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sprinkles08, ASE Certified Technician
Category: Chevy
Satisfied Customers: 23105
Experience:  ASE Master and Advanced level certified. Factory trained with 17 years dealership experience
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I replaced nsbu switch on my 2002 duramax diesel and same

Customer Question

I replaced nsbu switch on my 2002 duramax diesel and same shift isues exist when trans is hot
JA: How old is the transmission? Have you noticed any leaking?
Customer: No leaking only have 52000 miles has been babyed
JA: What is the model of your '02 Chevy?
Customer: 3/4 ton 4x4
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: I replaced the nsbu switch
JA: Anything else you want the mechanic to know before I connect you?
Customer: Just that I bought the truck New in 2002
Submitted: 11 months ago.
Category: Chevy
Customer: replied 11 months ago.
I thought this was fast
Expert:  sprinkles08 replied 11 months ago.

Hello and welcome to JustAnswer!

There are quite a few things that can cause shifting issues, especially depending on what is actually happening. The problem could be internal in the trans, it could be low fluid level, a linkage issue, or it could be going into imp in for a number of reasons.

What specifically is happening?