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About the LB7 / LLY / LBZ / LMM category
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0
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5
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February 10, 2026
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Duramax DEF System Problems: LML and L5P NOx Sensor, SCR Catalyst, and DEF Pump Failures
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1
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40
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July 25, 2026
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CP4 Pump Failure on LML Duramax: Why It Fails, What It Destroys, and How to Protect Your Engine
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1
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16
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July 25, 2026
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LB7 vs LBZ vs LML Duramax: Which Generation to Buy and What to Look For
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0
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13
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April 12, 2026
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Duramax Fuel Filter Maintenance: Intervals, Water in Fuel Warning, and What Filter to Use
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0
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18
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April 12, 2026
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Cold Weather Starting Tips for Duramax Diesel: What Works and What Kills Your Engine
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0
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14
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April 12, 2026
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Boost Leak Diagnosis on Duramax Diesel: Where They Happen and How to Find Them
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0
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84
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April 12, 2026
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Duramax Overheating and High EGT: LLY Coolant Temp Fix and Cooling System Upgrades
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0
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44
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April 12, 2026
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Duramax Glow Plug Replacement: When to Replace, How to Remove Seized Plugs, and What to Buy
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0
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58
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April 12, 2026
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EGR Cooler Failure on LMM and LLY Duramax: Symptoms, Diagnosis, and Replacement
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0
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21
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April 12, 2026
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LB7 Duramax Injector Failure: Symptoms, Diagnosis, and What the Recall Covered (2001–2004)
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0
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16
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April 12, 2026
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