Looking for the best Dexron ULV transmission fluid? We ranked the top five ULV fluids for GM 10-speed transmissions, comparing TRIAX, ACDelco, Valvoline, AMSOIL, and Hot Shot's Secret using real viscosity data, technical specifications, and OEM compatibility.

The LM2 and LZ0 3.0L Duramax engines are factory-filled with dexosD 0W-20, but is a move to 0W-30 really unsafe? We compare bearing clearances, real-world oil temperatures reaching 240-260°F, GM's 0W-20 to 0W-40 transition in the L87 V8, bearing engineering principles, and used oil analysis results showing reduced wear metals with a thicker oil to examine both sides of the debate.

The 3.0 Duramax maintenance schedule calls for oil changes up to 7,500 miles, fuel filter replacement at 30,000 miles, and transfer case service every 50,000 miles based on GM HD guidance.

The CSF 3900 Radiator for the 3.0 Duramax diesel claims an upgraded 31mm heavy-duty core compared to the factory 28mm radiator, but does thicker automatically mean better cooling? In this detailed side-by-side comparison, we break down the real differences between the OEM radiator and the CSF replacement, including fin density, coolant capacity, airflow characteristics, tank crimp design, and overall construction quality.

They look identical at first glance, but swapping the wrong glow plug on your 3.0 Duramax can lead to serious — even engine-destroying — problems. Discover the key differences between LM2 (73G) and LZ0 (72G) glow plugs, including voltage requirements, control module changes, fragility warnings, proper testing methods, and must-follow installation tips to keep your diesel running strong.

GM has quietly brought back a feature that a lot of truck owners asked for — the Trailer Light Test inside the myChevrolet and myGMC mobile apps. If you tow regularly, this is one of those small updates that actually makes life easier. What Is the Trailer Light Test? The Trailer Light Test allows you to cycle your trailer lights directly from your phone , so you can stand behind the trailer and confirm everything is working — without climbing in and out of the cab. The tes

March 12, 2025 – By Greg Nelson Originally Published: July 2, 2023 | Updated: March 12, 2025 Reading Time: 10 minutes The 3.0L Duramax...