The short answer
GM's 2026 Silverado 1500 owner's manual says to change the oil when the Engine Oil Life System calls for it (within 600 miles of the CHANGE ENGINE OIL SOON message) and at least once a year. Tire rotation and the required services are every 7,500 miles.
Other intervals in the manual: cabin air filter every 22,500 miles or 24 months, spark plugs at 60,000 miles on the 2.7L turbo and 97,500 miles on the 5.3L and 6.2L V8s, transfer case fluid at 100,000 miles on 4WD trucks, engine coolant at 150,000 miles or six years, and brake fluid every five years.
The schedule, from the manual
| Item | Interval |
|---|---|
| Oil and filter | When the Engine Oil Life System says; within 600 mi of CHANGE ENGINE OIL SOON; at least once a year. Check level and oil-life % every 7,500 mi |
| Tire rotation and Multi-Point Inspection | Every 7,500 miles (and anytime unusual wear shows up) |
| Engine air filter | When the Engine Air Filter Life System says (REPLACE AT NEXT OIL CHANGE or REPLACE ENGINE AIR FILTER SOON) |
| Cabin (passenger compartment) air filter | Every 22,500 miles or 24 months |
| Spark plugs | 2.7L turbo: every 60,000 mi. 5.3L and 6.2L V8: every 97,500 mi |
| Transfer case fluid (4WD) | Every 100,000 mi (severe service: every 50,000 mi) |
| Automatic transmission fluid and filter | Severe service: every 45,000 mi |
| Hood/body lift struts | Every 100,000 mi or 10 years |
| Engine coolant | Drain and fill at 150,000 mi or six years |
| Brake fluid | Every five years |
| Air-conditioning desiccant | Every seven years |
What GM counts as severe and extreme
The manual's severe service list covers trucks mainly driven in heavy city traffic in hot weather or in hilly or mountainous terrain, trucks that frequently tow a trailer, and trucks used for taxi, police or delivery. It also flags vehicles used for short trips of 4 miles or less. Extreme service is for vehicles mainly driven off-road in four-wheel drive or used in farming, mining, forestry or snow plowing. For extended idling (an hour at the ice-fishing access or a job site), GM counts one hour of idle as 33 miles.
Salt season: underbody flushing
GM's "Special Application Services" list includes having an underbody flushing service performed (see the manual's Exterior Care section). On salted Wisconsin roads that's worth doing through the winter and in spring. For detailing, see .
What the technician checks
Multi-Point Vehicle Inspection items (manual)
10 itemsYour ticks are saved only in this browser. Print or screenshot the list to bring it along.
Booking it in Barron
Swant Graber Motors (Chevrolet, Ram, Dodge), 1690 E Division Ave, Barron, 715-537-5657. Service hours: Monday–Friday, 8:00 a.m.–5:00 p.m. (no Saturday service). Service loaners are available; ask the service department when you book. You don't have to use a dealer to keep your warranty; keep receipts wherever the work is done.
Questions
How often should I change the oil in a 2026 Silverado 1500?
When the Engine Oil Life System says (within 600 miles of the CHANGE ENGINE OIL SOON message) and at least once a year, per GM's owner's manual.
How often should Silverado tires be rotated?
Every 7,500 miles, per the manual, and as soon as possible if you notice unusual wear.
When do Silverado 5.3L spark plugs get replaced?
At 97,500 miles for the 5.3L and 6.2L V8s, and 60,000 miles for the 2.7L turbo, per the 2026 manual.
Does plowing count as severe service on a Silverado?
GM lists snow plowing under extreme service, which can call for more frequent maintenance. Ask our service advisors which items to move up.
Next steps at Swant Graber
Swant Graber Motors (Chevrolet, Ram, Dodge): 1690 E Division Ave, Barron, WI 54812, 715-537-5657. Swant Graber Ford: 1697 E Division Ave, 715-537-9500. Search new or used inventory, or see shop near you for model-by-model answers.
