I just purchased a dulley 4x4 6.6L Chevy silverado 3500.
When i first saw it in the lot it looked good drove good and was in exalent condition.
It had TONS of power and tore down the street.
Well i liked it enough i bought it for a not so nice price but that is how it goes.
Later I went to take it on a big job of moving hay from Minnesota to where i live in Missouri.
The trailer with the hay would haul up those big hills like they were not even there.
I was pretty happy with the truck than all of a suddan the check engine light came on and all my power left.
Ever since than it has been a nightmare.
If i turn off the truck and turn it back on it is fine and drives like nothing happend .
I changed the fuel filter hoping that it was bad fuel or somthing.
The problem has persisted for a while now.
Let me describe what happens.
The check engine light comes on i loose power.
The engine will not go above 2000 rpm in any gear.
I barely crawl up the hills at 20mph.
The engine dosent sound bad evrything sounds right but the truck just wont go.
I have reaserched and found that several people have this problem and it has earned the name "Limp Mode"
It is not a permanant problam as soon as you turn it of and restart it is fine again.
I have gotten to the point were i think it is some problem with the truck computer.
I dont know the codes for the engine light yet but ill try to get it soon.
Now some ideas i have had is if it is a computer problem were it switches to this "Limp Mode" for some reason how to i turn it off.
Modern technologie allows for people to plug something into the OBD-II slot called a power programmer were it overrides to trucks computer to add power or increase fuel econamy.
I heard of a guy that got a OBD-II to usb and hooked it up to his computer and was able to use his computer as the power programmer.
What i want to know is how do i use my computer to talk to the truck computer via the OBD to usb cable to ether learn how to fix this problem OR Flash the trucks computer (Wipe evrything) and reinstall the updated computer software.
Bottom line i want the truck fixed. Please help Thanks.