Chevrolet Low Cab Forward 4500 2019 Series Owner's Manual page 278

You must check the fluid level with
the engine running at slow idle and
the truck must be on a level surface.
If you have driven for a prolonged
period of time or in city traffic in hot
weather, wait until the fluid cools
down (Approx. 30 minutes) before
checking fluid level.
Single cab: Remove the dipstick
located at the rear right side of the
engine.
Crew cab: Remove the dipstick
located beneath the rear-of- engine
inspection panel. After unlatching
the A/T fluid inspection cover, the
dipstick will be visible.
Carefully touch the wet end of the
dipstick to find out if the fluid is cool,
warm or hot. Wipe it clean and push
it back in until the cap seats. Pull
out the dipstick and read the fluid
level.
If it felt cool, about room
temperature, the level should be in
the "C" range.
If it felt warm, about normal
operating temperature of 70 °C to
80 °C (158 °F to 176 °F), the level
should be in the "H" range.
16. ROTATE TIRES : To equalize
wear, rotate tires and adjust tire
pressures at every 12 000 km
(7,500 miles). See Tire Rotation
0 249.
17. BRAKE LINING AND PAD
FOR WEAR :
: Check drum brake linings and
disc brake pads for wear or cracks
at every 12 000 km (7,500 miles).
Check brakes (including parking
brake) more often if conditions and
habits result in frequent braking.
Front disc brakes have built-in wear
indicators which are designed to
make a high pitched squeal or
Service and Maintenance
cricket-like warning sound when the
brake pads are worn to the point
where new pads are needed.
When the truck is in motion, the
sound may be constant or it may
come and go.
Pressing the brake pedal firmly may
cause the sound to stop.
Have the brake linings or the brake
pads replaced by your authorized
dealer as soon as possible after the
warning first becomes evident.
Failure to do so can result in
expensive damage to the brake
system or a serious crash.
18. BRAKE DRUM AND ROTOR
FOR WEAR AND DAMAGE :
Check brake drums (rear and
parking) and rotors for wear or
damage every 48 000 km
(30,000 miles) or 12 months
whichever occurs first.
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