it wont turn over

I have the 8.1L in my chevy and i was wondering if it is even possible for me to remove the gas motor in my truck and replace it with a diesel motor without replacing my Allison transmission too.

Only happen now and then. Everything comes on when you turn the key but when you click the key over to start the engine nothing happens. There doesn't seem to be any certain time or day or reason for the problem.

I just replaced the thermostats and it still does it at 2000 or more RPM. 2000 RPMs and lover it will run normal, 185deg.

My truck says odometer error on it. I hooked up the computer to check the diagnostics on it and it said failed to read. So that didn't help either. Where it says fuel used is correct and the oil life reset. I just can't read my mileage. The speedometer still works too. I looked on a bunch of sites and most think it's the instrument cluster but I want to be sure. Also I need to get it fixed as cheap as possible. It only has 18k miles on it. Please help!

I took the dash apart and checked all of the connections and there were no loose or corroded wires

The lights flicker bright to dim the battery light came on but I checked the battery and its charging normal. I have heard about the ECM causing issues like this but I don't know what to test on it. The truck keeps clearing the codes before I can get in to see what they are. My engine light came on and by the time I got my scan tool it was gone and no history codes. After the truck cleared codes it ran great no flicker but this morning its back but no codes or engine light just the battery light. Any help would be appreciated!

Shift immobilizer

Pedal goes to the floor no brakes at all resivour is bone dry.

And still no lights!!! Any suggestions would greatly b appreciated

Changed starter, battery fully charged, all dash lights illuminated normally. Installed the almost $300 part worked for two months. I got the same results. What else can I do to fix it.

We went to turn with signal & aping
breaks all went out

The Signal lights 7 Break lights go out when the break is applied?

when it happens i lose engin power and have to pull over and turn the engine off for about a minute the restart the engine

Put..injectors...stop..stared back after 300 hundred miles..what going on.

1 tap on the gas peddle stops it. Sounds like it could be the fan? Blower.

The engine continues running after turning the key off. (it's not dieseling, it's continuing to run smoothly) It runs for about 20 - 40 seconds.

Is there an easy fix?

This has happened for the last ten years i just go by miles most the time but when you are driving it tells you the correct amount now and then. sometimes when the gage reads empty i can wiggle truck side to side and the gage starts working for a short time.

truck dies when throttle is released.

Wires broken at 2nd plug from camshaft sensor it has 5 wires ,I need to know a part # for plug I have a pic