I have a 2006 escalade ext that has developed an interesting problem. sometimes from a stop if you give it gas it starts to accelrate than falls on its face. let off the gas and press the pedal again the same thing will happen. then it will finally go down the street and act as if nothing has happened. no codes except for a wheel speed sensor code c0035 and a steering code c0455.
Also sometimes when driving down the road at 25-35mph the truck will drop power then come back to full power this will happen several times then go away. it will also idle high aprox1000 rpm when coming to a stop but will accelerate normaly.
recent service work truck gave a misfire code on cyl 5 at that time replaced spark plugs with factory plugs new wires intake manifold gasket new air filter and cleaned throttle body. I have driven close to 3000 miles since that was all done before this issue started.
If anybody has had a similar problem please let me know what resolved your issue I don't know where to start at this point. the problem is so intermitent and without a code I am a little lost