Tips to change TCM
Thread Starter
Safety Car
Joined: Nov 1999
Posts: 4,285
Likes: 83
From: S.E. WI.
St. Jude Donor '08-'09-'10
Thread Starter
Safety Car
Joined: Nov 1999
Posts: 4,285
Likes: 83
From: S.E. WI.
St. Jude Donor '08-'09-'10
Thread Starter
Safety Car
Joined: Nov 1999
Posts: 4,285
Likes: 83
From: S.E. WI.
St. Jude Donor '08-'09-'10
Safety Car
Joined: Nov 2011
Posts: 3,713
Likes: 343
From: Norman OK
Sorry to burst your joy, HP Tuners cant handle this. The new TCM comes bare with no OS on it and the VIN has not been flashed either. So unless the place you are buying the TCM from is programming the TCM that idea wont work. Also if this is a 2017+ TCM it will need to be unlocked by HPT again before you can tune it.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Thread Starter
Safety Car
Joined: Nov 1999
Posts: 4,285
Likes: 83
From: S.E. WI.
St. Jude Donor '08-'09-'10
Did not know. Guess it adds another step to my repair. Good news is a friend is a Vet tech at local Chevy store.. Any idea/estimate on programming costs?
Thanks for update.
Thanks for update.
Thread Starter
Safety Car
Joined: Nov 1999
Posts: 4,285
Likes: 83
From: S.E. WI.
St. Jude Donor '08-'09-'10
Might be an idea Bryan. Right now my car is immobile/in my garage. As I understand it, now, TCM has to be in car to be programmed, I don't know or can TCM be programmed on a carry in basis?
Maybe see if HPTuner can program my "new" TCM or a buy a preprogrammed TCM from HP Tuner. Turning out to be a PITA based on what I didn't know..
Maybe see if HPTuner can program my "new" TCM or a buy a preprogrammed TCM from HP Tuner. Turning out to be a PITA based on what I didn't know..
Safety Car
Joined: Nov 2011
Posts: 3,713
Likes: 343
From: Norman OK
When you pull your TCM there will be a "Service Number" on the label of the TCM, make sure to take a picture of that label. Then you can see if HPT has that TCM in stock. If they do then yes you can order a unlocked and preprogrammed TCM from them. It comes with the OEM calibration on it, you will just have to license the new TCM (4 credits at $50 each) and then flash the new TCM with your TCM file that has your changes.
Thread Starter
Safety Car
Joined: Nov 1999
Posts: 4,285
Likes: 83
From: S.E. WI.
St. Jude Donor '08-'09-'10
Thanks for reply. So I need to buy a TCM from HPT. I have a ticket in for more info on options if I go through HPT.. Price seems to be $299-$399. I assume that is for the credits and ECM w/programming.
My car is a `15 so not sure why I would have to cough up $200 /4 credits. I'll contact them Monday. I have a new one coming Tuesday but if I can find a way to obtain a working TCM Monday, I am all in.. Looks like HPT is 1st choice depending on turn-around..
Thanks for info. Will see how call goes Monday..
My car is a `15 so not sure why I would have to cough up $200 /4 credits. I'll contact them Monday. I have a new one coming Tuesday but if I can find a way to obtain a working TCM Monday, I am all in.. Looks like HPT is 1st choice depending on turn-around..
Thanks for info. Will see how call goes Monday..
Thread Starter
Safety Car
Joined: Nov 1999
Posts: 4,285
Likes: 83
From: S.E. WI.
St. Jude Donor '08-'09-'10
So, bought a new jack, located TCM, pushed red lock clip forward, wiring harness not separating from harness.. Does harness pull straight down from TCM? Just trying to be careful with harness and plug..
Update, got wiring harness released, cannot remove TCM from bracket. Video for c7 shows installer pushing up release on bracket release. I can push up on release but tcm will slide out.. Anyone see me missing anything?
I found one video of TCM R&R. Literally a b4 and after video.. Not much value,
Update, got wiring harness released, cannot remove TCM from bracket. Video for c7 shows installer pushing up release on bracket release. I can push up on release but tcm will slide out.. Anyone see me missing anything?
I found one video of TCM R&R. Literally a b4 and after video.. Not much value,
Last edited by Chalky; Aug 21, 2022 at 06:37 PM.
Thread Starter
Safety Car
Joined: Nov 1999
Posts: 4,285
Likes: 83
From: S.E. WI.
St. Jude Donor '08-'09-'10
Thread Starter
Safety Car
Joined: Nov 1999
Posts: 4,285
Likes: 83
From: S.E. WI.
St. Jude Donor '08-'09-'10
Also found out that 2015/2016 cannot be bench programmed. TCM has to be installed in car to program.. Got new TCM installed. Now trying to find a dealer to tow vehicle to to get programmed.
Thread Starter
Safety Car
Joined: Nov 1999
Posts: 4,285
Likes: 83
From: S.E. WI.
St. Jude Donor '08-'09-'10