One problem related to transmission fluid leaking has been reported for the 2003 Chevrolet Avalanche. The most recently reported issues are listed below.
I noticed a spray on the back of my Avalanche. I checked nuder the vehicle and noticed a small puddle of fluid which appeared to be transmission fluid. I checked the fluid level and it was near empty. I added fluid and when I used the vehicle it ran ok, but when I stopped it left a larger puddle under the vehicle. I drove my vehicle for a little while and when I checked again it was leaking still. I crawled under the vehicle and saw that it was leaking from where it connects to the engine or axle. (not sure what its called). I have read several complaints about Avalanches having bad transmissions. Most were around the same mileage. I cannot afford to fix my vehicle, and since I noticed it now it may just need a new seal, but where the transmission is leaking from it is expensive. What help can I get, this is my only vehicle my family and I own. Also when I start my Avalanche, sometimes the starter will stay on and I have to turn the key off and restart it. It appears the ignition or starter is defective. Any help would be appreciated. . Thank you!!.