Here's a breakdown of what to consider:
* Severity of Rust: If the rust has only affected the backing plates themselves and the drum, axle, and other components are in good shape, replacing only the backing plates is feasible. However, if the rust has significantly compromised the integrity of the axle housing or drum, you'll need more extensive repairs. Severe rust may indicate other issues requiring attention.
* Parts Availability: Check with your local Chevrolet dealer or auto parts store to see if they stock replacement backing plates for your specific truck model and year. They should be able to cross-reference your vehicle's information to find the correct parts. Aftermarket options are often available as well.
* Difficulty of Repair: Replacing backing plates is a moderately challenging DIY job. It requires removing the wheels, drums, and possibly the shoes depending on the design. You'll need basic automotive tools including sockets, wrenches, and potentially a brake spring compressor. If you lack experience with brake work, it's best to take it to a mechanic. Improper installation could lead to brake failure.
* Safety Considerations: Working on your brakes is crucial for safety. If you're not comfortable or experienced with brake repair, don't attempt it yourself. A mistake could lead to brake failure and a serious accident.
In short: While replacing only the backing plates *is* possible, a thorough inspection of the entire braking system in the rear axle is necessary before ordering parts. You need to assess the damage and determine if more extensive repairs are required. If you're unsure, taking your truck to a qualified mechanic is the safest course of action. They can properly diagnose the issue and perform the necessary repairs to ensure your brakes are safe and reliable.
