Service 4wd message?

[krellheat]

 

 

PS: Fat fingers on an Iphone 3GS result in many typos.

[Jsdirt]

......

BTW I have had the truck exactly one month purchased with 120 miles on it.

Makes you wonder whether or not GM understands the concept of QUALITY CONTROL ....

 

Are ANY of these trucks tested before they're rolled off the assembly line?? Apparently not!

 

Mine had 40-something miles on it when I took it for a test drive. Brakes were pulsating!! That tells me mine wasn't even LOOKED at ...

[krellheat]

Received a call from the dealer and was told that the transfer case module is defective. He explained that the 4wd service codes is occurung because the mudule is not storing the gear position. The module part is on order and should have tomorrow. Maybe.

[MattUofM]

so I ran into this last week. my truck has only 2700mi on it. took it to our techs at my dealer and found out some good stuff.

 

There is a problem with the 4wd-auto mode on all of our trucks. Basically, don't ever park and turn your truck off with it still in 4wd-auto. leave it in 2wd or 4wd. I forgot what he said is the issue in there, but the problem is being reviewed by GM engineering and has been for a little while. There isn't a "fix" yet but ther should be one before spring i was told. I'll let you guys know if i hear anything.

[TokeyTheTiger]

New here. Saw the topic wanted to chime in..we bought a 2014 Silverado 1500 LTZ on the 30th of Dec 2014 as I was test driving saw the Service 4x4 signal I dismissed as I didn't know what it was. Had 26 miles when we bought it. Drove it another 10 miles took it back as besides that it would shift into 4 hi or low or auto. Took it back find it. 370+ miles so far so good. Keep fingers crossed, knocked on wood, poked the voodoo doll..lol jk.....maybe lol and all the good ju ju lol

[sabre364]

so I ran into this last week. my truck has only 2700mi on it. took it to our techs at my dealer and found out some good stuff.

 

There is a problem with the 4wd-auto mode on all of our trucks. Basically, don't ever park and turn your truck off with it still in 4wd-auto. leave it in 2wd or 4wd. I forgot what he said is the issue in there, but the problem is being reviewed by GM engineering and has been for a little while. There isn't a "fix" yet but ther should be one before spring i was told. I'll let you guys know if i hear anything.

If you find out if there is a fix please let us know. the auto 4wd is one of the major factors in my next vehicle and gm has had it for ages, there is not reason you should have to put it on 2hi or 4hi to turn it off. In many parts of the country you leave auto 4wd on almost all winter...I don't want to have to look at a ford lariat (the xlt doesn't have this option) just because gm has some idiotic software glitches.

[Jsdirt]

On my truck, if you change the setting with the key off, it will still be in the setting it was at upon key-off when you re-start. You then have to turn the dial back to that setting, then try to go to the one you want. Takes a few tries sometimes.

 

Auto 4x4 is a great idea, since most backroads will be covered in snow around here, but the main roads will be clear, then some roads a little of both. In that case it's nice having the auto feature, but I sure could do without the electronic aspect of it. I'd go back to a stick-shift transfer case in a heartbeat, just for reliability.

 

What good are all these bells and whistles that constantly FAIL?

 

I know what works, and what doesn't. Wish GM did ....

[krellheat]

So the replacement part came inan truck was to be picked up today. But nope. A new one has to be ordered to replace the replacement part. Don't know when now I will have my truck back.

[redwngr]

so I ran into this last week. my truck has only 2700mi on it. took it to our techs at my dealer and found out some good stuff.

 

There is a problem with the 4wd-auto mode on all of our trucks. Basically, don't ever park and turn your truck off with it still in 4wd-auto. leave it in 2wd or 4wd. I forgot what he said is the issue in there, but the problem is being reviewed by GM engineering and has been for a little while. There isn't a "fix" yet but ther should be one before spring i was told. I'll let you guys know if i hear anything.

I had to try it.

It behaved normally when parked overnight in 4 auto. It was still in 4 auto when restarted in the am. Switched it back to 2wd without problem.

 

Been driving 4wd gm's for 20 years, and this is the first one with the auto feature. I'm still not convinced I want to drive around with the (partially engaged) auto mode on all the time.

[krellheat]

I use AWD when snow is on road and throw it into 4WD when drivin conditions get squirrely.

[krellheat]

 

Past experience driving a suburban in New England.

[MattUofM]

I had to try it.

It behaved normally when parked overnight in 4 auto. It was still in 4 auto when restarted in the am. Switched it back to 2wd without problem.

 

Been driving 4wd gm's for 20 years, and this is the first one with the auto feature. I'm still not convinced I want to drive around with the (partially engaged) auto mode on all the time.

 

its not something that will go wrong immediately or over one night. ive used mine everyday for 2 months before it threw a code.

[krellheat]

Picked up truck during lunch. Apperantly it did not need a new transfer case module. The problem all along was one pin in the harness not making any connection. I can provide schematic references tonight after work to which pin and harnesx.

 

It feels slightly different in driving as its now not stuck in 4WD as it has since purchase.

[redwngr]

 

its not something that will go wrong immediately or over one night. ive used mine everyday for 2 months before it threw a code.

Was it cold when it happened?

[MattUofM]

Was it cold when it happened?

 

it was -10 out. the cold can cause issues/codes to pop up on some trucks. not extremely common but we do see it in our service dep from time to time.