i had rearend rebuilt in 09 and ever since no speedometer, cruise, check engine lite on and its not keeping track of mileage. i read up on sensors and found several sensors that could be jacked up. any sugestions. i pulled code with reader and it comes up with speed sensor probs.

 

There is a speed sensor in your rear diff. It's located onthe top part of the pumkin(frontside). Make sure it's plugged in and it's fre of debris. if your rearend had a bunch of metal particles, you may want to replace the sensor. Also, could be a tone ring issue, maybe they did the install incorrectly?
There are also a sensors on each front wheel, but I'd check the rear one first.

Look at THIS thread. LOTS of info in there even though yours is likely due to the rear sensor as its kinda obvious that you just had work done.