New 2016 Stuck in 4WD, help!

[COP TZR]

okey dokey, here we go....opened door, dash light up with "Service 4wd", started engine, backed up 10ft, front diff is stuck in full lock, will keep you posted.

 

Update 1:

(1/2hr quick check in driveway)

Disconnected the negative battery terminal for 10 minutes, removed "4wd trac" fuse, reconnected battery, heard actuator noise, reinstalled fuse, heard actuator noise. Sounded as though the actuator had steady power and removing the fuse turned it off. Checked around top and bottom but was now dark and lots of skid plate underneath.

 

Update 2: 

(Took truck to dealer)

Check and advise for service AWD message - vehicle stuck in 4 low.

- Tech cause: scan for codes c0398 in transfer case control module

- Tech comments: check for software updates and cancel codes, check range sensor for corrosion, range sensor has crack and is swollen

Added operation: transfer case range sensor corroded diag and replace range sensor and set up

Tech cause: transfer case range sensor shorted - Tech comments: replace transfer case range sensor and relearn to tccm . as per est.

1.00 - 84377721 - Sensor $194.08 (CDN$)

- Tech cause: transfer case range sensor shorted

- Tech comments: replace transfer case range sensor and relearn to tccm . as per est.

Labour $193.50 (CDN$)

Environmental charge $5.00 (CDN$)

HST $51.04 (CDN$ - Ontario)

Total $443.62 (CDN$)

Edited July 6, 2019 by COP TZR

[lsquir]

On 7/23/2017 at 5:20 PM, redwngr said:

I didn't read the rest of the thread, but take it in.

 

There is a recall.

 

Just had mine done.

 

Dealer advised of recall, I did not get paperwork from GM.

^^ This ^^

 

If you have a 2016 .... there is a recall. Check NHTSA - even if you have gone beyond the 36k Limited Warranty, they were suppsed to "take the steps necessary to be sure the service update correction has been made before..... releasing the vehicle [no matter what service the vehicle was at the dealership for]" during the Limted Warranty.

 

For example, my 2016 GMC Yukon SLT (with "Performance Package Enhanced Towing" RPO = NHT) did not register during my service visits to the dealership(s) while under "New Vehicle Limited Warranty" because the RPO for recalled vehicles did not include the RPO for "Performance Package Enhanced Towing" (or, RPO = NHT); however, my vehicle (see your glove box for RPOs) has an RPO under the recall (i.e. NQH).    

 

Service Update: "28770 4WD IPS Drift DTC C0398 - 4HI Lock-Up"

Reference Number: N152028770

 

I do NOT know if this recall was issued for other years. But, info needs to be more readily diseminated - and may, given the potential for issues with the 4WD Lock-up or stuck in 4 wheel drive issue in muliple years, need to be disseminated to owners from various years in order to initiate appropriate service or recall efforts.     

 

Edited March 9, 2021 by lsquir
corrected spelling