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Jim Whitehead · 10-06-2013, 09:03 PM

Hi Bill
Disconnect the Battery and put the positive and negative terminals together for 10 minutes. This will drain and discharge the capacitors in the ECM and BCM. When you hook up the battery negative terminal first, the system will reinitialize the modules. This is a common problem with GM vehicles

10-06-2013, 09:03 PM	#2
Jim Whitehead Member Join Date: Mar 2003 Location: MA. Posts: 288 Likes: 153 Liked 150 Times in 41 Posts	Re: 1998 Chevy Express Battery drain Hi Bill Disconnect the Battery and put the positive and negative terminals together for 10 minutes. This will drain and discharge the capacitors in the ECM and BCM. When you hook up the battery negative terminal first, the system will reinitialize the modules. This is a common problem with GM vehicles