Manual Transmission Fluid; Rear Axle - GMC T-Series 1999 Owner's Manual

Automatic Transmission External Filter
Your automatic transmission spin
periodic replacement. It is mounted just behind the
radiator on the outside of the passenger's side frame rail.
Consult the Allison Automatic Transmission Driver's
Handbook that came with the vehicle for proper
change intervals.

Manual Transmission Fluid

When to Check
A good time to have it checked is when the engine oil is
checked. See your Maintenance Schedule to find out
when to change your transmission fluid and filters.
How to Check and What to Use
The Eaton Fuller Manual Transmission Operator's
Manual that came with the vehicle shows how to check
the manual transmission fluid and what fluid to use.
6-28
-
on type filter requires
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. Be
sure to get an accurate reading if you check your
transmission fluid.

Rear Axle

When to Check and Change Lubricant
Refer to the Maintenance Schedule to determine how
often to check the lubricant and when to change it.
See "Scheduled Maintenance Services" in the
Maintenance Schedule.
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