OEM 2001 GMC Yukon XL 1500 Engine Control Module

2001 GMC Yukon XL 1500 Engine Control Module Parts and Q&A

• Q: How to disconnect the powertrain control module or battery affect the learned idle position, and how can stable engine idle be restored for both automatic and manual transmissions in the Engine Control Module on 2001 GMC Yukon XL 1500?

  A: When the powertrain control module (PCM) or battery requires removal or the pcm needs reprogramming then the saved engine idle position is cleared thus leading to unstable engine control. Automatic transmission maintenance begins with switching off the ignition and reconnecting the pcm battery power while you switch off a/c controls. The first step should be to engage the parking brake and use blocking materials while the engine starts. The transmission should be in drive position and engine coolant temperature at 80°c (176°F) while letting the engine run for five minutes without movement. The transmission should be shifted into park then the engine must idle for another 5 minutes until the engine is finally powered off for 30 seconds. Starting with manual transmission requires ignition off services followed by pcm battery feed reconnection alongside switching the a/c controls to their off position. Start the engine while the transmission stays in neutral position after setting the parking brake and wheel blocking. Allow the engine to reach a coolant temperature exceeding 80 degrees celsius before leaving it to idle for 5 minutes then turn off the engine for another 30 seconds.