Car Problem Reports

Chevrolet Suburban 1500 4WD Transfer Case Position Sensor/Selector Switch May Fail

Chevrolet Suburban 1500 Problem
38 Reports
Me Too

Model Years Affected: 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007

Drive Trains Affected: 2WD, 4WD

Average Mileage: 120,829 mi (38,000 mi - 202,000 mi)


The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. Fault code(s) stored in the transfer case control module will be of assistance in determining the exact fault causing the message to be displayed.

  •  Rookie

    4WD Service light came on intermittently. 4WD/2WD indicator lights would indicate Neutral or 4WD-L and the engine would bog down until it shifted out of Low. "System Stability Disabled" warning would also come on. Took to a mechanic that want about $570 to instal the new 4WD Transfer Case Postion Sensor. this really seams to be a manufacturing defect, but it past warranty.

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  • Visitor, , 4WD, 180,000 mi

    service 4x4 light on

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  • Visitor, , 4WD, 99,000 mi

    On 4 wheel drive indicator panel, light goes from 2WH to Neutral, service 4wheel drive is displayed and Traction Control System is disabled.

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  • Visitor, , 4WD, 118,000 mi

    sometimes when driving my truck will shift into 4wd and when i push the button to put it back into 2wd the light just flashes. i have to restart my truck several times before it will switch back.

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  • Visitor, , 4WD, 130,000 mi

    Service 4 wheel drive message information center and sometimes the switch is disabled with no orange lights and disabling the control.

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  • My truck automatically goes from 2wd to 4wd then stays in neutral

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  • Visitor, , 4WD, 135,000 mi

    shifts it self out of 2 wheel drive, lite blinks and will not engage and go into gear. Works later after a few minutes. When in 4 wheel , it will not in engage sometimes and message comes on to service 4 wheel drive. From research it seem that it is the transfer case sensor. It has done one or more of these things in the last 30 days and then run ok

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  • I replaced the 4wd transfer switch in 2007 and
    now again it is not working, this would be the
    second switch I would replace, all GM parts

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  • Visitor, , 4WD, 130,000 mi

    Tranny went out at 128,000 miles, spent $2000.00 (at Aamco) for a rebuilt transmission. Now it will not go into gear unless I put it in 4WD Auto.
    Aamco now states;" it needs a new Transfer Case and Encoder motor at $800.00.
    It doesn't pass the smell test for me!!!!!
    Elston Howard

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  • Visitor, , 4WD, 62,000 mi

    service 4 wheel drive message p01837

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