{"id":524576,"date":"2026-07-16T02:30:32","date_gmt":"2026-07-16T06:30:32","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/?p=524576"},"modified":"2026-07-19T11:23:41","modified_gmt":"2026-07-19T15:23:41","slug":"2012-chevrolet-avalanche-pcm-replacement-guide","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/2012-chevrolet-avalanche-pcm-replacement-guide\/","title":{"rendered":"2012 Chevrolet Avalanche ECM Replacement &#038; Common Failure Signs"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">PCM<\/div>\n<h1>2012 Chevrolet Avalanche ECM Replacement &amp; Common Failure Signs<\/h1>\n<p class=\"hero-subtitle\">The Engine Control Module (ECM) in your 2012 Chevrolet Avalanche manages fuel delivery, ignition timing, and emissions systems. Failures may cause drivability issues, poor performance, or stored trouble codes.<\/p>\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>The ECM controls critical engine functions in the 2012 Chevrolet Avalanche.<\/li>\n<li>Replacement typically requires 1.4 hours of labor plus a 0.5-hour relearn procedure.<\/li>\n<li>Factory cautions advise connecting add-on equipment directly to the battery to prevent damage.<\/li>\n<li>Common failure symptoms include stalling, no-start conditions, and module-specific trouble codes.<\/li>\n<li>Flagship One units arrive VIN-programmed, eliminating the need for post-install programming.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<p>If your 2012 Chevrolet Avalanche is experiencing rough idling, stalling, or a no-start condition, the Engine Control Module (ECM) may be the culprit. This component acts as the brain of your vehicle\u2019s engine, regulating fuel injection, ignition timing, and emissions systems. When it fails, symptoms can range from subtle performance issues to complete engine shutdown. Understanding the role of the ECM, its location, and the steps involved in replacement can help you make informed decisions about repairs. This guide covers what the ECM does, how to identify failures, and what to expect during replacement\u2014including factory procedures and labor times.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What the PCM Does in a 2012 Chevrolet Avalanche<\/h2>\n<p>In the 2012 Chevrolet Avalanche, the Engine Control Module (ECM) is responsible for managing the engine\u2019s air-fuel mixture, ignition timing, and emissions controls. It continuously monitors sensor inputs to optimize performance and efficiency. A faulty ECM may disrupt these functions, leading to poor drivability or stored trouble codes. If replacement becomes necessary, you\u2019ll need <a href=\"https:\/\/www.fs1inc.com\/gm\/chevrolet-pcm-ecm-ecu-engine-computer\/avalanche-engine-computers.html\">replacement engine computers for the Avalanche<\/a> that match the vehicle\u2019s specifications. The module\u2019s role is critical, as it ensures the engine operates within factory parameters for power, fuel economy, and emissions compliance.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Where the PCM Is Located and What Replacement Involves<\/h2>\n<p>The ECM in your 2012 Chevrolet Avalanche is typically located in the engine bay, though access may require removing other components. Replacing the module involves disconnecting the battery, unplugging electrical connectors, and removing mounting bolts. Labor time for removal and reinstallation is estimated at 1.4 hours. After installation, a 0.5-hour relearn procedure is required to synchronize the ECM with the vehicle\u2019s systems. Always capture ECM data with a scan tool before removal to preserve vehicle-specific settings. Proper torque on mounting bolts and secure connector seating are essential to avoid future issues.<\/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\/2012-chevrolet-avalanche-pcm-location-diagram.webp\" alt=\"2012 Chevrolet Avalanche PCM location diagram\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">PCM mounting location on the 2012 Chevrolet Avalanche.<\/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 2012 Chevrolet Avalanche<\/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 battery and battery tray.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> the under hood electrical center.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> the ECM from the bracket.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Position<\/b> the engine wiring harness electrical connectors and engage the retainers.<\/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\">Engine Control Module R&amp;R<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">All configurations<\/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\">Engine Control Module Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">All configurations<\/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 R&amp;R<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">All configurations<\/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\">All configurations<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.5 hr<\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Programming Requirements After Replacement<\/h2>\n<p>After replacing the ECM in your 2012 Chevrolet Avalanche, the factory procedure requires reprogramming the module with the correct calibration and vehicle-specific data. This process involves using specialized equipment to ensure the ECM communicates properly with the engine and transmission systems. However, <a href=\"https:\/\/www.fs1inc.com\/2012-chevrolet-avalanche-1500-5-3l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\">a VIN-programmed replacement unit<\/a> arrives pre-configured, eliminating the need for post-install programming. This saves time and reduces the risk of errors during the setup process. Always follow factory guidelines to avoid compatibility issues or drivability concerns.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Symptoms of a Failing PCM<\/h2>\n<p>A failing ECM in your 2012 Chevrolet Avalanche may cause a range of symptoms, including intermittent stalling, rough idling, or a no-start condition. You might also notice poor acceleration, reduced fuel efficiency, or the check engine light illuminating. Common trouble codes associated with ECM failures include <a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\">internal control module memory checksum error<\/a>, which indicates a potential issue with the module\u2019s memory or processing. Other codes like P0603 or P0604 may point to similar internal faults. If your scan tool fails to communicate with the ECM, the module itself may be unresponsive, requiring replacement.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Module Trouble Codes on the 2012 Chevrolet Avalanche<\/h2>\n<p>The 2012 Chevrolet Avalanche may store specific trouble codes when the ECM experiences internal faults. These codes help diagnose issues related to the module\u2019s memory, processing, or communication with other systems.<\/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-p0606-control-module-processor\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0606<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0606-control-module-processor\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Module processor failure<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0606-control-module-processor\/\" style=\"color:#0563C1\"><b><u>Full P0606 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><b>P060B<\/b><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Module-internal fault<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">&mdash;<\/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 bulletins for the 2012 Chevrolet Avalanche address ECM-related concerns. Bulletin #PIP4954A outlines part restrictions for the E78 ECM with part number 12643636. Another bulletin, #PIP4653D, covers trouble codes P0601, P0603, P0604, P062F, or P1621 stored in the Transmission Control Module (TCM), which may be linked to ECM issues. These bulletins provide guidance for diagnosing and resolving module-related faults to restore proper vehicle operation.<\/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\">PQC Part Restriction &#8211; E78 ECM Part Number 12643636 &#8211; (Jul 20, 2012)<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">&mdash;<\/td>\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 2012 Chevrolet Avalanche<\/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 ECM.<\/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 the vehicle with improper voltage, which can harm sensitive electronics.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Address trouble codes promptly to prevent cascading failures in related systems.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Keep the ECM connector seals intact to protect against moisture and corrosion.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Use a quality battery charger when storing the vehicle for extended periods.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<h2>Frequently Asked Questions<\/h2>\n<h3>How do I know if my 2012 Chevrolet Avalanche ECM is failing?<\/h3>\n<p>Common signs include stalling, rough idling, or a no-start condition. You may also see the check engine light with module-specific trouble codes like P0601 or P0603. If the scan tool fails to communicate with the ECM, the module may need replacement.<\/p>\n<h3>What is the labor time for replacing the ECM in my 2012 Chevrolet Avalanche?<\/h3>\n<p>Replacing the ECM typically requires 1.4 hours of labor, plus an additional 0.5 hours for the relearn procedure. Always capture ECM data with a scan tool before removal to preserve vehicle settings.<\/p>\n<h3>Can I install an aftermarket ECM in my 2012 Chevrolet Avalanche?<\/h3>\n<p>While aftermarket options exist, factory procedures recommend using a VIN-programmed replacement unit to ensure compatibility. Specialized equipment is required for reprogramming, so pre-programmed units simplify the process.<\/p>\n<\/div>\n<div class=\"info-section\">\n<p>If your 2012 Chevrolet Avalanche is exhibiting ECM-related symptoms, you have options for repair or replacement. While some shops may attempt to reflash or repair the existing module, a VIN-programmed replacement unit ensures a reliable solution without the need for post-install programming. Consider the labor costs and potential downtime when deciding between repair and replacement.<\/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 2012 Chevrolet Avalanche\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">A refurbished, VIN-programmed replacement PCM for the 2012 Chevrolet Avalanche from Flagship One.<\/figcaption><\/figure>\n<p>Flagship One stocks a <a href=\"https:\/\/www.fs1inc.com\/2012-chevrolet-avalanche-1500-5-3l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\"><b>refurbished, VIN-programmed PCM for the 2012 Chevrolet Avalanche<\/b><\/a> with a lifetime warranty, free shipping and no core charge. The full <a href=\"https:\/\/www.fs1inc.com\/gm\/chevrolet-pcm-ecm-ecu-engine-computer\/avalanche-engine-computers.html\">Chevrolet Avalanche 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 ECM in your 2012 Chevrolet Avalanche plays a critical role in engine performance and drivability. Recognizing failure symptoms early and understanding the replacement process can help you avoid costly repairs. Whether you opt for a refurbished unit or a new replacement, ensuring proper installation and programming will restore your vehicle\u2019s reliability.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>2012 Chevrolet Avalanche with stalling, no-start, or PCM trouble codes may need an ECM replacement. Learn symptoms, labor time, and factory cautions to avoid damage.<\/p>\n","protected":false},"author":1,"featured_media":520105,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[258,274],"tags":[327,742,67],"class_list":["post-524576","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-car","category-chevrolet","tag-327","tag-avalanche","tag-chevrolet"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2012 Chevrolet Avalanche ECM Replacement &amp; 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\/2012-chevrolet-avalanche-pcm-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2012 Chevrolet Avalanche ECM Replacement &amp; Common Failure Signs - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"2012 Chevrolet Avalanche with stalling, no-start, or PCM trouble codes may need an ECM replacement. 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