Dear users,
I'm in need of some help my chevrolet silverado 4.3l 2004, is having some issues,
it's having problems starting up when cold it's a 5 speed manual, and has intermittent problems through the gears.
It shudders at around 1500rpm and bogs down and judders(LOSES POWER)
I'm not really great with cars/trucks but I changed the fuel filter,added dry gas,changed air filter. all to no avail I checked the spark plugs and they look perfect and clean, Bosch platinum,
Any suggestions would be greatly appreciated. Thanks.

 

Is the check engine light on? I'd say add seafom to the gas tank as a start. I know you posted gas dry, but that leads me to believe you think you got some bad gas. Try either seafoam, or a good injector cleaner.