Buick 2005 LaCrosse User Manual download pdf (Page 297)

Automatic Transmission Fluid

It is not necessary to check the transmission ﬂuid level.

A transmission ﬂuid leak is the only reason for ﬂuid

loss. If a leak occurs, take your vehicle to the dealership

service department and have it repaired as soon as

possible.

Change both the ﬂuid and ﬁlter every 50,000 miles

(83 000 km) 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, the ﬂuid and ﬁlter do not require changing.

Notice: Use of automatic transmission ﬂuid labeled

other than DEXRON

-III, Approved for the

H-Speciﬁcation, may damage your vehicle, and the

damages may not be covered by your warranty.

Always use automatic transmission ﬂuid labeled

DEXRON

-III, Approved for the H-Speciﬁcation.

Engine Coolant

The cooling system in the vehicle is ﬁlled with

DEX-COOL

engine coolant. This coolant is designed

to remain in the vehicle for ﬁve years or 150,000 miles

(240 000 km), whichever occurs ﬁrst, if only

DEX-COOL

extended life coolant is added.

The following explains the cooling system and how to

add coolant when it is low. If there is a problem

with engine overheating or if coolant needs to be added

to the radiator, see Engine Overheating on page 5-24.

A 50/50 mixture of clean, drinkable water and

DEX-COOL

engine coolant will:

• Give freezing protection down to −34°F (−37°C).

• Give boiling protection up to 265°F (129°C).

• Protect against rust and corrosion.

• Help keep the proper engine temperature.

• Let the warning lights and gages work as

they should.

Notice: Using coolant other than DEX-COOL

may

cause premature engine, heater core or radiator

corrosion. In addition, the engine coolant may

require changing sooner, at 30,000 miles (50 000 km)

or 24 months, whichever occurs ﬁrst. Any repairs

would not be covered by your warranty. Always use

DEX-COOL

(silicate-free) coolant in your vehicle.

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Buick 2005 LaCrosse User Manual Page 297

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