Chevy Avalanche Steering Vibration

Question:
I have a 2005 Avalanche truck that when I go between 50 & 55 mph there is a noticeable vibration in steering wheel. You don't notice it when going below or above this speed. Thank you.

Answer:
Most steering wheel vibrations are caused by tire issues. Low, irregular tire tread, out of balance, shifted belt, etc. Rotate tire if they have not already been (assuming rear tires are in good shape). See if it goes away or changes. Could also have a bent wheel. Possibility of a worn outer tie-rod end, but usually will be a wider speed range.

If the truck is less than 3 years old since purchase, and less than 36k miles, suggest taking to dealer and have them check it out under warranty. Tire or wheel problem would not be warranty, but a steering component or suspension component would be.

Question:
2003 Chevy Silverado 1500. Engine size = 8 cylinder Vortec. Got 4 new tires now front right is making a thumping noise like tire is going flat but tire are fine please help.

Answer:
You could have a bad tire, or a bad spot in the tread, like a belt that is not in position. It could have not been balanced correctly either and the thumping noise you hear is from the wobble of the tire on the road. Someone could have possibly installed it wrong, or bent a backing plate or something like that is causing your noise. Your best bet is to take it back to whoever installed the new tires, so they can take it off and check it out, and re-balance if necessary.

Question:
2003 Chevrolet Avalanche 5.3L. Warning lights ABS and codes. Replaced new transmission put in it and new fuel pump. why does my truck run in park but as soon as it gets warm i put it in gear and it dies and it's hard to start again.

Answer:
You may just have carbon buildup in the throttle body. Give that a good cleaning then take it for a hard ride to blow it our. It that does not help, then you need to look for a vacuum leak on your truck and check that you properly installed all the ground wires during the replacement of the transmission.