Question about Chevrolet Silverado 1500

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Service 4x4 light comes on every now and then in my 99 1500 silverado. what do i need to do

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Take it to autozone first and have them check it with their tester. It's free of charge. Then go from there. Your ODB2 system analyzer may be cheap enough that it missed the code all together.

However if you bought it recently i would complain to the dealership and see if they can work in an arrangement to do a proper diagnostic on the vehicle for free. They might even knock some of the price off for the repair if you have recently purchased the truck within the past few months.

The first thing i would check is the 4x4 selector switch. I know for a fact that these will throw a service 4x4 code if they are unplugged or shorted. They sell for 50-60$ or you may find one at a local salvage yard for cheaper.

Taking this out and checking it only takes a few seconds, just simply pop the switch out of the dash with the edge of your pocket knife. After you get it out theres a few more tabs surrounding the back plate, and this is where the circuit board is located.

I would inspect it visually to make sure nothing looks corroded and also take a sniff of it to insure there isn't a burnt smell. If it were the 4x4 actuator the lights would still illuminate on the selector switch, it just wouldn't engage the 4x4.

Posted on May 01, 2010

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    INDIRA KUMAR May 01, 2010

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