2003 Chevy silverado 2500!hd reduce engine speed

SOURCE: 2003 chevy malibu that cranks but won't run

If you haven't done so already, have the cam and crank shaft position sensors checked, or replaced, You have replaced everything else.

SOURCE: chevy silverado 2500HD won't start after changing fuel filter

Fuel Pump may have took a poo.. ???

SOURCE: 1998 chevy s10 won't start, engine cranks but it won't turn over.

replaced your fuel pump and when you buy it make sure to replace the oil sending sensor on the fuel pump it comes with a replacement when you purchase a new fuel pump

SOURCE: 2007 chevy silverado 2500 hd duramax shut down

mo me it sounds like low fuel volume i would check my lift pump

SOURCE: how about advise on a 2003 chevy silverado 2500 hd

The instructions are below. Also, there will be a diagram for the routing.

1. Before you begin, visually confirm the belt routing to the engine compartment label (if present) or to the appropriate diagram in this section (if the label is not present). If you cannot make a match (perhaps it is not the original motor for this vehicle), scribble your own diagram before proceeding.
   
2. Disconnect the negative battery cable for safety.
   
3. Install the appropriate sized breaker bar, wrench, or socket to the tensioner arm or pulley, as applicable.
   
4. Rotate the tensioner to the left (counterclockwise) and slip the belt from the tensioner pulley.
   
5. Once the belt is free from the tensioner, CAREFULLY rotate the tensioner back into position. DO NOT allow the tensioner to suddenly snap into place or damage could occur to the assembly.
   
6. Slip the belt from the remaining pulleys (this can get difficult is there is little room between the radiator/fan assembly and the accessory pulleys. Work slowly and be patient.
   
7. Once the belt is free, remove it from the engine compartment.
   

1. Route the belt over all the pulleys except the water pump and/or the tensioner. Refer to the routing illustration that you identified as a match before beginning.
   
2. Rotate the tensioner pulley to the left (counterclockwise) and hold it while you finish slipping the belt into position. Slowly allow the tensioner into contact with the belt.
   
3. Check to see if the correct V-groove tracking is around each pulley.