4x4 cold update

burnerET · February 26, 2016

Went into dealer yesterday and had the oil changed. I was notified of the update for the issue of the 4x4 not engaging when cold or something along those lines....My question is, I had my 15 denali tuned by Black Bear. Will this being done at the dealer effect my tune in any way? I haven't had any issues with the 4x4, that I know of. I don't however want to have anything effect my spectacular Black Bear tune...

hurricanoday · February 26, 2016

Will the dealer even work on your truck with a tune? What is the tsb/recall number?

Dirtbiker · February 26, 2016

The update is a programming issue. To fix it, they reprogram some part of the system. I do not know if it will affect a tune though. I know I had a Diablo program in my 2006 3/4 ton and took it in for a tune up. They updated my computer and it screwed up the truck. My transmission started shifting crazy and I lost my tune from Diablo.

hollywoodsle · February 26, 2016

unless black bear tuned your transfer case control module it won't mess anything up

obrien19 · February 26, 2016

Had my Black bear tune in while they did this update. No issues at all.

Sent from my iPhone using Tapatalk

Doobs41378 · February 26, 2016

Here is a huge thread on that update. I believe they talk about tunes in it.

http://www.gm-trucks.com/forums/topic/177950-and-update-for-the-better-clunk-be-gone/page-1?hl=clunk

TJay74 · February 26, 2016

Go ahead and have it done, it wont do a thing to your BB tune. They are only reprogramming the TCCM (transfer case control module) which is separate from the ECM and TCM that BB tune.

burnerET · February 26, 2016

Thanks for the tips guy. I just wanted to make sure or get a general consensus. I emailed black bear yesterday but haven't heard back yet. I didn't buy the module when I had the tune done, so worst case I could just order and reschedule having it done.

On a side note...Ive also been noticing my truck when being cranked after being sitting for a while, seems really hard to turn over at times. It seems like it really takes a good 4-5 seconds before it cranks. Is this normal? My previous to silverados have never had this issue.

amxguy1970 · February 26, 2016

Does it get that cold in Houston to use 4wd?

Tyler

fondupot · February 26, 2016

Thanks for the tips guy. I just wanted to make sure or get a general consensus. I emailed black bear yesterday but haven't heard back yet. I didn't buy the module when I had the tune done, so worst case I could just order and reschedule having it done.

The update does not effect your ECM or TCM tunes. YOu will be fine. I like like having the AutoCal device so I can return to stock tuning very easily if need be. But you should be fine.

On a side note...Ive also been noticing my truck when being cranked after being sitting for a while, seems really hard to turn over at times. It seems like it really takes a good 4-5 seconds before it cranks. Is this normal? My previous to silverados have never had this issue.

This is a characteristic of Direct Injection. It helps if you prime the starter by turning the key to the start position. Just put your key in, and turn to the furthest position without actually cranking. You'll hear a "whirring" sound from under the truck. Once the "whirring" sound goes away. Crank over and it should fire up without issue.

Ryan698 · February 27, 2016

Here is a huge thread on that update. I believe they talk about tunes in it.

http://www.gm-trucks.com/forums/topic/177950-and-update-for-the-better-clunk-be-gone/page-1?hl=clunk

Hey I started that thread

Sent from my SM-G900W8 using Tapatalk

redwngr · February 28, 2016

On a side note...Ive also been noticing my truck when being cranked after being sitting for a while, seems really hard to turn over at times. It seems like it really takes a good 4-5 seconds before it cranks. Is this normal? My previous to silverados have never had this issue.

GM info on extended crank time for DI engines.

http://sandyblogs.com/techlink/?p=2971