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LM2 vs LZ0 Glow Plugs: Critical Differences You Must Know Before Replacing Them on Your 3.0 Duramax

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.

Here's why you may get P2463 Check Engine Light on 2026 3.0L Duramax Trucks and SUVs

GM has updated Engineering Information bulletin PIE0883A for 2026 3.0L Duramax (3MAX) trucks and SUVs, closing its P2463 investigation and directing technicians to inspect the turbo outlet–to–resonator connection for possible airflow issues behind the check engine light.

GM Issues New Calibration Bulletin 26‑NA‑090 for 3.0L LZ0 Duramax Pickups

The latest GM service bulletin # 26-NA-090 , released on March 12, 2026 , provides key information on calibration releases for the 3.0L Duramax diesel (LZ0) in 2025 pickup trucks. This is an informational bulletin guiding dealers on available ECM (Engine Control Module) software updates to address illuminated Malfunction Indicator Lamp (MIL) concerns. Affected Vehicles Chevrolet Silverado 1500 (2025 MY) with 3.0L Diesel (LZ0), all transmissions GMC Sierra 1500 (2025 MY)

6.6L Duramax Diesel Engine

New GM Emissions Recall N242438500: 2024 L5P Duramax SCR Fault Detection

General Motors has launched a new emissions recall that affects certain 2024 Chevrolet Silverado HD and GMC Sierra HD trucks equipped with the 6.6L L5P Duramax. Recall ID: N242438500 Title: ECM OBD – Selective Catalyst Reduction (SCR) Fault Detection Release Date: November 2025 Applies To: 2024 Chevrolet Silverado 2500HD / 3500HD (L5P 6.6L Duramax) 2024 GMC Sierra 2500HD / 3500HD (L5P 6.6L Duramax) This is a voluntary emissions recall focused on the software that monitors

EPA Issues Guidance to Fix DEF Derates: What the New Rule Means for Your 3.0 Duramax

If you’ve been driving your 3.0 Duramax-equipped truck or SUV, you're likely familiar with the frustration of a Diesel Exhaust Fluid...

The Devastating Consequences of Fuel Contamination in Your Duramax Diesel: DEF vs. Gasoline

For Duramax diesel owners, the fuel system is the lifeline of your vehicle’s performance, delivering the power and efficiency you rely...

3.0L Duramax Diesel Engine

GM Redesigns the 3.0 Duramax Engine Oil Pan (LM2) (LZ0)

GM has redesigned the 3.0 Duramax (LM2) (LZ0) engine oil pan, introducing a relocated drain plug, revised sump geometry, and a new oil pickup tube. The updated design improves oil drainage during service and refines internal oil control, while maintaining overall capacity. Here’s what changed, why it matters, and what owners need to know about compatibility before ordering parts.

LEGAL TO DELETE? NO. But, EPA Rescinds the 2009 Endangerment Finding: What It Actually Means for 3.0 Duramax Owners

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.

LZ0 Gets Calibration Updates For 2025 SUV's - 3.0 Duramax Diesel

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

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