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GMC EXPERTS YOU CAN TRUST

GMC Service & Repair

Acadias, Sierras and Terrains, at our Wilmington and Millsboro shops.

  • AAA Approved

    Auto Repair Facility

  • NAPA Auto Care Center

    Nationwide network

  • ASE Certified

    Master technicians

  • 3-Year / 36,000-Mile

    Nationwide warranty

  • Family & Veteran Owned

    Three generations

  • 60 Years in Delaware

    Since 1966

GMC SERVICE IN WILMINGTON & MILLSBORO

The GMCs We See Most, and What They Need

We've had more than 120 GMCs through our two shops in the last two years, mostly 2005 to 2022 models. Acadias lead, then Sierra 1500s and Terrains.

Each one has a Chevrolet sibling. The Sierra shares its engineering with the Silverado, the Terrain with the Equinox, and the first-generation Acadia (2007–2016) with the Traverse. So most of what we know from 440+ Chevrolets applies to your GMC too.

The jobs GMC owners bring us most are oil changes, brakes and check engine light diagnosis. Gasoline GM engines from the 2011 model year on call for a dexos-approved oil, and we check the exact spec for your engine every time. Older 2.4-liter Terrains share the Equinox's reputation for using oil between changes, so check the dipstick between visits.

For the rest of the GM family, see our GM page.

FROM OUR SHOP RECORDS

Buckley's and your GMC

VEHICLES SERVICED
120+ GMC vehicles serviced in the last 2 years (mostly 2005–2022 models)
MODELS WE SEE MOST
Sierra 1500, Acadia, Terrain

Counts from our own repair records, updated nightly and rounded down. No customer details are shown.

ASKED & ANSWERED

Questions About Your GMC

Real questions Delaware drivers ask us all the time. Don’t see yours? Call our Wilmington shop at (302) 999-8285 or our Millsboro shop at (302) 947-4148.

  • The Acadia, Sierra 1500 and Terrain, mostly 2005 to 2022 models.

WILMINGTON & MILLSBORO, DE

Book Your GMC's Next Service

Make an appointment online, or call either shop. We'll tell you what we find before any repair.

TWO LOCATIONS · ONE STANDARD

Find the Buckley’s Closest to You

NEW CASTLE COUNTY · DE

Buckley’s Wilmington

1604 E Newport Pike
Wilmington, DE 19804

(302) 999-8285

Mon–Fri · 8:00 AM – 5:00 PM

Our flagship Wilmington shop has been the heart of Buckley's Auto Care since we moved into this 1/2-acre lot in 2006. Conveniently positioned near the I-95 / Route 141 interchange, we're an easy stop for drivers across northern New Castle County.

Location details →

SUSSEX COUNTY · DE

Buckley’s Millsboro

28858 Harmons Hill Rd
Millsboro, DE 19966

(302) 947-4148

Mon–Fri · 8:00 AM – 5:00 PM

Our Millsboro location brings the same family-owned, AAA-approved Buckley's experience to drivers across Sussex County. Tucked just off Route 5 and Harmons Hill Road, we're a quick stop for the beach communities, retirement neighborhoods, and small fleets that call southern Delaware home.

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