DeCosky GM Center

DeCosky GM Center

510-550 Harcourt Rd, Mt Vernon, OH 43050

New 866-281-3983
Used 888-353-5697
Service 866-634-5214

Nobody Sells For Less!

As your Mount Vernon Buick, Cadillac, Chevrolet, and GMC dealer we offer a friendly and knowledgeable sales staff, body and service shop, and even loaner cars. This is why Mount Vernon Chevrolet, Buick, GMC, and Cadillac customers alike make Decosky GM Center their new and used car truck dealer.We carry a large selection of new and used cars, trucks, and SUV's, as well as making it easy to get a quote, research financing, calculate payments or contact our service department online. No dealer covers Knox County better than Decosky GM, your Mount Vernon, OH GM dealer

New Cars

This dealer has 129 new vehicles.

Used Cars

This dealer has 101 used vehicles.

Service & Repair

This dealer has:

  • Warranty for parts and service
  • Expert technicians
  • Multiple service bays
  • Brand-name certified service center
  • Quality manufacturer's parts
  • Convenient hours and amenities

Learn More |Pricing

Dealer Reviews

3.8 out of 5.0


Customer Service
Buying Process
Quality of Repair
Overall Facilities

3 out of 4 people recommended this dealer.

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Hours of Operation

8:00 AM – 8:00 PM
9:00 AM – 8:00 PM
9:00 AM – 8:00 PM
9:00 AM – 8:00 PM
9:00 AM – 6:00 PM
9:00 AM – 5:00 PM

Contact This Dealer

New Cars

866-281-3983, ask for Robert Devlin
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Used Cars

888-353-5697, ask for Robert Devlin
Email this dealer Cancel