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Ask Chris (aka- Moose) Your Own Question
Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Transmissions
Satisfied Customers: 1749
Experience:  16 yrs. experience with auto, manual, & CVT drivelines
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My 2007 Chevy 2500 HD 6 Litre has a 6L90 transmission that

Customer Question

My 2007 Chevy 2500 HD 6 Litre has a 6L90 transmission that will not operate in Manual(pushbutton) and the Auto mode works well but on occasion slips into 5th so I have to stop, turn the engine off for a minute and then we can operate for the rest of the day in Automatic only....the 2nd and 3rd slips a bit as well on acceleration slowly but when you push it from a stop the automatic shifts normal.
JA: How many miles are on the car? Is it the original transmission?
Customer: Original and about 600Kms
JA: Are you fixing your 2500 yourself? What have you tried so far?
Customer: I am not a mechanic...
JA: Anything else you want the mechanic to know before I connect you?
Customer: I don't know what he would need....
Submitted: 4 months ago.
Category: Transmissions
Expert:  hdgene replied 4 months ago.

Hello, and thank you for using Just Answer! My name is***** me a few moments to review your question and Ill do my best to assist you.

Expert:  hdgene replied 4 months ago.

Hello is the transmission full of fluid and does it smell burnt or look black? Any warning lights on and have you had a diagnsotic check for codes of the transmission with a scan tool?