The 2027 Silverado Duramax delivers the highest MPG, but is it the cheapest to fuel? We calculate the cost of driving every available V8 and diesel configuration for 50,000 miles.

The 2027 Silverado 3.0 Duramax receives lower fuel economy ratings, continuing an eight-year decline. We compare the LM2 and LZ0 from 2020 through 2027 and examine GM's explanation.

GM has updated its 3.0 Duramax coolant control valve failure bulletin to include 2027 models. We examine the LM2 and LZ0 part-number history, second-generation replacement valve, ECM programming requirements, and common failure patterns.

PPE has introduced a larger 5-micron MicroPure XR oil filter for the 3.0L Duramax. The new design features 295 square inches of filtration media and joins the existing 10-micron filter. Our first installation also revealed an important oil pan clearance consideration.

GM's latest 2027 Silverado and Sierra service bulletin confirms an approximately two-gallon increase in Duramax DEF capacity, a 34-gallon optional fuel tank, and additional mechanical changes across the next-generation truck lineup.

Edge Products has introduced the new CTS4 monitor with a larger 5.5-inch touchscreen, 3.4 times the processing power, faster startup times and improved gauge responsiveness. Here's what's changed and what Duramax owners should know.

P2C7A is a frequent trouble code on the LM2 and LZ0 Duramax. GM's diagnostic guidance covers several possible causes, while firsthand repair experience points to recurring problems with exhaust clamps, backpressure valve welds and DEF injector performance.

GM has updated its 3.0L Duramax turbocharger replacement bulletin to specify the same oil feed pipe found on the 2027 LZ0. Could the revised component address concerns about turbocharger oil flow?

GM has finally identified specific build dates in its 3.0 Duramax LZ0 thrust bearing bulletin. The October 13, 2026 revision lists vehicles built between May 1 and September 1, 2025, giving owners a long-awaited production window to examine.

DuramaxNews has uncovered three surprising details in the 2027 Chevy Silverado 1500 owner's manual: a possible increase to 8 quarts of oil for the 3.0L Duramax diesel, revised DEF speed restrictions that could limit trucks to 45 mph instead of 5 mph, and references to a potential new key card system. Here's what we discovered and what it could mean for future Silverado owners.

GM has updated a service bulletin covering exhaust odors inside 2025–2026 Silverado and Sierra HD trucks equipped with the L5P Duramax. A leaking EGR cooler bypass valve shaft seal may be responsible, and technicians may also encounter DTC P2463.

GM has released a new bulletin clarifying whether red-dyed diesel fuel affects Duramax warranty coverage. Learn the differences between on-road and off-road diesel, No. 1 and No. 2 diesel, winterized fuel, sulfur content, and what to check before filling your truck.

The 2027 3.0L Duramax is getting more than a redesigned piston. Our early look at the Gen 2 LZ0 reveals changes to the turbocharger, fuel system, thrust bearings, charge air cooler, DEF system, electronics and more.

GM has identified a potential ECM software anomaly affecting 2025 full-size SUVs equipped with the 3.0L LZ0 Duramax. The new bulletin addresses nine diagnostic trouble codes, including several related to fuel pressure regulation, and directs technicians to check for calibration updates before continuing conventional diagnostics.

GM's diesel oil specifications have evolved from dexos2 to dexos D, but the change involves much more than viscosity. Here's how the specifications differ, why modern diesel engines require increasingly specialized lubricants, and what upcoming changes could tell us about the future of diesel engine oil.