1998 Chevy Express V8 Two Wheel Drive Automatic 187000 miles
Speedometer reads high at low speed and corrects at about 35 mph. Shifting is eratic then also corrects.
Is fine at high speed. Local chev dealer changed the Trans hall effect but did not clear problem.
Also the battery discharges if vehicle sits a couple of days. I measured the drain to be in excess of 500 MA, seems high to me. I think I may need anew ECM
as I beleive that supplies the speedometer and interacts with the Transmission. Looks like it is difficult to remove and replace.
Any help would be appreciated.
Regards Warren Reynolds
Friday, March 6th, 2009 AT 10:20 AM