Why is my Duramax LB7 engine overheating?
The second potential cause of overheating on the LB7 is a dirty radiator. Naturally over time the radiator will pick up gunk, dirt, and various other particulates. As this happens, the effectiveness of the radiator decreases which can then result in overheating as well.
What causes a Duramax engine to hard start?
1 Fuel pump loses prime making the engine hard start 2 Low fuel rail engine codes 3 Engine misfires, shaky idling, performance issues
What causes a head gasket to fail on a LB7?
Head gaskets are common failure points on the LB7 for a variety of reasons. As we’ll get into with the next problem, these engines are known to occasionally overheat while towing. The excess heat is thought to cause this problem some of the time. Additionally, higher horsepower LB7’s are more prone to this issue as well.
Are there any problems with the Duramax LB7 diesel?
Since the LB7 is a bit behind the performance curve compared to more modern diesel engines, performance modifications are common. Once you reach the 550rwhp mark, the LB7 is very prone to bending rods and also snapping crankshafts. Additionally, more power requires more fueling and more cooling.
What does it mean when your GMC Sierra won’t start?
The first and most common is when it won’t turn over. This just means that the engine doesn’t move when you turn the key. The second way that your Sierra won’t start is when the engine turns when you engage the starter, but it won’t fire and run on its own.
Why does my Silverado 2500HD no start no crank?
If it helps, usually when this happens, the first time you try to start it, it will start for like a split second and stall out. From there on it just makes a soft clicking at the relays and won’t crank. I usually do not do a lot of repairs to my truck myself.
When did the GMC Sierra have the most problems?
The model years with the most problems reported were 2004 and 2007, with more than 60 complaints each year, followed by 2002, 2003, 2005, and 2010, with more than 40 each year. Of the 112 problems, five different complaints have been reported 90 or more times.
When did the GMC Sierra truck come out?
The GMC Sierra is the fifth-most popular truck in the United States, with more than 230,000 trucks sold in 2019. General Motors introduced the GMC Sierra and its twin, the Chevrolet Silverado, in 1998.