The 2008 GMC Sierra 1500 generally uses 5W-30 motor oil for most engines. The exact specification depends on the installed engine (such as the 4.3L V6, 4.8L V8, or 5.3L V8), so it’s important to verify the correct oil type from the owner’s manual or the under-hood label.
Oil specifications by engine family
The following guidelines cover the common engine options found in the 2008 Sierra 1500. Always confirm with the manual, as GM updated recommendations in different markets or for severe service.
- 4.3L V6 engine: 5W-30 motor oil with API service SM or higher recommended. Conventional or synthetic oil may be used; synthetic offers better cold-start protection.
- 4.8L V8 engine: 5W-30 motor oil with API SM or higher; synthetic blends acceptable for improved protection and durability.
- 5.3L V8 engine: 5W-30 motor oil with API SM or higher; Dexos1 is not required for this year, though synthetic oils are acceptable.
- 6.0L V8 engine (if installed): 5W-30 motor oil with API SM or higher; check the manual for any engine-specific notes.
Concluding note: For the 2008 Sierra 1500, 5W-30 is the standard recommendation across most engine choices, with valid exceptions only if GM specifies a different viscosity for certain climates or service conditions. Always refer to the original owner's manual and the under-hood sticker for the exact specification.
Practical tips for oil changes
When performing oil changes, use the correct filter and ensure you meet the engine’s oil capacity. Typical capacities range from about 5 quarts for the V6 to 6–7 quarts for the V8 configurations, depending on the engine and filter. Avoid over-tightening the drain plug and replace the drain plug gasket if present.
Why this matters
Using the correct oil viscosity and specification helps maintain engine lubrication, performance, and longevity, especially in extreme temperatures. Using the wrong oil can affect lubrication and warranty compliance.
Summary
In short, most 2008 GMC Sierra 1500 models take 5W-30 engine oil, with the exact requirement depending on the engine installed. Verify the engine type and consult the owner's manual for the precise specification and service intervals. Both conventional and synthetic oils are acceptable, and synthetic blends offer extra protection if you prefer them.
What type of oil should I put in my 2008 GMC Sierra 1500?
GMC Sierra 1500 Oil Type: Recommended
For gasoline engines: SAE 5W-30 Dexos1 full synthetic oil, with an alternative of 0W-30 for colder climates. For Duramax turbodiesel engines, SAE 0W-20 DexosD diesel engine oil provides enhanced protection for diesel engine configurations.
What kind of oil does a 2008 GMC Sierra 5.3 take?
SAE 5W-30
These trucks generally prefer SAE 5W-30.
Can I put 5W-30 in my GMC Sierra?
The GMC Sierra 1500 oil type depends on the kind of engine you have. For a gasoline engine, we recommend SAE 5W-30 Dexos1 full synthetic oil. If you want protection for really low temperatures, consider 0W-30 oil. If you've got a Duramax turbo diesel engine, use SAE 0W-20 DexosD diesel engine oil.
How many quarts of oil for a 2008 5.3 GMC Sierra 1500?
6 quarts
Engine Oil
Capacity: 6 quarts (with filter). After refill check oil level.