2006 Hummer H3 Maintenance
Manufacturer-Recommended Service Schedule
The manufacturer-recommended maintenance schedule for the 2006 Hummer H3 is shown above. Keeping up with these service intervals prevents premature wear, maintains fuel economy, and protects your powertrain warranty.
The most critical intervals are engine oil changes (typically every 5,000–10,000 miles for full synthetic), tire rotation (every 5,000–7,500 miles), and brake fluid (every 2–3 years). Always verify intervals against your owner's manual — the schedule varies by driving conditions.
| Service Item | Interval | Notes |
|---|---|---|
| Engine Oil & Filter | 5,000 mi / 6 mo | 5W-30 conventional, 5 qt (3.5L I5) or 6 qt (3.7L I5) |
| Tire Rotation | 5,000 mi / 6 mo | Rotate every 5,000 mi; check alignment after off-road use |
| Cabin Air Filter | 15,000 mi / 24 mo | Replace more often in dusty conditions |
| Engine Air Filter | 30,000 mi / 48 mo | Inspect at 15,000 mi; more often off-road |
| Brake Fluid | 30,000 mi / 36 mo | DOT 3 |
| Transmission Fluid | 50,000 miles | 4-speed automatic; Dexron VI |
| Transfer Case Fluid | 45,000 miles | Full-time 4WD; Autotrak II |
| Coolant | 100,000 miles | Dex-Cool OAT; then every 30,000 mi |
| Spark Plugs | 100,000 miles | Platinum-tipped |
| Serpentine Belt | 60,000 miles | Inspect at 40,000 mi |
| Battery | 48 months | Check terminals and charge annually |
Key Fluid & Maintenance Specs
Motor Oil
5W-30 Synthetic Blend — 5.5 qt
Lug Nut Torque
100 ft-lbs
Brake Fluid
DOT 3
Coolant
Dex-Cool (OAT)
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