Complete OEM service intervals, DIY guides, parts list, and how-to videos for the 2015 GMC Sierra 2500HD.
Track Your GMC Sierra 2500HD Free →| Maintenance Task | Interval |
|---|---|
| Engine Oil & Filter Change | Every 7,500 miles |
6.6L Duramax diesel: ACDelco dexos2 5W-30, 10.0 qt. 6.6L gas (L8T): dexos1 0W-30, 7.0 qt. Severe duty: 3,750 mi. | |
| Engine Air Filter Replacement | Every 30,000 miles |
Inspect every 15,000 mi; replace sooner if driving in dusty conditions. | |
| Cabin Air Filter Replacement | Every 15,000 miles |
Replace more frequently in high-pollen or dusty areas. | |
| Tire Rotation | Every 7,500 miles |
Rotate every other oil change. Inspect tread depth and wear patterns. | |
| Tire Pressure Check | Every 5,000 miles |
Check when cold. Follow door-jamb placard, not tire sidewall max. | |
| Brake Pad Inspection | Every 20,000 miles |
Inspect thickness. Replace at ≤3 mm friction material. Severe duty: inspect every 10,000 mi. | |
| Brake Fluid Exchange | Every 45,000 miles |
Moisture contamination reduces boiling point. Use OEM-spec DOT fluid. | |
| Coolant Exchange | Every 150,000 miles |
GM DEX-COOL (orange). 6.6L diesel ≈22.0 qt. 6.6L gas ≈16.5 qt. Check DCA4/nitrite levels on diesel every 15,000 mi. | |
| Transmission Fluid Change | Every 45,000 miles |
Allison 10L1000 (diesel): ACDelco ATF HP, ≈13.5 qt. 6L90 (gas): ACDelco dexronHP. Severe duty: 22,500 mi. | |
| Windshield Wiper Blade Replacement | Every 12,000 miles |
Replace when streaking, chattering, or cracking appears. | |
| Battery Inspection & Terminal Cleaning | Every 30,000 miles |
Clean terminals, check charge voltage (12.4V+ resting). Load-test after 3 years. | |
| Serpentine/Drive Belt Inspection | Every 30,000 miles |
Check for cracks, fraying, glazing. Replace per OEM schedule or at first signs of wear. | |
| Power Steering Fluid Check | Every 30,000 miles |
Top off if low. Investigate leaks. EPAS (electric) vehicles have no fluid. | |
| Fuel Filter Replacement | Every 30,000 miles |
6.6L Duramax: AC Delco fuel filter element, drain water separator at every oil change. Severe duty: 15,000 mi. | |
| Spark Plug Replacement | Every 60,000 miles |
Iridium plugs may last 100,000+ mi. Use OEM-specified plug type and gap. | |
| Suspension & Steering Inspection | Every 30,000 miles |
Check ball joints, tie rods, bushings, shocks/struts for play and leaks. | |
| Exhaust System Inspection | Every 45,000 miles |
Check for leaks, rust, loose hangers. Listen for changes in exhaust note. | |
| A/C System Check | Every 30,000 miles |
Verify A/C performance, check refrigerant level, inspect condenser for debris. | |
| Lubricate Door Hinges, Latches & Hood Striker | Every 15,000 miles |
White lithium grease or OEM-equivalent. Prevents squeaks and wear. | |
| Multi-Point Vehicle Inspection | Every 15,000 miles |
Comprehensive bumper-to-bumper check: lights, horn, belts, hoses, leaks, tire condition. | |
| Rear Differential Fluid Change | Every 45,000 miles |
11.5″ or 12″ axle: SAE 75W-140 synthetic. ≈4.5 qt. Add friction modifier if LSD. | |
| Front Differential Fluid Change | Every 45,000 miles |
4WD: SAE 75W-90 synthetic, ≈3.0 qt. | |
| Transfer Case Fluid Change | Every 45,000 miles |
4WD: ACDelco dexronVI, ≈2.0 qt. | |
Factory-recommended maintenance intervals directly from GMC's service schedule.
Exact parts and tools needed for each service, with direct Amazon purchase links.
Curated YouTube tutorials for every maintenance task, matched to your vehicle.
Automatic NHTSA safety recall notifications for your GMC Sierra 2500HD.
Log services, track mileage, and get reminders — all from your phone.
Selling? Generate a shareable service history link for potential buyers.