GM is allocating available oil supplies to dealers as a global Group III base-oil shortage puts pressure on low-viscosity synthetic oils. Here's what Duramax owners — including those using AMSOIL, Schaeffer's and other specialty oils — should know.

Could upcoming EPA emissions requirements have influenced the updated 2027 3.0L Duramax LZ0? We examine the new piston, turbo vane, NOx sensor and DEF-related changes—and what they may reveal about GM’s emissions strategy.

GM bulletin #PIE0932 confirms the automaker is investigating an injector-related check-engine light and possible misfire condition affecting some 2026 vehicles equipped with the 3.0L LZ0 Duramax diesel. A root cause and standardized repair have not yet been announced.

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.

GM has released OTA update 661.51 for Silverado and Sierra trucks. The Y181 software update includes HVAC fixes, TPMS improvements, key detection updates, pedestrian alert changes, improved starting reliability, reduced check engine light activation, turbo diagnostic improvements, and power running board reliability enhancements.

The LZ0 Duramax is GM's second-generation 3.0L inline-six diesel engine, producing 305 horsepower and 495 lb-ft of torque. This complete guide covers specifications, steel pistons, cooling system updates, reliability improvements, and every major difference between the LZ0 and LM2 engines.

GM has updated its official oil consumption bulletin for the 3.0L Duramax diesel engine, now adding the newer LZ0 platform alongside the LM2. The bulletin explains what oil consumption is considered normal, how towing affects oil usage, and why proper oil level checking procedures matter for diesel truck owners.

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.

The EPA has rescinded the 2009 Endangerment Finding, but what does that actually mean for diesel owners? Here’s a clear breakdown of how the change affects greenhouse gases, the Clean Air Act, and 3.0 Duramax emissions systems.

GM Bulletin 26-NA-033 explains ECM calibration updates for 2025 LZ0 Duramax SUVs addressing MIL warnings and multiple DTCs caused by software anomalies.