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Showing results for tags 'calibration'.
I was looking at calibrations for my 2015 GMC Yukon Denali's ESCM (Z95) and noticed there's a listing but the calibration ID's are not sequential and the latest one it recommends is a lower numerical value than the one that may fix an issue I have. Is this normal? Any explanation for the ordering? I posted this in the K2XX forum but this one appears more appropriate so sorry for the spam. I believe I have the original calibration and think 23452750 may fix my issue. Does the "current"/top one include all the fixes in the below or are they all different and you pick the one that addresses your issue? I won't be applying this, likely taking to the dealer and just want to be informed.
Not sure where to put this, but thought it was a valid topic for anyone having a windshield replaced and has ADAS on their vehicle (Advanced Driver Assistance Systems); HUD, Lane Keep Assist, Lane Departure Warning, Forward Collision Warning, etc. While searching for more info, as well as justification to spend the extra $$ for the infamous Windshield Calibration that many reference, I found these videos that offer a good incite. What is ADAS? Tech Talk: ADAS (2016) Video showing the tools needed for the various ADAS Calibrations Example video of calibration for Lane Keep Assist (2018 accord) ADAS Camera Calibration - Toyota
First I'd like to say this is my first post, and thanks for all the great information here and sorry for the novel. I just purchased a 2003 Sub 2500 2wd 8.1L 4.10 rear ~132k miles with stock rims and tires (245/75/16) from a used car dealer, so I have no history info other than carfax. On my first test drive I noticed a very pronounced shift into each gear. It would hold a few hundred RPM more than I thought it should and when it shifted it was VERY firm. It was consistent and never any slipping, just firm. It made me think someone had an aftermarket tune with aggressive shift points/pressures. The dealer offered to have the local Chevy dealer check out the vehicle and they said there was no evidence of a tune but they did flash with the newest program. After the new program the truck shifted like a stock vehicle so I picked it up. While driving on the highway I had the cruise set at 78 mph, my normal cruising speed. I noticed that I was catching far more vehicles than normal, I downloaded a speedometer app on my phone and this verified that the speedo was off by 10%, if speedo says 70 I'm going 77. I have verified I have the 4.10 by checking RPM vs Speed and all checks out. Where does the speedometer calibration logic reside? PCM or BCM? When they loaded the new program did they only load one of those modules and not the other? With everything stock and presumably stock code I'm confused as to why my speed and mileage are off. If any of our wonderful techs on the site are in my area I wouldn't mind driving 30 miles or so to see you instead of my local dealership. I am in Murfreesboro TN. Again thanks for any help you can give. Jason