2017 1500 High Country - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Prong · 03-30-2018, 05:08 PM

If you have the 8 speed trans, there's a programming update for that to reduce the bang shifts. I believe the tsb# is 16-na-411. I had it done to my 15 and it corrected 98% of the troubles.

**Hart_Rod** · 04-04-2018, 03:47 PM

Quote:

Originally Posted by Prong

If you have the 8 speed trans, there's a programming update for that to reduce the bang shifts. I believe the tsb# is 16-na-411. I had it done to my 15 and it corrected 98% of the troubles.

Is that for all years?

03-30-2018, 05:08 PM	#1
Prong Registered User Join Date: May 2007 Location: CO Posts: 474	Re: 2017 1500 High Country If you have the 8 speed trans, there's a programming update for that to reduce the bang shifts. I believe the tsb# is 16-na-411. I had it done to my 15 and it corrected 98% of the troubles.



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