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My 2003 Chevrolet Silverado Z-71 sometimes randomly switches out of 2wd into 4L,4Hi,N,or 4auto after we shut off the truck. When we start the start up the truck we have to switch back to 2wd. Thewre are no error codes or service 4wd and the trans runs and shifts fine.

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Hi! Looks pretty much a transmission solenoid failure. If the transmission solenoids are faulty issues like this can occur. You will need to have the solenoids replaced and you'll be good. Hope this helps and thank you for using FixYa!

Posted on Sep 05, 2010


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