{"id":524636,"date":"2026-07-16T02:32:55","date_gmt":"2026-07-16T06:32:55","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/?p=524636"},"modified":"2026-07-19T11:26:03","modified_gmt":"2026-07-19T15:26:03","slug":"2013-chevrolet-tahoe-pcm-replacement-guide","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/2013-chevrolet-tahoe-pcm-replacement-guide\/","title":{"rendered":"2013 Chevrolet Tahoe PCM\/ECM Replacement: What You Need to Know"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">PCM<\/div>\n<h1>2013 Chevrolet Tahoe PCM\/ECM Replacement: What You Need to Know<\/h1>\n<p class=\"hero-subtitle\">The powertrain control module (PCM) or engine control module (ECM) in your 2013 Chevrolet Tahoe manages fuel, ignition, and transmission operation. Internal faults like P0601, P0602, or P0606 indicate module failure. Corrosion at connectors, as described in bulletin 09-06-03-004E, can cause intermittent no-start or communication loss.<\/p>\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>Replacement of the PCM or ECM on a 2013 Tahoe takes 1.4 hours for R&amp;R plus 0.5 hours for relearn.<\/li>\n<li>Before removing the ECM, use a scan tool to capture data.<\/li>\n<li>Special equipment and correct calibration are required for reprogramming.<\/li>\n<li>Bulletin 09-06-03-004E addresses fretting corrosion at connectors.<\/li>\n<li>Module-internal trouble codes include P0601, P0602, P0603, P0604, P0606, P060B, P062F, P1621.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<p>If your 2013 Chevrolet Tahoe is experiencing intermittent no-start, warning lights, or communication loss, the PCM or ECM may be at fault. This module controls engine and transmission functions, and failure can stem from internal faults or connector corrosion. The factory cautions that any add-on electrical equipment must be connected directly to the battery to prevent damage. Before removing the ECM, you should capture its data with a scan tool. Reprogramming requires special equipment and the correct calibration. This guide explains symptoms, replacement steps, and how a pre-programmed unit can simplify the process.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What the PCM Does in a 2013 Chevrolet Tahoe<\/h2>\n<p>The powertrain control module (PCM) in your 2013 Chevrolet Tahoe acts as the central computer for engine and transmission management. It processes sensor inputs to control fuel delivery, ignition timing, and shift points. When the module fails internally, it may set codes like P0601 or P0606. Corrosion at the connector pins, as noted in bulletin 09-06-03-004E, can also cause intermittent issues. If you need a new unit, consider <a href=\"https:\/\/www.fs1inc.com\/gm\/chevrolet-pcm-ecm-ecu-engine-computer\/tahoe-engine-computers.html\">replacement engine computers for the Tahoe<\/a> that come pre-programmed to your vehicle&#8217;s VIN, avoiding the need for dealer reprogramming.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Where the PCM Is Located and What Replacement Involves<\/h2>\n<p>The PCM\/ECM on a 2013 Chevrolet Tahoe is typically located in the engine compartment, often near the battery or on the firewall. Replacement involves disconnecting the battery, removing the electrical connectors, and unbolting the module. The factory book time for removal and installation is 1.4 hours. After installation, a relearn procedure takes 0.5 hours, or a reset takes 0.3 hours. The factory also advises connecting any add-on electrical equipment directly to the battery to prevent module damage.<\/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\/2013-chevrolet-tahoe-pcm-location-diagram.webp\" alt=\"2013 Chevrolet Tahoe PCM location diagram\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">PCM mounting location on the 2013 Chevrolet Tahoe.<\/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 2013 Chevrolet Tahoe<\/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\">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<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\">Engine Control Module Reset<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">All configurations<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.3 hr<\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Programming Requirements After Replacement<\/h2>\n<p>Factory procedure requires that before removing the ECM, you use a scan tool to capture the module&#8217;s data. Reprogramming the new module demands special equipment and the correct program and calibration for your vehicle. Instead of performing these steps yourself, you can order <a href=\"https:\/\/www.fs1inc.com\/2013-chevrolet-tahoe-5-3l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\">a VIN-programmed replacement unit<\/a> that arrives ready to install, with all necessary programming already completed.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Symptoms of a Failing PCM<\/h2>\n<p>A failing PCM or ECM in your 2013 Chevrolet Tahoe may cause intermittent no-start, stalling, or rough running. You might see the malfunction indicator lamp (MIL) or other warning lights. Scan tool communication may be lost, and transmission shifting can become erratic. One common internal fault is <a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\">internal control module fault P0601<\/a>, which indicates a memory or processor issue. Other codes like P0602, P0603, or P0606 point to similar internal failures.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Module Trouble Codes on the 2013 Chevrolet Tahoe<\/h2>\n<p>The following trouble codes are stored within the module itself and indicate internal hardware or software faults. They are not related to external sensors or circuits. These codes require module replacement or reprogramming.<\/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>Service bulletin #09-06-03-004E addresses intermittent no-crank\/no-start, MIL illumination, warning messages, and DTCs set by various control modules. The condition may be intermittent and difficult to duplicate. The cause is fretting corrosion at the connector terminals. The repair involves disconnecting the affected connector and applying dielectric lubricant to the terminals. This bulletin applies to the 2013 Chevrolet Tahoe and other GM vehicles.<\/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\"><b>09-06-03-004<\/b><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Intermittent No Crank\/No Start, No Module Communication, MIL, Warning Lights, Vehicle Messages <\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Some customers may comment on any of the following conditions: An intermittent no crank\/no start Intermittent malfunction indicator lamp (MIL) illumination\u2026<\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Protecting the PCM in Your 2013 Chevrolet Tahoe<\/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; voltage spikes can damage the module.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Keep battery and ground connections clean and tight.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Avoid jump-starting with a running vehicle; use a battery charger instead.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Address any module-related trouble codes promptly to prevent further damage.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Inspect connector seals for damage and ensure they are properly seated.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<h2>Frequently Asked Questions<\/h2>\n<h3>How do I know if my 2013 Tahoe&#8217;s ECM has an internal fault?<\/h3>\n<p>Look for module-internal codes like P0601 or P0606. These indicate the module itself is failing, not an external sensor. Intermittent no-start or warning lights that come and go are also common signs.<\/p>\n<h3>Can I replace the ECM on my 2013 Tahoe myself?<\/h3>\n<p>Yes, the book time for R&amp;R is 1.4 hours. However, you must capture ECM data with a scan tool before removal, and reprogramming requires special equipment. A pre-programmed unit eliminates that step.<\/p>\n<h3>What is the fretting corrosion bulletin for the 2013 Tahoe?<\/h3>\n<p>Bulletin 09-06-03-004E describes intermittent no-start and warning lights caused by corrosion at module connectors. The fix is to disconnect the connector and apply dielectric lubricant.<\/p>\n<\/div>\n<div class=\"info-section\">\n<p>For your 2013 Chevrolet Tahoe, a failed PCM or ECM can be replaced with a refurbished or new unit. Repairing the original module is rarely cost-effective. A VIN-programmed replacement from Flagship One arrives ready to install, saving you the time and expense of dealer reprogramming.<\/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 2013 Chevrolet Tahoe\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">A refurbished, VIN-programmed replacement PCM for the 2013 Chevrolet Tahoe from Flagship One.<\/figcaption><\/figure>\n<p>Flagship One stocks a <a href=\"https:\/\/www.fs1inc.com\/2013-chevrolet-tahoe-5-3l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\"><b>refurbished, VIN-programmed PCM for the 2013 Chevrolet Tahoe<\/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\/tahoe-engine-computers.html\">Chevrolet Tahoe module lineup<\/a> covers other engine configurations as well.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Final Thoughts<\/h2>\n<p>A failing PCM or ECM in your 2013 Chevrolet Tahoe can cause frustrating intermittent issues. Replacing the module with a pre-programmed unit from Flagship One ensures a straightforward installation without the need for special reprogramming equipment. Get your Tahoe back on the road reliably.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Learn about PCM\/ECM failure symptoms for your 2013 Chevrolet Tahoe, including no-start and warning lights. Factory caution on add-on electrical equipment. Get VIN-programmed replacement.<\/p>\n","protected":false},"author":1,"featured_media":520121,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[258,274],"tags":[307,67,461],"class_list":["post-524636","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-car","category-chevrolet","tag-307","tag-chevrolet","tag-tahoe"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2013 Chevrolet Tahoe PCM\/ECM Replacement: What You Need to Know - 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\/2013-chevrolet-tahoe-pcm-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2013 Chevrolet Tahoe PCM\/ECM Replacement: What You Need to Know - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"Learn about PCM\/ECM failure symptoms for your 2013 Chevrolet Tahoe, including no-start and warning lights. Factory caution on add-on electrical equipment. 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