byrdman11
January 31st, 2014, 01:58 PM
First I'm new at this tuning stuff. I have a 2011 silverado with e38 ECM and I install a 4l80 with a gm tmc
I put shorter tires and speedo is fast by 5 mph at 60 . I put tire size in both TCM and ECM and tire pulse per mile but no change in speedo. please help what can I change to fix this.
I put shorter tires and speedo is fast by 5 mph at 60 . I put tire size in both TCM and ECM and tire pulse per mile but no change in speedo. please help what can I change to fix this.