Chevy Tahoe 2007. Shaking steering wheel at higher speeds...

Hi there Thank you for choosing just answer! I am sorry you are having issues with your vehicle but im here to help! Im cam, a licensed diagnostic tech with over 25 years of experience please give me a few moments to go over your question and reply please be patient and allow me time to reply as i might be looking up information and diagrams and typing. you will receive a request for a phone call, this is an automatic response and not always needed. 5 star ratings are always appreciated :) thanks!

Also, it doesn’t like to start all the time and is sluggish and difficult to accelerateNo I’m in no hurry

Being that this is shaking the steering wheel it will be one of three things 1. wheel balance rebalance the wheels and check for warped rims. 2. belt seperation in the tire check the tires for a belt that is seperated. These will usually show themselves on the tread as abnormal flat spots that have tire wear in only one area or the tire tread or even bulges. both a tire balance and seperated belt can be found on a balance while watching it spin. You can also rotate the wheels front to rear to see if the shake goes away 3. seizing brake caliper or hose a seizing brake caliper can hold the wheel back causing a shake that will transfer into the steering wheel. this can also cause it to feel slugish get the brakes hot and raise the front wheels off the ground and feel for holding brakes. This will indicate a seizing cliper or a hose that is collapsed. your issue will be one of these. rotating the wheels front to rear can pinpoint if it is a tire and wheel problem or a holding brake problem. Always do a complete front end inspection when checking these to eliminate a loose front end component as a culprit let me know how you make out and if i can assist you further i would be happy to help! cam

Thank you cam!

no problem! good luck with your repair :) cam

As far as the car not always starting first time, is sea foam something I should try?It idles horribly when I'm stoppedMaybe I should have started with this, but I get P0016 and P0449 codes

sea foam will most likely not help with your running isse the 0449 is an emmisions code and will not cause a rough run. most likely the vent valve has failed the 0016 is a cam and crank signal issue you will need to scope your cam and crank sensors and look for a good solid 5 volt waveform if any of the sensors are producing a bad signal then it is one of those signals. if good signals then most likely a timing issue and will require a mechanical timing check you will need a scope to test these sensors unfortunately or you are just replacing sensorsors hopefully fixing your issue cam

that's what I've heard, just checking. Thank you!

no problem :)