Identifying GMC (GM) Catalytic Converters for Scrap
Sell Your Catalytic Converters to RRCats
GMC catalytic converters are commonly found in trucks, SUVs, and heavy-duty utility vehicles, making them a valuable find for scrappers. While they share some similarities with other General Motors (GM) brands—like Chevrolet, Buick, and Cadillac—GMC converters have unique characteristics that can help you identify them quickly and accurately. Knowing what to look for can ensure you get the best value when selling to RRCats.
Recognizing GMC Branding & Part Numbers
GMC catalytic converters are typically marked with distinct identifiers, making them easier to spot:
- GMC Stamping: Look for the “GMC” name stamped directly onto the converter shell or etched into the heat shields.
- GM Part Numbers: These often begin with “GM” followed by 7–9 digits
- GM25130887,
- GM12643927.
- Shared GM Markings: Some converters may be stamped “GM,” which is a common marking shared across Chevrolet, Buick, Cadillac, and GMC. In these cases, identifying the vehicle model is key.
Identifying Common Shapes & Constructions
GMC catalytic converters are built for durability, reflecting the brand’s focus on trucks and heavy-duty vehicles:
- Larger, Rugged Housings: Especially common on Sierra, Yukon, and HD models.
- Multiple Converters per Vehicle: V8 engines often have two or four converters—smaller pre-cats near the engine manifold and larger main converters along the underbody.
- Heavy-Duty Heat Shields: These are common to protect the converters from debris and damage during off-road or high-load use.
How GMC Converters Differ from Other GM Brands
While GMC shares many parts with other General Motors brands, their converters have distinct features:
| Feature | GMC Converters | Other GM Brands (Chevrolet, Buick, Cadillac) |
|---|---|---|
| Markings | GMC, GM with specific part numbers | GM, Chevrolet, Buick, Cadillac |
| Size and Build | Larger, rugged designs for trucks and SUVs | Smaller or standard designs for sedans and coupes |
| Vehicle Type | Primarily trucks, SUVs, and heavy-duty vehicles | Sedans, coupes, crossovers, luxury models |
| Scrap Value | Often higher due to larger size and precious metal content | Moderate, depending on model and make |
Spot GMC Converters at a Glance
We’ve assembled a gallery of images showcasing the most common shapes, markings, and configurations of GMC catalytic converters. These real-world examples will help you quickly recognize GMC converters in the field. Scroll down to see the gallery and become an expert at identifying high-value GMC catalytic converters.
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