I'm at a loss

[Brandon Allen]

Question fellas And ladies, I typically don't post on forums, but I'm at a poss currently. My truck is 2010 Silverado 4.8 and after driving it for 30 or so minutes the traction control/ stabitrax light comes on, the tachometer cuts off and the truck feels like it's jerking going forward, if I'm stopping or stopped the truck stalls and won't turn back on for Maybe an hour. I've replaced the fuel pump, crankshaft position sensor, engine temperature sensor, replaced the plugs and wires maybe a year ago, and I don't drive it much because I live close to work. Yesterday I had been driving it a little farther because I thought it was fixed, but as I was getting on the highway, the truck popped/ jerked, and the stabitrax/traction control off displayed and a couple of seconds later, the tachometer went to zero. I was able to get her home, but the truck kept jerking all the way home. I think the problem is unrelated, but my oil pressure has been getting lower as I drive it. Any help would be great, thanks. 

[swathdiver]

6 minutes ago, Brandon Allen said:

Question fellas And ladies, I typically don't post on forums, but I'm at a poss currently. My truck is 2010 Silverado 4.8 and after driving it for 30 or so minutes the traction control/ stabitrax light comes on, the tachometer cuts off and the truck feels like it's jerking going forward, if I'm stopping or stopped the truck stalls and won't turn back on for Maybe an hour. I've replaced the fuel pump, crankshaft position sensor, engine temperature sensor, replaced the plugs and wires maybe a year ago, and I don't drive it much because I live close to work. Yesterday I had been driving it a little farther because I thought it was fixed, but as I was getting on the highway, the truck popped/ jerked, and the stabitrax/traction control off displayed and a couple of seconds later, the tachometer went to zero. I was able to get her home, but the truck kept jerking all the way home. I think the problem is unrelated, but my oil pressure has been getting lower as I drive it. Any help would be great, thanks. 

Brandon, without a scan tool to pull up the codes or to graph the sensors you're guessing.  It is normal for oil pressure to be higher right after start up and drop down to normal when the engine and oil is up to temperature.  Someone might recognize these maladies but if not, get yourself a good scan tool.

[Brandon Allen]

6 hours ago, swathdiver said:

Brandon, without a scan tool to pull up the codes or to graph the sensors you're guessing.  It is normal for oil pressure to be higher right after start up and drop down to normal when the engine and oil is up to temperature.  Someone might recognize these maladies but if not, get yourself a good scan tool.

Yes the crappy part is the check engine light never comes on and there is no stored codes.

[swathdiver]

2 minutes ago, Brandon Allen said:

Yes the crappy part is the check engine light never comes on and there is no stored codes.

Hmm, maybe the problem resides in the chassis module.  Most basic code readers cannot see those codes, just the engine control module.  Do you know anyone with a Tech-2 or other bi-directional scan tool?  You can get a VXDIAG NANO for about $100 and use it with a laptop or tablet with Tech-2-WIN.

[Chevit_afordit]

I dont want to let you down or miss guid you but in my many expireances, this could be a result of a blown head/ head gasket. Are you having to add oil or dose the presure just fluxuate?

Hope it is something simple good luck