Recommended Service – Quirk Commercial Trucks

Keep Up with Recommended Service

Routine service is key to keeping your fleet running strong. Below, we’ve highlighted recommended maintenance schedules for each manufacturer, so whether you drive Chevy or a GMC you’ll find guidance on major service intervals for every engine type. No matter what you’re driving, we’ve got you covered.

Chevy & GMC

6.0L V8 Vortec

Chevy/GMC 3500 Models:

Engine oil and filter replacement every 5,000–7,500 miles
Tire rotation every other oil change or when tire wear is noted
Inspect brake pads and rotors at every service interval
Replace engine air filter every 15,000 miles or as needed
Replace transmission filter and fluid every 45,000 miles
Replace transfer case fluid every 30,000 miles

6.6L V8 Duramax

Chevy/GMC 3500 Models:

Engine oil and filter replacement every 5,000–10,000 miles
Tire rotation every other oil change or when tire wear is noted
Inspect brake pads and rotors at every service interval
Replace engine air filter every 15,000 miles or as needed
Replace transmission filter and fluid every 45,000 miles
Replace transfer case fluid every 30,000 miles

5.2L I4 Isuzu Diesel

4500 to 6500HD/XD Models:

Engine oil and filter replacement every 5,000–10,000 miles
Tire rotation every other oil change or when tire wear is noted
Inspect brake pads and rotors at every service interval
Replace engine and fuel/water separator filters every 15,000 miles
Replace transmission fluid and filter every 30,000 miles
Replace engine coolant every 2 years or 60,000 miles

3.0L I4 Diesel

Chevy LCF 3500HD:

Engine oil and filter replacement every 5,000–10,000 miles
Tire rotation every other oil change or when tire wear is noted
Inspect brake pads and rotors at every service interval
Replace engine and fuel/water separator filters every 15,000 miles
Replace transmission fluid and filter every 30,000 miles
Replace engine coolant every 2 years or 60,000 miles