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allison wont shift

Discussion in 'Chevy Trucks' started by nathanlacourse, Dec 16, 2008.

  1. nathanlacourse

    nathanlacourse Member
    Messages: 37

    try to put in gear and does not move the light on the indicator just blinks
  2. Rangerman

    Rangerman Senior Member
    Messages: 148

  3. Philbilly2

    Philbilly2 PlowSite Veteran
    Messages: 3,770

    what year is the truck?

    have you ever changed the NSBU switch?

    what color is your NSBU switch? (tan or black)
  4. LHK2

    LHK2 Senior Member
    Messages: 205

    Take it to an allison dealer and have them reflash the computer, or for a short term fix, disconnect the battery cables and touch them together and leave disconnect for 10 min.