1. Welcome To GMTruckClub.com!

    The #1 Chevy Truck Forum Online
    Online since 2004, we are the #1 Chevy Truck & SUV forum and user community. If you have any questions about your Chevy or GMC Truck, SUV or Crossover, or just want to connect with other GM owners and enthusiasts around the world, you've found the best place on the internet to do that.

    Join Today ~ It's Free
    Registering is Free and Easy! Hope to see you on the forums soon!

Vacuum Line???

Discussion in 'GM Powertrain' started by jnbascom, Dec 14, 2009.

  1. jnbascom

    jnbascom New Member

    I have a vacuum line that I am trying to locate. It goes in the puck looking thing where the PCV valve plugs into. It is a smaller line probably 1/4 inch but it doesn't go anywhere. It has vacuum while the motor is running. Could this line have something to do with the front differential not engaging? The car is a 1999 GMC Jimmy 4X4.

    Thanks in advance for any help with this.
  2. brianj

    brianj Rockstar

    The front diff. locks through vacuum. It sounds like the line for the 4x4 is off - you need to check a manual to see how it is supposed to be routed.

Share This Page