Chevrolet Silverado 2007-2013: Why is My 4WD Selector Light On?
Read more to learn how to troubleshoot your Chevrolet Silverado 1500's 4WD selector light.
This article applies to the Chevrolet Silverado 1500 (2007-2013).
If the 4WD selector light in your truck won't work properly, the problem could be any number of things. However, don't anticipate making a drive down to your local Chevrolet dealer or mechanic for help just yet. Using just a few handy troubleshooting tips and inexpensive materials, you can usually diagnose and repair a faulty 4WD selector light in about 15 minutes to an hour. Here are a few simple things you can do to get this light working properly again.
Materials Needed
- On-board diagnostic tool
- Heavy weight gear oil
- Transfer fluid oil
- 4WD sensor replacement
Step 1 – Check the fluid in the transfer case
It might be too low or bad.
Lubrication is especially important if you won't be switching your Silverado 1500 into 4DW on a regular basis. To avoid having your 4WD selector light come on and go off at random, it's recommended that you switch your vehicle into 4WD at least once a month and properly maintain your transfer case fluid.
- When the engine is cool, remove the drain and fill plug at the bottom of your transfer case, which should be facing your rear axle.
- Replace the old transfer case oil, as needed, using a premium grade transfer case oil.
- It's recommended that you also check the fluid in your front differential.
- Use a premium-quality, heavy-weight gear oil from your local auto parts store.
Step 2 – Replace the 4WD selector switch on the dashboard
It might be faulty.
- This is an easy DIY repair that costs just $55 to $60 for parts.
- This easy-to-use plug and play replacement requires less than 15 minutes.
- If your truck is still under warranty, you can set up a service appointment to have your dealer complete the repair at no cost to you.
Step 3 – Check the codes
There might be an electrical problem, or your fuse has blown.
Using an on-board diagnostics tool, check your vehicle's trouble codes. However, generally speaking, the usual culprits are a faulty 4WD sensor, low or bad transfer case fluid or part failure due to infrequent use.
- Checking your codes is also important if you've been lax in following your 4WD system maintenance schedule.
- If there is an electrical problem, it's recommended that you seek the help of licensed automotive professional.
- Your mechanic or dealer will check your vehicle's wiring and 4WD system as well as perform other diagnostics.
- It's worth noting that the problem could be a faulty actuator in your transfer case, which should be covered under your warranty.
Related Discussion
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