2006 chevy uplander 2wd shakes at all speeds while accelerating and abs light as well as service engine light and low battery key fob lights too. dealer says tires have flat spots, firestone says tires are fine but battery needs replaced, autozone says battery is at 100%. Goodyear also says wheel speed sensor is NOT the problem. what can I do?

Apart from trading it in for a new model you could try changing the back wheels for the front wheels and see if this cures the wobble.the car battery is fine if its starting ok so leave that well alone as no doubt the firestone have a special on the batteries where the mechanic gets so many cans of beer for each battery sold .forget the service engine light thats their to make you take vehicle to dealer to have it done to put the light out ,change the battery in the key fob but be warned this vehicle has to be put on the dealer diagnostic machine to reset ,another wheeze to keep the dealers in business so use another battery with the wires on to hook into contacts on the key fob before you change the battery ,save about 80 euros + labour .now the ABS light ??? thinking ,could be lots of things but here you may need a local mechanic to have a look for you as the cause could be sensor on a wheel or the wheel bearing as the modern motor uses a gray paste on the back of the wheel bearing instead of a metal ring with teeth and this paste/paint can get damaged by a twig or plastic bag getting caught behind the bearing rubbing it off ,i have the teashirt for this so dont ask.see how you get on and if you need anything else just answer the reply

Just google it.. or some free websites.. for pdf free manuals, diagrams, troubleshoot, error codes and all.. like reliable-store.com ..there are many sites others too..

Are your rims 6 hole? Does the car have aftermarket rims? It is a common mistake to put 114.3 x 6 rims on it when the factory size is a (rare) 115.0 x 6.

If you have 114.3 wheels (very common), they can be tightened very slowly, alternating lug nuts to get rid of the wobble for the meantime until you can get 115.0 rims.