ECM and BCM updates

[gbieber05]

Anyone had these updates to their trucks? I had my oil changed today and they updated both modules. What ever was done to the ECM/tcm seems to have made my shifting a little strange.

[Stex]

^ what is strange to u?

[gbieber05]

Harder shifts that aren't welcomed.... Noticed on 1-2 shift and 2-3 shift.

[gmtech4]

it may have to relearn itself ,,,give it some time

[gbieber05]

Thanks! I'll give it a few days to iron out before I go postal!

[GMC-AT]

Keep us updated

[Silver space ship]

I have noticed the same thing after the AFM update. I talk about it under the AFM recall thread.

Edited October 23, 2013 by Silver Spaceship

[gbieber05]

Sorry silver spaceship my frustration got the better of me this time. I'll keep everyone posted though in the days to come. I also searched my vin# and came up with no recalls for mine but the dealer did I guess.

[svtkidd23]

Yeah mine was rough till i got on it hard 1 time passing someone.. Now its butter.

 

[Jsb55]

Harder shifts that aren't welcomed.... Noticed on 1-2 shift and 2-3 shift.

I had mine done also and feel the same thing. Did yours get better? Mine seems a little better but not like it used to be. My truck also goes into 4 cylinder mode more........

[Silver space ship]

My shifting is back to how it was before, my mileage dropped about 1.8 mpg but now, a tank 1/2 later it looks like its close to be back, fingers crossed. To me I don't feel the transition from 4 to 8 and vise versa isn't as smooth as before. Sometimes it will show v8,v4 and back to v8 all in a split second, never seen that before.

[Jsb55]

Good to hear that your shifting is back to where it was before. Mine jumps in and out of V4 and V8 A LOT more!! Kicks into V4 and lugs the truck into low rpms and then downshifts to get going again. Hopefully the tranny gets back to normal and gets rid of this.

[Cap'n Pete]

Aren't firm shifts a GOOD thing??

 

Just curious if you guys are expecting a soft shift that you don't even feel, or if it's gone from a nice, firm shift, to something that's simply way too harsh?

[Jsb55]

Cap'n Pete.. My '14 shifted smoothly when I got it.. After the update it would hit hard from 2nd to 3rd.. A very noticeable difference. After driving it for a few more days it is better as its only noticeable when the trans temp is still cold and goes away once it reaches about 100 degrees.

[mzodarg]

Yeah mine was rough till i got on it hard 1 time passing someone.. Now its butter.

I had this done yesterday. BCM was already updated, just had the AFM updated. I had read this thread prior to taking it in and when the truck was complete, I took it on the Interstate immediately. 1/4 Mile on ramp, I got on her pretty good, once on the highway, I did a few pedal to the floor blasts and all is well.

 

Mike