This GM 3.0L Duramax LM2 Hit 140K Miles—Then a Known Issue Caused Major Engine Damage

GM rolled out the 3.0-liter Duramax LM2 as its answer for folks who wanted diesel power in a half-ton truck or SUV, but didn’t want to go full heavy-duty. You’ll find it in models like the GMC Sierra 1500. With 277 horsepower and 460 lb-ft of torque, it promised plenty of muscle for towing, plus ...

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