Denali Transmission
December 19th, 2010, 4:03 AM
#1
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Denali Transmission
2007 Denali bought used with 69K miles, and currently has 75K miles. 6.2L motor.
Should I have the tranny flushed, drain and fill, or leave it alone?
I've read different stories about flushing, but I don't have any clue as to what the previous owner has done to the vehicle, so maybe it's just for my sense of security.
Should I have the tranny flushed, drain and fill, or leave it alone?
I've read different stories about flushing, but I don't have any clue as to what the previous owner has done to the vehicle, so maybe it's just for my sense of security.
December 19th, 2010, 7:21 AM
#2
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Yes, absolutely. Take it to your dealership and have them do a servicing of the transmission. Do a transmission service about every 50,000 km or 30,000 miles. Change the fluid and the filter. In Canada, where I live it costs about $150 to complete the service.
With no prior knowledge about service history on the vehicle, you have to assume that any servicing was minimal.
With no prior knowledge about service history on the vehicle, you have to assume that any servicing was minimal.
December 20th, 2010, 12:07 PM
#5
Tranny
Change automatic transmission fluid and filter if the
vehicle is mainly driven under one or more of these
conditions:
− In heavy city traffic where the outside temperature
regularly reaches 90°F (32°C) or higher.
− In hilly or mountainous terrain.
− When doing frequent trailer towing.
− Uses such as found in taxi, police, or delivery
service
50,000 for 'severe' service, and 100k for 'normal'
I bought mine new, it has 30k on it now... it won't get it till 100.
I tow a 5,000 boat with electric brakes exactly 1.2 miles to and 1.2 from the launch every few weeks in the summer. No major hills, no major traffic...
vehicle is mainly driven under one or more of these
conditions:
− In heavy city traffic where the outside temperature
regularly reaches 90°F (32°C) or higher.
− In hilly or mountainous terrain.
− When doing frequent trailer towing.
− Uses such as found in taxi, police, or delivery
service
50,000 for 'severe' service, and 100k for 'normal'
I bought mine new, it has 30k on it now... it won't get it till 100.
I tow a 5,000 boat with electric brakes exactly 1.2 miles to and 1.2 from the launch every few weeks in the summer. No major hills, no major traffic...
December 20th, 2010, 3:38 PM
#6
CF Veteran
Change automatic transmission fluid and filter if the
vehicle is mainly driven under one or more of these
conditions:
A. − In heavy city traffic where the outside temperature
regularly reaches 90°F (32°C) or higher.
− In hilly or mountainous terrain.
− When doing frequent trailer towing.
− Uses such as found in taxi, police, or delivery
service
50,000 for 'severe' service, and 100k for 'normal'
I bought mine new, it has 30k on it now... it won't get it till 100.
I tow a 5,000 boat with electric brakes exactly 1.2 miles to and 1.2 from the launch every few weeks in the summer. No major hills, no major traffic...
vehicle is mainly driven under one or more of these
conditions:
A. − In heavy city traffic where the outside temperature
regularly reaches 90°F (32°C) or higher.
− In hilly or mountainous terrain.
− When doing frequent trailer towing.
− Uses such as found in taxi, police, or delivery
service
50,000 for 'severe' service, and 100k for 'normal'
I bought mine new, it has 30k on it now... it won't get it till 100.
I tow a 5,000 boat with electric brakes exactly 1.2 miles to and 1.2 from the launch every few weeks in the summer. No major hills, no major traffic...
Last edited by RacerX; December 20th, 2010 at 3:40 PM.
February 21st, 2011, 1:55 PM
#7
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The owners manual for this vehicle says for the 50k/100k mile maintenance plan to change the Automatic Transmission Fluid and Filter for the severe service and 100k miles for this maintenance for the normal service plans. This information is found on page 554 of the Owners Manual. I hope this information helps you.
Jeff Morris, Chevrolet Customer Service
Jeff Morris, Chevrolet Customer Service
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February 21st, 2011, 6:07 PM
#8
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You do that and the thing wont last past 100K. I use a different schedule. Change tranny filter and fluid every 10,000 miles if you are in the Heavy Duty Schedule(A). Otherwise, tranny filter and fluid replacement every 30,000 miles under normal use. Thats how you take care of stuff and can get close to 200K in one unit.
dude, we live in 2011 
Just relax and let trany do his work and don't tread it like kid My tranny died in 60k but car was under 100k warranty
Now i have brand new with another 100k
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