2002 Duramax with high miles, 335k. Truck was running fine then on the way out of the driveway heard a loud "pop", engine lost power but continued to run. Now, I hear a turbo whine I didnt hear before when the RPM's are up a bit, the truck will only start with starting fluid, and won't run over about 45mph. Any ideas where I should start looking?

SOURCE: Chevrolet 2500 Not Running, May Be Fuel Filter Sensor

That red wire is only for the fuel heater.will not cause a no start.try pumping the primer pump on top of the fuel flter hsg. but first open the bleed screw,which is black plastic also located on the top.this will eliminate any trapped air that might have entered the fuel intake system.if the pump does not get firmer and harder to push, then you have a leak in the fuel supply lines or the ck valves in the fuel filter hsg or stuck open. Still no start have it scanned to ck fuel pressure while cranking.it should be close to 5000 lbs

SOURCE: 03 Duramax Allison Transmission. Sometimes when

Sounds like an igition switch to me, with the discription you are giving.

SOURCE: 1994 chev truck 6.5 turbo diesel with long hard

There is a cold start solonoid in the injection pump on the 92&93's. this will cause a hard start, and run poorly till warms up. It does something with the presure in pump which advances it.

SOURCE: 2001 Duramax 6.6 Turbo wont start

does the starer click when u turn the key,u could have a bad ground from the batt to the body

SOURCE: I have a 2004 Chevy

Thanks for choosing Fixya and welcome to the site. It sounds like you have low compression in the engine. First, let me ask this. Is your check engine light on?