Chevrolet 2002 Avalanche Owner's Manual download pdf (Page 344)

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Automatic Transmission Fluid

When to Check and Change

A good time to check your automatic transmission fluid

level is when the engine oil is changed.

Change both the fluid and filter every 50,000 miles

(83 000 km) if the vehicle’s GVWR is over 8,600 or

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.

If you do not use your vehicle under any of

these conditions, change the fluid and filter every

100,000 miles (166 000 km).

See “Scheduled Maintenance Services” in the Index.

How to Check

Because this operation can be a little difficult,

you may choose to have this done at the dealership

service department.

If you do it yourself, be sure to follow all the

instructions here, or you could get a false reading

on the dipstick.

NOTICE:

Too much or too little fluid can damage your

transmission. Too much can mean that some of

the fluid could come out and fall on hot engine

parts or exhaust system parts, starting a fire.

Too little fluid could cause the transmission to

overheat. Be sure to get an accurate reading

if you check your transmission fluid.

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Chevrolet 2002 Avalanche Owner's Manual Page 344

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