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 the Express and Savana models and add information to the Correction section. Please discard Corporate Bulletin Number 03-03-10-001C (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 as follows: Replace road wheel P/N 9593915 with P/N 9595245. Replace road wheel P/N 9593150 with P/N 9595306. Replace the spare wheel with P/N 9595245 on all vehicles.

For vehicles repaired under warranty, use: