If you drive a Chevy, GMC, Buick, or Cadillac in the Chicagoland area, you might wonder why your oil change takes 45 minutes to an hour — especially when some places advertise 15-minute service.
The short answer? Modern GM vehicles require precision, not speed.
Here’s what’s really happening during your oil change.
Quick Answer: How Long Does a GM Oil Change Take?
Most oil changes for GM vehicles take 45–60 minutes.
That time ensures:
- The oil fully drains
- The correct dexos-approved oil is used
- Every oil change includes a new oil filter. While some rapid-service locations focus on speed, skipping or rushing this step can compromise engine protection.
- Your vehicle receives a quick inspection
- Carwash
Why GM Oil Changes Take Longer
1. GM Vehicles Require dexos Oil
Most late-model Chevrolet, GMC, Buick, and Cadillac models require dexos-certified synthetic oil.
Using the correct oil:
- Protects and maintains different types of engines
- Improves fuel efficiency
- Maintains warranty coverage
Technicians must verify the exact oil grade (like 0W-20 or 5W-30), which takes care and accuracy.
2. Oil Must Fully Drain
Rushing the drain process can leave contaminated oil behind, particularly in larger-capacity engines that naturally take longer to fully drain. Giving the oil adequate time to empty ensures better lubrication and longer engine life.
3. The Oil Filter Is Replaced
GM engines use high-efficiency oil filters designed to trap debris and microscopic metal particles. Proper removal and installation are critical to preventing leaks and maintaining correct oil pressure — steps that many ultra-quick oil change shops rush or skip in order to save time.
4. Multi-Point Inspection Is Included
At most GM service centers, an oil change also includes:
- Tire pressure check
- Visual inspection for any leaks, cracks, or corrosion
- Brake inspection
- Fluid top-offs
- Battery check
- Resetting your Oil Life Monitoring System
Your GM’s Oil Life Monitoring System tracks driving conditions — not just mileage — so service timing may vary.
Is a Quick Oil Change Safe for GM Vehicles?
Quick lube shops can handle basic oil changes, but GM-certified service centers:
- Use factory-recommended dexos oil
- Follow manufacturer service procedures
- Update your digital service history and earn GM Reward Points for your visit
- Check for GM software updates or recalls
That extra time helps protect your investment.
How Often Should You Change Oil in a GM Vehicle?
Most modern GM models with synthetic oil can go 5,000–7,500 miles, depending on driving habits.
Always follow your vehicle’s Oil Life Monitoring System or owner’s manual. OnStar® will send a non-critical reminder at 20%, but it’s best to schedule your oil change before the 10% alert to ensure proper engine protection.
The Bottom Line
If your GM oil change takes a little longer, it’s usually because:
- The correct dexos oil is being used
- Your engine is fully drained
- Your filter is replaced properly
- Your vehicle is being inspected for safety
A thorough oil change today can prevent costly engine repairs tomorrow.
Need a GM oil change? Click Here to Schedule service with a certified GM technician to keep your Chevy, GMC, Buick, or Cadillac running at its best.
Connect with us
