Gmc 2008 Canyon User Manual download pdf (Page 281)

Automatic Transmission Fluid

When to Check and Change

Automatic Transmission Fluid

A good time to check your automatic transmission ﬂuid

level is when the engine oil is changed.

Change the ﬂuid and ﬁlter at the intervals listed in

Additional Required Services on page 6-6, and be sure

to use the transmission ﬂuid listed in Recommended

Fluids and Lubricants on page 6-12.

How to Check Automatic

Transmission Fluid

Because this operation can be a little difficult, you may

choose to have this done at the dealer/retailer 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.

Wait at least 30 minutes before checking the

transmission ﬂuid level if you have been driving:

• When outside temperatures are above 90°F (32°C).

• At high speed for quite a while.

• In heavy traffic — especially in hot weather.

• While pulling a trailer.

To get the right reading, the ﬂuid should be at

normal operating temperature, which is 180°F to 200°F

(82°C to 93°C).

Get the vehicle warmed up by driving about 15 miles

(24 km) when outside temperatures are above

50°F (10°C). If it is colder than 50°F (10°C), drive

the vehicle in THIRD (3) until the engine temperature

gage moves and then remains steady for 10 minutes.

A cold ﬂuid check can be made after the vehicle

has been sitting for eight hours or more with the

engine off, but this is used only as a reference.

Let the engine run at idle for ﬁve minutes if outside

temperatures are 50°F (10°C) or more. If it is colder than

50°F (10°C), you may have to idle the engine longer.

Should the ﬂuid level be low during this cold check,

you must check the ﬂuid hot before adding ﬂuid.

Checking the ﬂuid hot will give you a more accurate

reading of the ﬂuid level.

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Gmc 2008 Canyon User Manual Page 281

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