no
Yes, all duramax's have glow plugs.
Depends on which diesel you are talking about. A 1993 or earlier the glow plugs located outside edge of the heads below the valve cover. 1994 through early 2003, the 7.3 turbo diesel engines the glow plugs are located in the heads but under the valve cover. You will need to remove the valve cover to retrieve the glow plugs. Basically the non turbo diesels have the glow plugs outside edge of the heads. In all turbo diesels you have to remove the valve covers to get to the glow plugs.
The best answer is to follow the recommendations for maintenance in your particular car's owner's manual. A rule of thumb is every 30,000 miles for standard plugs and 60,000 for platinum or other precious metal plugs. Don't forget the ignition system's secondary wiring. Worn plugs and damaged wires can cause ignition coils and other ignition components to fail prematurely.
Undo the bolts on the top of the glow plugs that's securing the rail in place. The with that removed take the glow plugs out deep docket and a longish bar is a good idea as then you get out the way of all the pipes and wires ect
sounds like the glow plugs need replacing
Try checking all connections and the solenoid.
Unscrew and remove the wires from the top of all the glow plugs. Connect a lamp between the battery positive terminal and the glow plug top connection. If the glow plug is good the lamp will light. Alternatively, if you have a meter available, set to the ohms range and connect between the top connector of the glow plug and the engine block. If the plugs are good the resistances of all the plugs should be a very low and approximately the same. A high resistance plug is a dead plug.
Not all of the glow plugs are working
Diesel Models: Normally a problem with faulty glow plugs. The starter motor will appear to turn normally. Its possible that not all the glow plugs are faulty, and after several attempts the engine will start.
I have diesel 86' 524td that I changed the glow plugs on. They run the length of the engine kind of like spark plugs. There are (is) probably six of them. They are smaller than spark plugs and have a wire on top of each one. Be carefull, the wire is held on by a small nut. Take that off first, then the glow plug. For the plug itself you'll need a deep socket like a spark plug socket only smaller. The ones in the front will be easier than the back because of wiring or accessories. Here's a tip from experience. Replace ALL of them at once. It will save you aggrevation in the long run from changing one or two now and later. Good luck. rich c.
connect the ground end of a test light to the pos. side of the battery. now un hook the wires from the glow plugs or unbolt the terminals. after u have done this touch the tester to the glow plug terminals if it lights up it is good do this to all of them if the tester doesn't light up the glow plug is bad.
need to bleed the lines all the way to the fuel filter