What is the 2005 chevy express 3500 transmission fluid capacity?

Regardless of the engine configuration of Your 2005 Chevrolet ExpresS3500, Your GM4L80-E automatic transmission will always require a total fill of 13.5 quarts, with a typical service fill being 7.7 quarts. The van is known to have some transmission issues, especially as its getting up there in age; regular transmission fluid changes can help mitigate these. You should change Your transmission fluid every 25,000 to 40,000 miles, to account for breakdown. You should also check Your levels between changes. If, during a change, the fluid is particularly d***y or broken down, You may want to wait a week of driving and complete another change -- since You're only getting about half of the transmission fluid in each replacement, a double-change can sometimes help Your transmission's smooth operation.