OEM 2005 Chevrolet Express 2500 Engine Control Module

2005 Chevrolet Express 2500 Parts Questions & Experts Answers

• Q: How to service the Engine Control Module (ECM) on 2005 Chevrolet Express 2500?

  A: The repair process for the powertrain control module (PCM) consists of pcm replacement or eeprom electrically erasable programmable read-only memory programming. A correct part check should be performed on the pcm before carrying out the replacement. The new service pcm must replace the faulty unit after confirming its replacement is necessary. Keep the ignition off before touching pcm connectors and disconnecting or reconnecting power because it will protect the internal components from harm. Before connecting the pcm remove all dust from its connectors so the gaskets must be checked to confirm proper installation which must also block contaminants from entering the system. Programming of a new pcm remains necessary before use. Document the current engine oil life because programming failure will set the default to 100 percent leading to an oil change at 5000 km (3,000 mi) after the previous change. A scan tool helps you obtain the measurement of engine oil life before you remove the negative Battery Cable and pcm harness connectors and keep away from connector pins and soldered components to stop electrostatic discharge (ESD) damage. To remove the pcm lift the spring latch first then extract it from the mounting tray after raising it from the engine compartment. After mounting the video in its tray use the spring latch followed by connecting all pcm connectors before finally tightening the fasteners to 8 n.m (71 lb in). After reconnecting the negative Battery Cable users must program the pcm if they installed a new one.