2014 Silverado Not Upshifting

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14csltz
Posts: 3
Joined: Thu Jul 24, 2014 3:18 pm

2014 Silverado Not Upshifting

Post by 14csltz »

I have a 2014 Chevy Silverado LTZ with the 5.3. I recently updated my Intune tuner and programmed my truck to Diablo tune with hard shift, trying to get close to my 2010 with a MaxEnergy. I installed this tune and my truck would not shift from 3rd to 4th until 35mph and 4th to 5th until 45mph. I uninstalled the firm shift, tried shift rpms lower and higher, and tried to adjust the shift pressure... nothing helped. I have now uninstalled everything and reinstalled the "Unchanged Diablo Tune" with AFM turned off. I am still having the same issue. If you are at 34MPH and let off the gas, the truck feels like the hill brake is on, if you hit 35MPH it shifts to 4th gear, however it will not shift to 5th until you hit 45MPH. Again, if you're in fourth at 44 mph and let off the gas it feels like a Jake Brake is on, even if I use the manual shift mode it still won't shift. Has anyone else had this issue? If so, can it be fixed?
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mikel
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Re: 2014 Silverado Not Upshifting

Post by mikel »

I have not heard of anything like this, is the tool updated/current?
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14csltz
Posts: 3
Joined: Thu Jul 24, 2014 3:18 pm

Re: 2014 Silverado Not Upshifting

Post by 14csltz »

Yes. I updated it about two weeks ago and installed this tune. Should I try updating again? After updating should I completely uninstall the tune back to factory and then re-install? Or???
Zach
Posts: 337
Joined: Wed Jun 13, 2012 3:43 am

Re: 2014 Silverado Not Upshifting

Post by Zach »

Will you please post everything from the tunes folder on your Intune? I'll have a look at it.
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14csltz
Posts: 3
Joined: Thu Jul 24, 2014 3:18 pm

Re: 2014 Silverado Not Upshifting

Post by 14csltz »

Here is everything in the tunes folder.
Attachments
TCM_24271132_LastTuneWritten.grg
(53.21 KiB) Downloaded 244 times
TCM_24271132_Backup.grg
(52.87 KiB) Downloaded 232 times
ECM_12659743_LastTuneWritten.grg
(111.52 KiB) Downloaded 223 times
ECM_12659743_Backup.grg
(110.92 KiB) Downloaded 243 times
Wilsonjared53
Posts: 1
Joined: Wed Apr 01, 2020 8:37 pm

Re: 2014 Silverado Not Upshifting

Post by Wilsonjared53 »

Having the exact same problem. Same truck 2014 5.3 ltz. Did you find a fix?
chevy5.31264025
Posts: 1
Joined: Sat Jul 25, 2020 1:58 pm

Re: 2014 Silverado Not Upshifting

Post by chevy5.31264025 »

how do u change the rev limiter. 2014 chevy silverado 5.3.
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