2027 Silverado V8s Lose the Dipstick and Move to Thicker Oil: What Owners Need to Know
Pop the hood on a 2027 Silverado with one of the new V8s and something will be missing. The 5.7-liter and 6.6-liter engines no longer have an oil dipstick. On top of that, the owner’s manual quietly changes the 2027 Silverado oil recommendation for every gas engine in the lineup.
This one matters to us here at GT: Garage Talk® directly. Our 2027 Silverado Custom Trail Boss has the 5.7-liter V8, so we will be checking oil the new way from day one.
How to Check Oil Without a Dipstick
The manual is blunt: “Your vehicle is not equipped with an engine oil dipstick.” Instead, owners of the 5.7-liter and 6.6-liter V8s check the level through the Vehicle Status page on the infotainment screen.
The process flips the old routine on its head. With a dipstick, you check a cool engine that has been off for a while. With the new V8s, however, the manual says to park on level ground with the engine idling at normal operating temperature. If the level falls outside the MIN and MAX range, the indicator turns red. When it is low, the screen shows how much oil to add.
Chevrolet still recommends checking the oil every 400 miles, especially before a long trip. The screen just makes that easier to do from the driver’s seat.
Why GM Dropped the Dipstick
Our friend Tim Esterdahl at Pickup Truck + SUV Talk asked GM that exact question at its powertrain event in Flint, Michigan. As he reported in his deep dive on the new GM V8s, Randy Dufresne, design system engineer for the Gen 6 Small Block, pointed to packaging. In short, the new port injection hardware left no practical way to route a dipstick tube.
GM replaced both the dipstick and the old low-oil switch with a sensor that reads the oil level and warns when it is low. The new V8s also get a continuously variable displacement oil pump and an oil cooler built into the oil pan.
Not every 2027 Silverado loses the stick, though. The 2.7-liter TurboMax and the 3.0-liter Duramax diesel still have a traditional dipstick under the hood.
2027 Silverado Oil Recommendations by Engine
Here is the bigger surprise. Every gas engine in the 2027 Silverado, including the 2.7-liter TurboMax, now calls for full synthetic SAE 0W-30 oil that meets GM’s dexos1 specification. The outgoing 5.3-liter and 6.2-liter V8s called for thinner 0W-20. Meanwhile, the Duramax diesel sticks with 0W-20 that meets the dexosD specification.
| Engine | Oil spec | Viscosity | Capacity with filter | Dipstick |
|---|---|---|---|---|
| 2.7-liter TurboMax (L4B) | dexos1 full synthetic | 0W-30 | 6.0 qt | Yes |
| 5.7-liter V8 (L76) | dexos1 full synthetic | 0W-30 | 8.0 qt | No |
| 6.6-liter V8 (L78) | dexos1 full synthetic | 0W-30 | 8.0 qt | No |
| 3.0-liter Duramax (LZ0) | dexosD | 0W-20 | 8.0 qt | Yes |
So why go thicker? Dufresne told Pickup Truck + SUV Talk that the 30-weight oil gives the bearings a better oil film while still meeting GM’s fuel consumption targets.
The manual also warns against adding anything to the oil and says engine flushes are not recommended. Using an oil that does not meet the recommendation can cause engine damage that is not covered by the warranty. In other words, check the bottle for the dexos1 logo and the 0W-30 grade.
What a Shell Engineer Says About Oil Weight
If you are wondering whether thicker automatically means better, Tim recently visited Shell’s technical center in Houston and asked that question from the other direction. In his story on whether lightweight oils are too thin, Matt Urbanak, Shell Rotella’s technology manager for North America, explained that thinner oils lean on stronger additive packages to pass the same engine tests as heavier grades.
The takeaway is that the viscosity number tells only part of the story. A finished oil’s base stock, additives, and testing all matter. That is also why the best advice is the simplest one: start with what the manufacturer specifies for your engine. For the 2027 Silverado gas engines, that is now dexos1 0W-30.
What This Means for Our Long-Term Silverado
For years, checking the oil has been a garage ritual. Now it is a screen tap, and we are curious how that feels after a full year. We plan to compare the screen reading with what we see at each oil change and track how much oil the 5.7-liter uses along the way.
First, though, the truck has to get through its 500-mile break-in. You can also read about GM’s engine exchange program for the new V8s.
Subscribe to GT: Garage Talk on YouTube and follow our dedicated 2027 Silverado playlist to see how it goes. You can also sign up for our newsletter using the form at the bottom of this page.
