Question about Chevrolet Silverado 2500HD
Already replaced my Electronic button/switches on the dash and the actuator above the skid plate that i believe goes into the transfer case and my light is still on and 4wd not working.. are there any relays or fuses that could cause this or where else should i look into fixing this problem.. Im confused and snows coming and i need this working ti plow.. Thanks all
Hook up an OBD-II reader to your truck and pull the fault readings.
Once you get the fault readings, you should be able to locate the source of the problem.
In the meantime, you can subscribe to online service manual sites at Chiltondiy.com, autozone, alldatadiy.com, RepairSolutions(Innova) where you can get and download your vehicle specs and input fault codes.
If this is a serious priority, go to a reputable ASE certified transmission shop- at the very least, pay them to diagnose the problem and if its something you can repair yourself, at least you monetary losses are negligible.
You already wasted time and money trying to repair the problem in guesswork.
BTW, talking off the top of my head, it could be a bad transfer case control module or a wiring fault.
Posted on Nov 26, 2013
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Posted on Jan 02, 2017
a little tip a friend gave me in unlocking the 4wd drive on ramps or hill and then put in neutral let roll back a foot put in park and then let off the 4wd
when in 4wd the hubs get a little heated cause they need greased so they stick into position making it hard to come out of 4wd this which i spoke of i got stuck in the senerio where i almost drove home in 4wd from 300 miles away but i called my friend he told me bought this and so i thought it could help you
your hubs just locked up on you your bearings are going to need to be packed again this is normal for this
Posted on Dec 06, 2008
SOURCE: 4wd not engaging
These trucks are famous for the transfer case control module failing
and causing problems like you are experiencing. The module is
usually located in the passenger foot well kick panel. You should
be able to find it easy since that is what is making the clicking noise
when you try to go into 4x4. When you find it-unplug the 2 connectors
and looks for green corrosion on the terminals in the plug and also on
the module. They are famous for water intrusion thru the heater system. If you find corrosion, terminals in the connectors will need to
be replaced as well as a new module(they are expensive).
Posted on Dec 14, 2008
Having the same exact problem but with my 1999 escalade. Thought it was the actuator bought a new one installed it transfer case would engage but front end wouldnt lock. Took it out of housing left it plugged in got a friend to go through all the 4wd for me and the plunger never moved out the actuator. Checked my wiring harness which is a four prong ann it had one hot prong like it is suppose to. Traced wires even replaced dash switch same problem. Taking it to local dealership tom to have it checked for codes. I was told it could be the transfercase actuator even though its workin that actuator is what sends power to the front to engage the actuator to lock the differential.
Posted on Sep 16, 2009
A mere 2,400km into the life of my 07 Rodeo TD 4WD, I used 4L for about 2km of medium-steep/slippery track. After stopping and selecting 2WD the 'Check 4WD' light appeared, meaning I was stuck in 2WD for the rest of that trip. Luckily I was able to complete the trip in 2WD without incident.
The dealer blamed me for 'not following the instructions in the manual' (utter codswallop), 'fixed' it, and very reluctantly gave me a scribbled set of instructions on resetting the system, which I've included below.
When I suggested that these instructions should be included in the manual, the response was 'not necessary if owners use the system correctly'. More cods.
Here's how to reset it:
1. Ignition off, hold all 3 buttons (2H, 4H & 4L) in together
2. Switch ignition on to 'reds' position (last position before start)
3. Hold in this state for 30 seconds
Hope this may be of use !!
Posted on Jan 06, 2010
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