Is the Duramax LB7 a reliable motor?

Overall, the LB7 is a very reliable and efficient engine with exception to the injectors faults, but beyond that, the truck will only need basic maintenance and last for several hundred thousand miles.

How many miles will a LB7 Duramax last?

A poorly-maintained engine can quickly fall into disrepair before it even reaches the 100,000-mile mark while a well-maintained Duramax pickup truck should last 400,000 or even 500,000 miles.

What is so special about the LB7 Duramax?

The inaugural Duramax, RPO code LB7, would bring the first aluminum cylinder heads to the diesel pickup segment, introduce the same market to common-rail injection and also make its power in a much cleaner, quieter manner than the competition (i.e. the 7.3L Power Stroke and the 24-valve 5.9L Cummins).

What causes a Duramax to surge?

The most common culprit is a tiny air leak in the fuel system somewhere. Inspect the flexable fuel lines from the tank to the fuel pump, if there is even the tinest air leak, surging, hard starting, and infrequently small drops of fuel on the driveway happen.

What year Duramax is most reliable?

Any generation duramax will pull a 3 horse trailer handily. They all have their own quirks and issues that can be resolved, and once they are, you’ve got a reliable, strong truck for many miles. Most will say the 06-07 LBZ model to be the most desirable and reliable platform.

Is LLY better than LB7?

Between the 3 LB7s I have a work and my LLY, the LB7 seems to be more ‘sluggish’, a bit less power and louder, BUT seem to be more of a consistant increase in power through the RPMs. My LLY, is much quieter and smoother. The power is dormant right off idle until the turbo spools, then it takes off like a rocket.

Is 100k high mileage for a diesel?

According to Prosource Diesel, anything over 350,000-miles is considered high mileage for a used diesel pickup with a Cummins or Duramax engine under its hood. Anything over 350,000-miles is also regarded as high mileage for a Powerstroke diesel engine.

What is the most reliable Duramax?

Released in 2017, the L5P is the latest a greatest version of the Duramax. It is substantially more durable than previous Duramax models and features an impressive 445 HP and 910 lb-ft of torque. The L5P replaced the LML in Chevy Silverado pickup trucks.

Why does my Duramax high idle?

A dealer may encounter a customer concern of an intermittent high idle. High idles may be commanded by the ECM for certain battery charging electrical loads or diesel particulate filter (DPF) cleaning processes. These idle up speeds may occur with no input from the customer.

What is the ice pick fix Duramax?

The “Ice Pick” fix— you use an icepick to press on the injector terminal connector through to the terminal. It raises a small dimple inside the terminal to make better contact with the injector terminal. The terminals are weak and loose their tension.

What is the most sought after Duramax?

Perhaps the most desired of all Duramax models are the ’06-’07 Classic body style trucks.

What are common problems with Duramax diesel engines?

This seems to be inherent of the factory water pump design. Overheating. Overheating issues with the Duramax diesel seems to be a hit-or-miss problem; some owners experience it, while others never will. Regardless, it’s more common with the Duramax than other engines.

Does the LB7 have EGR?

If its a federal emissions truck with a LB7 it never had egr. Only california emission lb7 trucks had egr on them. Federal emission trucks with lb7s never did. Is it a California truck originally?

Why do LB7 injectors fail?

It could be that you have 1 or more bad injectors. Injector failure on the LB7 Duramax powered trucks is usually caused by either bad fuel or the use of power adders that increase rail pressure. Bad fuel can cause injector failure immediately, pressure boxes will cause failure over time.

Which duramax is best?

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Is the Duramax LB7 a reliable motor? Overall, the LB7 is a very reliable and efficient engine with exception to the injectors faults, but beyond that, the truck will only need basic maintenance and last for several hundred thousand miles. How many miles will a LB7 Duramax last? A poorly-maintained engine can quickly fall into…