Tire Slowly Goes Flat and/or Excessive Wheel Vibration Caused by Bead Splits (Replace Wheels with New Heavy Duty Rim Version)

This bulletin is being revised to add model years, a model and a part number. Please discard Corporate Bulletin Number 03-03-10-001B (Section 03 -- Suspension).

Important: Implementation of this service bulletin by "GM of Canada" dealers requires prior District Service Manager approval.

Some customers may comment on a tire that slowly goes flat and/or excessive wheel vibration. This condition is more apparent on vehicles in which customer usage typically involves frequent severe conditions such as:

The wheel may experience a crack or split in the outboard bead seat weld area. A weld attaches the rim and disc together on full-face wheels in this area. To identify this wheel, it is offered in a silver painted version , P/N 9593915, code "TZA" and a chrome-clad version, P/N 9593150, code "RSC" (these codes are stamped into the wheel's disc near the bolt holes).

Important: Wheel replacement should only be done for air loss and/or vibration caused by bead splits.

A new heavy-duty rim version of these wheels has been released for service. The new heavy-duty painted wheel is P/N 9595245, code "FFU" used as a road wheel and spare. The new heavy-duty chrome clad version is P/N 9595306, code "FFW" used as a road wheel only (these codes are stamped into the inboard rim flange balance weight area, and are also on a sticker near the bolt holes). If a condition of a crack or split as described above occurs, all (5) five of the original wheels on the vehicle should be replaced with the new heavy-duty wheels.

For vehicles repaired under warranty, use: