I just bought a 1997 z-71 from a 'friend' with the 6.5, auto tranny. its been sitting in his drive for about 6 months because he could not get it to start. He changed the glow plugs & relay, fuel pump(rail mount) and relay, mounted new drive module on firewall, new fuel filter, air filter, new starter and batteries with no luck. I started working on it today, eliminating possibilities, bleeding system, etc. I tried to start it with silicone spray/starting fluid but no luck at all. shouldn't this thing at least fire off on the starting fluid, unless there is something mechanically wrong, like jumped timing or such. it does not free wheel when trying to start like it would if the timing chain were broke; truck has 190,000 miles, so I guess it could have slipped timing?? BTW, he just had a newly rebuilt tranny installed 4 miles before it quit, when it quit on him, he had parked in the drive that night , came out the next morning, wouldnt start and its been there since. Any ideas on what to look for next? UPDATE- loosened line from an injector, turned engine over several times, no fuel from injector line. BAD INJECTOR PUMP?