For 1990-2009 cars

# Snow Intrusion Into Rr Drum Brake Assem (Replace Rr Brake Assem Backing Plates)

Subject: | Snow Intrusion Into Rear Drum Brake Assemblies (Replace Rear Brake Assembly Backing Plates)

Models: | 1985-89 Buick Skyhawk

| 1985-87 Buick Somerset

| 1985-98 Buick Skylark

| 1985-88 Cadillac Cimarron

| 1985-2000 Chevrolet Cavalier

| 1985-88 Oldsmobile Firenza

| 1985-91 Oldsmobile Cutlass Calais

| 1992-98 Oldsmobile Achieva

| 1985-94 Pontiac Sunbird

| 1985-98 Pontiac Grand Am

| 1995-2000 Pontiac Sunfire

### Condition

Some customers may comment that after operating their vehicle in snow and then parking the vehicle for an extended period, the rear brakes appear to remain applied.

### Cause

On rare occasions, light powdery snow may enter one or both of the vehicle's rear drum brake assemblies. If the vehicle is parked prior to the snow melt (water) being expelled, this may result in the rear brake shoe(s) adhering/freezing to the brake drum(s). Normally, the brake shoe(s) will break free of the drum upon placing the vehicle in gear. However, cases have been noted where vehicle movement has been restricted until the brake assemblies have had an opportunity to thaw.

### Correction

Replace existing rear brake backing plates with new backing plates, P/N 18015841. Refer to the Drum Brakes sub-section in the Service Manual for replacement procedures.

### Parts Information

Part Number | Description | Qty
--- | --- | ---
18015841 | Brake Backing Plate | 2

Parts are expected to be available from GMSPO, April 10, 2000.

### Warranty Information

For vehicles repaired under warranty, use:

Labor Operation | Description | Labor Time
--- | --- | ---
H0437 | Brake Backing Plate - Replace | Use published labor operation time