2007 Chevy Tahoe weird unrelated problems

[tamimi]

I have a 2007 (new body) Chevy Tahoe (90,000 Miles) that has been doing great with no issues at all until yesterday. I was on 250 Mile trip and in the middle of nowhere The Traction control turned off, the Stab Trac did too, the A/C is only blowing and not cooling, Some of the instrument died (RPM) and the check engine sign went on.

 

The weather was extremely hot (110 F ) So I suspected the belt has gone and it might damaged some of the electronics as the engine is still running. So I decided to call a towing Truck and I did. By the time I got back to my home, all the signs disappeared and I drove the car for 15 min and everything was perfect!

 

Next morning going to work all the symptoms went back on!

 

I scanned my Truck and the following codes were there:

P0300 Random Misfire Detected <== I replaced Spark plugs, Wires...etc 2 months ago and I only have about 3000 Mi on them

P0326 Knock Sensor

P0335 CrankShaft <===== ?!

P0336 CrankShaft <===== ?!

 

Giving the amount of codes that came on together, I am almost sure its an electrical problem.

Any Idea?

[8.1HD/ALLISON]

I would definatly say electrical problem. Sounds like a job for the dealership.

[tamimi]

I just took it in quick ride.... here are some additional things I observed:

 

when I press the gas pedal to the end, I can tell you that the engine is reduced by at least 50%

I also noticed a slight vibration when cornering, which makes me think that the traction/stab control is the one causing the issues in the first place. Next step, Where to look ?

[8.1HD/ALLISON]

Does it say engine power reduced on display? If so its going into limp mode. I've seen that caused by the accelerator pedal having sensor problems before. I believe that may also throw the abs and trac lights.

[tamimi]

no it doesn't say that...

[ruggedlife]

check your battery cables... in my 09 i had installed an amp and my dumbass never tightened down the possitive on the battery all the way. that damn thing would drive PERFECT and then light up like a damn christmas tree, then be PERFECT it wasn't a happy camper. tightened that back up and it was like it never happened. also is it still the stock original battery? could be on its way out as well. how are the start ups?

[tamimi]

The battery is only a year old... I will try to replace it with another one from my other car.

I tried to clean the terminals, I noticed that the negative terminal looks like its rusted so I tried to clean it but nothing changed so should I assume that this is how it should look? The positive terminal looks like silver steel.

[tamimi]

Did so...nothing changed