GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Electrical 🢒 Drive Belt Replacement

Removal Procedure

    Object Number: 657564 Size: SH
  1. Install a 3/8 inch breaker bar into the tensioner opening and rotate the tensioner counterclockwise.

    2. Object Number: 812344 Size: SH
  2. Remove the drive belt (1) from the drive pulleys, if equipped with a single generator (Federal emissions).

    3. Object Number: 812348 Size: SH
  3. Remove the drive belt (1) from the drive pulleys, if equipped with a single generator and vacuum pump (California emissions).

    4. Object Number: 812347 Size: SH
  4. Remove the drive belt (1) from the drive pulleys, if equipped with dual generators (Federal emissions).

    5. Object Number: 812350 Size: SH
  5. Remove the drive belt (1) from the drive pulleys, if equipped with dual generators and vacuum pump (California emissions).
  6. Slowly release the tension on the tensioner arm.

Inspection and Repair
  1. Inspect the drive belt for excessive cracking or any visible damage to the drive belt.
  2. Replace the drive belt if there is damage or excessive cracking.

Installation Procedure

    Object Number: 812350 Size: SH
  1. Install the drive belt (1) to the drive pulleys, if equipped with dual generators and vacuum pump (California emissions).

    2. Object Number: 812347 Size: SH
  2. Install the drive belt (1) over all of the pulleys except the tensioner pulley, if equipped with a dual generators (Federal emissions).

    3. Object Number: 812348 Size: SH
  3. Install the drive belt (1) to the drive pulleys, if equipped with a single generator and vacuum pump (California emissions).

    4. Object Number: 812344 Size: SH
  4. Install the drive belt (1) over all of the pulleys except the tensioner pulley, if equipped with a single generator (Federal emissions).

    5. Object Number: 657564 Size: SH
  5. Install a 3/8 inch breaker bar into the tensioner opening and rotate the tensioner counterclockwise.
  6. Route the drive belt over tension pulley.
  7. Slowly release the tension on the tensioner arm.

    8. Object Number: 665064 Size: SH
  8. Inspect for proper drive belt installation.

    9. Object Number: 665067 Size: SH
  9. Avoid mis-positioning the drive belt by one or more grooves.

    10. Object Number: 665072 Size: SH
  10. Confirm the proper drive belt size and the correct drive belt routing by observing the location of the pointer and index marks on the drive belt tensioner. With a new drive belt installed the pointer should align within the index marks on the drive belt tensioner.

    11. Object Number: 665075 Size: SH
  11. With a used drive belt installed the pointer should not align past the index marks.