GMC Truck Repair in Ronkonkoma, NY
GMC commercial vehicles like the Savana Cutaway, TopKick, and Sierra 3500HD are built to handle serious hauls, upfits, and delivery demands. But when these trucks go down, you need fast, brand-specific repairs that get it right the first time.
At K&M Truck Repair, we specialize in GMC Class 3–6 vehicles, offering advanced diagnostics and OEM-level service. From Duramax diesel engines to transmission failures and emission system problems, we’ve got your GMC covered bumper to bumper.
We service:
- Duramax engine diagnostics and repair, including injector and turbo issues
- DEF system service, EGR valve cleaning, and DPF regeneration support
- 6-speed and Allison transmission service, repair, and replacement
- Fuel system repairs, including pumps, filters, and pressure regulators
- Electrical diagnostics and wiring trace-outs for modules and sensors
- Steering, suspension, and brake system inspections and repairs
- Scheduled maintenance, fluid service, and DOT inspections
We handle single GMC trucks and fleet service for box trucks, dump bodies, utility bodies, and cargo vans.
Experience the K&M Difference!
We know that every hour your GMC is off the road means lost revenue. At K&M Truck Repair, we bring together manufacturer-grade tools, deep diesel expertise, and personalized communication to keep your business moving. We’re trusted becuase:
Dealer-quality repairs: We use OEM-level diagnostics and install only high-performance parts.
Relentless troubleshooting: We dig deeper to find the root of every failure, not just reset a code.
Outstanding customer service: From scheduling to updates to final pickup, we keep the process seamless and straightforward.
Contact Us About GMC Truck Repair Now: Call 631-331-0066!
Trouble codes, limp mode, or performance loss in your GMC? Call 631-331-0066 today to schedule your GMC truck repair with K&M Truck Repair. Prefer texting? Reach us at 833-267-3752 — we’ll confirm your appointment and get your truck back on the road.
FAQs
What areas do you serve for GMC repair?
We are located at 3045 Veterans Memorial Highway, Ronkonkoma, NY 11779, right off I-495. We proudly serve Ronkonkoma, NY; Patchogue, NY; Brentwood, NY; Smithtown, NY; Bay Shore, NY; Holbrook, NY; Medford, NY; Central Islip, NY; Sayville, NY; and Bohemia, NY.
What are common problems with GMC trucks?
GMC trucks often experience DEF quality issues, DPF clogging, Duramax turbo failures, transmission slipping, and electrical sensor malfunctions. Early detection and proper diagnostics can help prevent breakdowns and expensive repairs.
Why does my GMC say "service exhaust system"?
This message usually means your truck’s DPF system is clogged, the DEF fluid is contaminated or low, or an exhaust sensor has failed. If left unchecked, this can force your truck into limp mode to protect the engine.
How can I get a GMC repair?
If your GMC truck is showing fault codes, running rough, or having regen issues, call 631-331-0066 or text 833-267-3752. Our team will run diagnostics, explain the issue clearly, and repair it fast — so you can get back on the road.
K&M Truck Repair
Keeping You On The Road
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Reviews
Customer Testimonials
"Was looking for a new shop to work on my truck and these guys were phenomenal. Took me right in, kept me informed throughout the process and expeditiously had me back up and running. Their knowledge and workmanship is incredible. If you're looking for a great shop to bring your truck to, look no further because these are your guys,"
- Daniel
Contact & Location
Billing
Here at K&M TRUCK REPAIR, we know that any product or service that streamlines your fleet repairs saves you time and money, so we now have cbCharge available. It is a simple and free charge account that consolidates your billing through a secure online portal and provides 30-day payment terms with no interest or late fees. Your fleets repairs and maintenance are completed and billed and emailed from K&M TRUCK REPAIR. Then you get one monthly invoice from cbCharge, similar to a credit card bill.
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