GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C-Series Medium Duty Truck B7 🢒 Engine 🢒 Engine Mechanical - 7.4L 🢒 Drive Belt Replacement

Removal Procedure

    Object Number: 177620 Size: SH
  1. Install a 3/8 inch drive wrench on the tensioner arm and rotate the arm counterclockwise.
  2. Remove the drive belt.
  3. Slowly release the tension on the tensioner arm.

Installation Procedure
  1. Route the belt over all the pulleys except the tensioner arm.

    2. Object Number: 43858 Size: SH

    Important: Refer to the Underhood Label for the proper drive belt routing graphic.

  2. Observe belt routing for vehicles without air conditioning.

    3. Object Number: 43859 Size: SH
  3. Observe belt routing for vehicles with air conditioning.

    4. Object Number: 177622 Size: SH
  4. Install a 3/8 inch drive wrench on the tensioner arm and rotate the arm counterclockwise.
  5. Install the belt over the tensioner arm pulley.
  6. Slowly release the tension on the tensioner arm.
  7. Confirm that the belt is properly routed.