanding labor times and factory requirements helps you make an informed choice between a dealer visit or a direct replacement solution.<\/p>\n<figure style=\"margin:22px auto;text-align:center;max-width:720px\"><img decoding=\"async\" style=\"max-width:100%;height:auto;border:1px solid #e2e6ec;border-radius:8px\" src=\"https:\/\/www.fs1inc.com\/media\/wysiwyg\/googleshop\/gmtypeE38\/gm-pcm-typeE38-large1.jpg\" alt=\"Refurbished VIN-programmed PCM for the 2011 GMC Yukon XL\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">A refurbished, VIN-programmed replacement PCM for the 2011 GMC Yukon XL from Flagship One.<\/figcaption><\/figure>\n<p>Flagship One stocks a <a href=\"https:\/\/www.fs1inc.com\/2011-gmc-yukon-xl-1500-5-3l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\"><b>refurbished, VIN-programmed PCM for the 2011 GMC Yukon XL<\/b><\/a> with a lifetime warranty, free shipping and no core charge. The full <a href=\"https:\/\/www.fs1inc.com\/gm\/gmc-pcm-ecm-ecu-engine-computer\/yukon-xl-engine-computers.html\">GMC Yukon XL module lineup<\/a> covers other engine configurations as well.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Final Thoughts<\/h2>\n<p>The 2011 GMC Yukon XL relies on its PCM for smooth engine and transmission performance. If you\u2019re dealing with stalling, no-start conditions, or internal module codes, a replacement may be necessary. Proper installation and programming ensure your vehicle runs as intended, so choosing the right solution is key to long-term reliability.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>2011 GMC Yukon XL with stalling, no-start, or internal control module codes may need a PCM\/ECM replacement. Learn symptoms, labor times, and factory programming requirements to restore reliable operation.<\/p>\n","protected":false},"author":1,"featured_media":520361,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[258,270],"tags":[368,68,1444],"class_list":["post-530401","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-car","category-gmc","tag-368","tag-gmc","tag-yukon-xl"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2011 GMC Yukon XL PCM\/ECM Replacement and Common Failure Signs - Flagship One Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.fs1inc.com\/blog\/2011-gmc-yukon-xl-pcm-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2011 GMC Yukon XL PCM\/ECM Replacement and Common Failure Signs - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"2011 GMC Yukon XL with stalling, no-start, or internal control module codes may need a PCM\/ECM replacement. 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