1. Welcome to PlowSite. Notice a fresh look and new features? It’s now easier to share photos and videos, find popular topics fast, and enjoy expanded user profiles. If you have any questions, click HELP at the top or bottom of any page, or send an email to help@plowsite.com. We welcome your feedback.

    Dismiss Notice

No 4x4

Discussion in 'Truck & Equipment Repair' started by pabaker66, Jan 6, 2014.

  1. pabaker66

    pabaker66 Senior Member
    Messages: 117

    I have a 1999 gmc Yukon 1500. It has the push button 4 wheel drive switch on the dash. The switches are working properly.

    The problem is- no 4 wheel drive in reverse.

    When plowing forward the 4 wheel drive works great. It will push snow like a tank. As soon as I shift into reverse there is no 4 wheel drive!

    I have replaced the axle actuator.

    Any thoughts on what it might be?
  2. CleanCutL&S

    CleanCutL&S Senior Member
    Messages: 146

    Check the P-R-N-D-L Switch. (Tells truck what gear its in) :mechanic:
  3. danknight163

    danknight163 Member
    Messages: 65

    3 things to check on these trucks (i have owned gm since 14) 1 fluid level 2 is power getting to the actuator if yes do you hear it move if no replace 3 check fuses they blow when there is a hot trans
    hope this help