Question about 2005 Chevrolet Avalanche

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Service 4wd displays on dash

I have a couple of friends with 05 Chevy Avalanches. they recently called me up regarding a problem with their 4wd.while driving the service 4wd drive will come on and then clear.We"re wondering if anyone else is having the same problem and what could this be. I know one of the guys his vehicle to the dealership and had an encoder motor or something replaced but it didnt resolve the problem. just thought we'd ask for a bit of knowledge on this matter.

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  • cbwhitty Mar 11, 2009

    I've had my Avalanche for 3 years, never had this code show up, took it to have the tires balanced and rotated at 96,000 miles. The "service 4wd" showed up as i drove away from the tire shop. Is there anything the tire shop could have done to cause this code to show up? Very suspicious coincidence.

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I had the service 4 wheel drive message come up on my dash. Then my 4x4 switch would stop working. It would lock me it 4 wheel drive. But if i shut off the truck and restart it would start working agian. So finally i had the truck scaned and they told me i needed a new 4x4 switch. so i bought mid february one and so far so good. I was told that the switch is a very comen problem. I hope this helps.

Posted on Apr 14, 2009

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Check Solenoid at tranny and Actuator switch. Take it to get a trouble code at parts store for free . Autozone, Kragen's Checker Auto, etc.

Posted on Jan 20, 2009

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