99 silverado start and dies when cold

i have 99 siverado 3/4 4x4 when cold in mornings it starts then dies and starts and dies , then leave it for a while and will start . i have tried fuel regulator , computer, crank sensor , wire connections in dash / collum all it does is cost me more money and no fix at first it would not start below 30 degress now it wont start at 30 or 35 degress .have had it checked out by 6 mechanics with no results , they say every thing is ok or it will not fail at shops , checked fuel pump, throttle body , plugs , air flow sensor etc all ok . i need help bad it at gm every other week it seems or other shops . it has beeen going on since last winter , but only happens when cold out. please help i am sick of fixing with no results , ready to get ford or dodge.mike

Mike,
When you start the truck will it start and not idle?
Will it not start at all?
Will it start and misfire?
Does the service engine light come on and if so what are the codes?

ready to get F**d or D*d*e :chair:

not a vacum leak , the truck will start and then die like it run out of fuel and do this untill the battery dies. 68 camaro

not a vacum leak , the truck will start and then die like it run out of fuel and do this untill the battery dies. 68 camaro

Does the Security light come on and flash?
Has anyone checked the coolant temperature sensor to see if it is reading the correct temperature?
Has this bulletin been performed ?
Increased Accelerator Pedal Effort, Idle Instability (Clean Throttle Body and Adjust Blade) #02-06-04-054B - (03/17/2003)
This has helped some start/ stall complaints.

Does the Security light come on and flash?
Has anyone checked the coolant temperature sensor to see if it is reading the correct temperature?
Has this bulletin been performed ?
Increased Accelerator Pedal Effort, Idle Instability (Clean Throttle Body and Adjust Blade) #02-06-04-054B - (03/17/2003)
This has helped some start/ stall complaints.

hi merlin dont know if any one checked coolant sensor . some times the security light will come on and stay on untill shut off truck but does not throw code per gm garage also the throttle body was cleaned . they think it now is the passlock in coluum about 125.oo plus labor dont know if should put anymore money in truck its becoming a money pit , also would like to know why the sending unit in tanks go bad all the time and gm will not recall. thanks mike

If the security light comes on, there is a code stored...have they done a diagnostic circuit check with the Tech2?
This will list all the modules that are communicating on the class 2 circuit and if they have a code stored.
Sounds like you may have a security problem.