How long will it last - 08 Denali w/ TVS1900

[mattluttrell]

The book recommends a trans fluid change at 50k if police/taxi/warm climate or at 100k if not. I'd go ahead and plan on doing a full transmission fluid change soon.

 

[JennaBear]

Should be just fine, so long as you keep it maintained and drive it properly.

 

[Bad324]

Motors are great. My last job we had an 07 with original motor at 310,000 miles when I left. It was however on it's 2nd trans

 

[Goodinblack]

Drop the transmission pan and see how it look inside now

Also have a oil analysis done