Typical replacement costs range from about $900 to $2,500, depending on whether one or two converters are involved and whether you choose aftermarket or OEM parts. Labor rates and the truck’s specific configuration can push the total higher or lower.
Replacing a catalytic converter on a 2015 GMC Sierra depends on several factors, including how many converters the system uses (many configurations have two, one per exhaust bank), the choice between OEM and aftermarket parts, and local labor rates. Theft, rust, and accessibility can also affect the final price. The sections below break down typical costs, influencing factors, and how to obtain a precise quote for your vehicle.
What drives the price
Costs come from parts, labor, and the truck’s exhaust configuration. Here are the main factors you'll encounter:
- Number of catalytic converters to replace (single vs. dual bank).
- Parts choice: aftermarket direct-fit versus OEM; aftermarket is usually cheaper but may affect warranties.
- Labor time and regional shop rates; typical rates vary by location and demand.
- Additional work often required (gaskets, oxygen sensors, rusted clamps, or pipe cutting).
- Related components (diagnostics, sensors) that could add time and cost if issues are found.
Understanding these factors helps you prepare for a precise quote from a service provider.
Cost ranges by setup
Below are typical price ranges you might see in most U.S. shops. The numbers assume a standard replacement with conventional parts; actual quotes can vary by location, shop, and vehicle specifics.
- Single catalytic converter replacement (one bank):
- Parts: aftermarket $200–$600; OEM $500–$1,100
- Labor: $150–$450
- Typical total: $350–$1,550 (aftermarket) or $650–$1,550 (OEM)
- Dual catalytic converter replacement (both banks):
- Parts: aftermarket $400–$1,200 total for both; OEM $1,000–$2,200 total for both
- Labor: $300–$800
- Typical total: $700–$2,000 (aftermarket) or $1,300–$3,000 (OEM)
Note: If the converters were stolen, or if the exhaust system requires cutting, welding, or replacement of sensors or gaskets, the price can be higher.
How to get an accurate quote
- Identify your exact engine and whether your truck uses one or two catalytic converters (this can be confirmed via VIN details or a shop inspection).
- Get written quotes from at least 2–3 independent shops and, if available, a dealership service department.
- Ask each shop to itemize parts and labor and to specify whether the parts are OEM or aftermarket.
- Inquire about warranties on both parts and labor and whether the catalytic converter is covered by any emissions warranty or recall/service bulletin.
- Consider long-term costs: cheaper parts now may lead to more maintenance later; verify compatibility with your state’s emission standards.
Concluding: obtain multiple quotes, understand parts choices, and confirm any warranties before making a decision.
Summary
Replacing a catalytic converter on a 2015 GMC Sierra typically costs about $900 to $2,500, depending on whether you replace one or both converters and whether you use aftermarket or OEM parts. Labor and regional rates, plus any additional repairs, can shift the total. For the most accurate price, request written estimates from multiple shops with clear part lists and warranty terms.