FOUR WHEEL DRIVE DOESN'T WORK

2006 GMC Sierra

Tiny

Scooter2007

August, 19, 2013 AT 4:55 AM

When I push the button for four wheel drive the button lights up but the front wheels do not engage. I replaced the front axle actuator and still nothing. I can hear the shift motor on the transfer case working and the front axle actuator working as well. No service four wheel drive is indicated on the dash. When I push the four low button the transmission is geared down but still no power to the front wheels. The transfer case even makes a clunking noise when shifted to four low as if it is working. I'm lost. Any suggestions on what to do?

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1 Answer

Tiny

hmac300

August, 19, 2013 AT 7:04 AM

Scan for codes and check encoder motor on tcase that may be your problem. See if it moves like it is supposed to it may not. Check for a vacuum leak as well

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