Starting issues 2003 Sonoma

[Lifted03]

2003 GMC sonoma 4.3 4x4 automatic

Having some issues with my truck. Throughout the winter, if the temperature dropped below -10celcius i could guarantee it wouldnt start when i went out.It kind of sounded like it wasnt getting fuel, just cranking. After leaving it a few days it would start right up.
A couple of times in the summer it would try and turn over and start but quickly there after die out (usually only run for a second or two). After leaving it for 15-20 mins it would start and run fine.
A few days ago it died again, volt meter in cluster is reading extremely low (9.5v or something)(did this everytime) and cranking but acting like its not getting fuel. Put a fresh battery in it, volts reading good but still wont run. Truck has brand new starter, alternator, battery. Distributor cap is newer and tried a different ignition coil but still nothing.

Hoping someone has had the same problem and could give me some answers. I do have a parts truck so if you have had the same or similar issue and found a solution let me know and ill try swapping a part from one on my parts truck.
New to the forum and hoping to find some answers!

 

[fishin_wi]

can you hear the buzzing of the fuel pump running with ignition on, engine off?

 

[Molson02536]

2003 GMC sonoma 4.3 4x4 automatic

Having some issues with my truck. Throughout the winter, if the temperature dropped below -10celcius i could guarantee it wouldnt start when i went out.It kind of sounded like it wasnt getting fuel, just cranking. After leaving it a few days it would start right up.
A couple of times in the summer it would try and turn over and start but quickly there after die out (usually only run for a second or two). After leaving it for 15-20 mins it would start and run fine.
A few days ago it died again, volt meter in cluster is reading extremely low (9.5v or something)(did this everytime) and cranking but acting like its not getting fuel. Put a fresh battery in it, volts reading good but still wont run. Truck has brand new starter, alternator, battery. Distributor cap is newer and tried a different ignition coil but still nothing.

Hoping someone has had the same problem and could give me some answers. I do have a parts truck so if you have had the same or similar issue and found a solution let me know and ill try swapping a part from one on my parts truck.
New to the forum and hoping to find some answers!

The ground wire toy our fuel sending unit may have gone bad wich would cause your fuel pump to be weak which would cause low fuel pressure, or your fuel sending unit it self is worn out.

The fuel pressure needed to prim the fuel system to get the engine started need to be 62-65 PSI. Anything less then that would cause you a hard or no start at all.

Check the fuel pressure at the shredder valve at the rear of the engine by the distributor on the drivers side. You shyould get 62-65 PSI with the engine not started and it should drop about 5 PSI when the engine is running.

You can try to get the engine started by spraying some starter fluid into the throttle body and if it starts, then you know its not an ignition issue. If it stalls out when the starter fluid had burt off, then you have a fuel issue from a dirty fuel filter or low fuel pressure from a bad sending unit.

Keep us posted and be safe

Molson02536