2007 gmc duramax issues

images 2007 gmc duramax issues

On the plus side, the LLY featured the largest turbo offered on any Duramax engine, and it utilizes variable geometry technology for optimum spool up, mid-range and top-end power. Go to newsstand. The Duramax became more complicated for to meet even stricter emissions. Fuel economy suffered severely, caused by the adoption of a diesel particulate filter and active regeneration. Rather, the high pressure fuel pump injection pump is responsible for vacuuming fuel from the tank.

  • Duramax Buyer's Guide How to Pick the Best GM Diesel DrivingLine
  • Commons L Duramax Problems & Concerns
  • Duramax Buyers Guide

  • Common problems typically associated with the L Duramax, ranging from LB7 injector issues to LML NOx sensor failures, fuel starvation and priming.

    Duramax Buyer's Guide How to Pick the Best GM Diesel DrivingLine

    How to buy a used Duramax, including the common problems associated with certain model years and the - GMC Sierra, Chevrolet Silverado. Find out which of the late-model GMC and Chevy trucks is the one to have.

    images 2007 gmc duramax issues

    and the pre-emissions versions ( to ) are highly sought after. Instead, this generation Duramax is known for overheating issues, namely.
    Some owners have also suggested that turning the engine off and cycling the key to the on position several times will take the transmission out of limp mode. Horsepower and torque peaked for the LB7 ingenerating hp and lb-ft.

    Commons L Duramax Problems & Concerns

    Common-Rail Cummins. However, like any engine or any complex mechanism for that matterthe Duramax engine and Allison transmission have some common problems inherent to their design.

    Video: 2007 gmc duramax issues THE DURAMAX ISSUES CONTINUE...

    The goal of this engine was to meet strict emissions regulations, while offering up a small performance increase as collateral. The associated trouble codes will usually reveal which injector s are affected and will relate to an "open circuit" condition.

    images 2007 gmc duramax issues
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    By far and large, the most common problem was the reoccurring failure of one of the systems two NOx sensors.

    The 6. It's great to have such a fail safe, but in many instances the limp mode is activated when it's not entirely necessary. It usually occurs under heavy load such as towing, down shifting to pass, etcand is extremely common in tuned trucks even a mild performance increase can cause enough slippage to trigger limp mode. Injector Failure Premature injector failure was a critical problem for the to model year Duramax LB7.

    In reality, it's less than ideal for many situations.

    Not specific to one version of Duramax in particular (ex: LB7, LLY, LBZ, of miles without any major issues, the CP3 flows roughly percent more fuel but we' ve also seen it occur on bone-stock Chevy and GMC HDs.

    bought a 07 silverado classic crewcab, have miles on it, fuel milage has seemed to be mpg at 65 mph right since new, have.

    If you have a Duramax LB7 diesel pickup or are looking to buy one, here are some common issues and problems we have run.
    GM identified the problem and has reprogrammed the glow plug module to eliminate this risk.

    When the Allison transmission senses an abnormal amount of slip in the transmission, it enters limp mode.

    images 2007 gmc duramax issues

    Rather, the high pressure fuel pump injection pump is responsible for vacuuming fuel from the tank. Some owners have also suggested that turning the engine off and cycling the key to the on position several times will take the transmission out of limp mode.

    Duramax Buyers Guide

    In addition, high-mile versions are prone to popping head gaskets. Go to newsstand.

    images 2007 gmc duramax issues
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    While in limp mode, the transmission will lock in 3rd gear, the torque converter will remain unlocked, and the transmission will not be able to operate in reverse.

    The Duramax LML was introduced for the model year featuring the most sophisticated emissions system yet.

    Fair warning, these trucks generally hold their value better than Ford and even Dodge trucks of the same vintage, and the pre-emissions versions to are highly sought after. The system relies on various sensors plumbed into the exhaust system in order to accurately control the injection of DEF into the catalyst. Best Year s : Any year, as long as all 8 injectors have been replaced with genuine Bosch re-man units.

    2 thoughts on “2007 gmc duramax issues

    1. This can be contributed to the fuel filter housing design and the fact that the Duramax does not use a lift pump. When the Duramax was first introduced, many were skeptical about the aluminum cylinder heads, but there is no need to worry.