HELP! 2007 chevy silverado randomly engage 4x4 while dr


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

Engine blew up after oil change, is mechanic responsible?

Hello, I have a 2007 Hyundai Elantra wit...

Changed pads and now brake pedel goes to the floor

I am not much of a mechanic, and needed ...

Equinox air conditioning issue, help please!

I have a 2020 Chevrolet Equinox that has...

2005 Maxima overheats only when idling but engine temp comes down immediately if I rev up the engine (even though car is stationary)

hello everyone, I own a 2005 Nissan M...

Brake & Turn Signal Out - One side only

2002 Ford Ranger 3.0 V6, 5-speed manual ...

Seeking Advice: Strange Noise in 2017 Nissan Versa Note, Mechanic Stumped

Hey everyone, A few weeks ago, my mom's...

Replacing Tires

My daughter just purchased a 2013 Honda ...

uses oil; change oil or just filter

I have a car that burns more than a qt o...

2009 jeep grand cherokee charging system failure

2009 grand cherokee charging system fail...

2003 civic tires " cupped out " Worn

These were winter tires that were left o...

HELP! 2007 chevy silverado randomly engage 4x4 while driving

Sign up here!

Search for (search options)

Auto Repair Home>> Automotive Repair>> Transmission Problems

Tractorguy145
New User

Nov 16, 2017, 11:21 PM

Post #1 of 3 (1571 views)

HELP! 2007 chevy silverado randomly engage 4x4 while driving	Sign In

2007
Chevrolet
1500 silverado classic
5.3 liter
160000 miles
While driving down the road the 4wd indicator will suddenly come on, a second later you hear a pop then a grinding noise like it's engaging 4x4 while moving. Have to completely stop and you'll hear another pop and you can drive again, but it never engages but the indicator stays on until key cycle. Been randomly doing this for couple months nobody can tell me anything.
It's not electric button either, it has the manual lever in the floorboard. So please let me know if anybody has heard of this and know what to do

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Nov 17, 2017, 8:08 AM

Post #2 of 3 (1531 views)

Re: HELP! 2007 chevy silverado randomly engage 4x4 while driving	Sign In

Do you know the model of transfer case this has? There should be a label on the transfer case itself with the model number.

Might need to have someone with a high end scan tool monitor the PCM data pid for the axle switch signal. If you can't do that, you may need to make some checks with a volt meter to monitor the transfer case control switch signal and the front actuator voltages. Could be a faulty transfer case control switch or actuator issue causing the actuator to front end to lock up with driving.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Nov 17, 2017, 8:09 AM)

gsferraro
Veteran

Nov 17, 2017, 3:38 PM

Post #3 of 3 (1510 views)

Re: HELP! 2007 chevy silverado randomly engage 4x4 while driving	Sign In

Hello,
No button, do you have an AWD and not 4x4, what can you select 4high and 4low? First thing to look at is tire size, are all 4 tires the same model and size? Tire size is very critical on awd and 4x4 cars, if a wrong size tire is on the car, the computer interprets this as a slip and would apply the transfer case. I have a special tool in my shop to measure tire size called a stagger gauge. Gary

Search for (options) Privacy Sitemap