Chevrolet 4500 HD 2023 Manual page 322

18. Brake Pads for Wear : Check disc brake
pads for wear or cracks every 16 000 km
(10,000 miles). Check brakes (including
parking brake) more often if operating
conditions or driving habits result in
frequent braking.
Disc brakes have built-in wear noise
indicators which are designed to make a
high pitched squeal or 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 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.
19. Brake Rotors for Wear and Damage :
Check brake rotors for wear or damage
every 32 000 km (20,000 miles) or
12 months whichever occurs first.
20. Brake Fluid : Check the fluid in the
brake fluid reservoir every 16 000 km
(10,000 miles). Replace the fluid every
48 000 km (30,000 miles).
21. Brake Line and Hoses : Check lines and
hoses for proper hook-up, binding, leaks,
cracks, chafing, etc. every 32 000 km
(20,000 miles). Any questionable parts
should be replaced or repaired at once.
When rubbing or wear is noted on lines or
hoses, the cause must be corrected at once.
22. Parking Brake Cable : Check the parking
brake cable every 16 000 km (10,000 miles)
or 12 months whichever occurs first.
23. Automatic Transmission Fluid : Check the
automatic transmission fluid level at each
engine oil change and replace fluid every
96 000 km (60,000 miles). Do not overfill.
See Automatic Transmission Fluid 0 247.
24. Differential Gear Oil : Replace lubricant
every 48 000 km (30,000 miles). Check
lubricant level every 16,000 km
(10,000 miles) or every 12 months, and add
lubricant to within 0 to 10 mm (0 to
0.4 inch) of the bottom edge of the filler
hole if necessary. See Rear Axle (Gear Oil
Viscosity) 0 263 or
Rear Axle (Oil Level Check) 0 263.
25. Power Steering Fluid : Replace power
steering fluid every 24 months or
48 000 km (30,000 miles), whichever occurs
first.
Service and Maintenance
26. Power Steering Oil Hoses : Replace
power steering oil hoses every 24 months or
96 000 km (60,000 miles), whichever occurs
first.
27. Steering Wheel Free Play : Check
steering wheel free play after the first
8 000 km (5,000 miles) and then every
16 000 km (10,000 miles).
Steering wheel free play
10-50 mm (0.39-1.97 in)
28. Steering Gear Box Torque : Retighten
the attaching bolts of the steering gear box
to the specified torque every 12 months or
every 32 000 km (20,000 miles) whichever
occurs first.
Steering gear box tightening torque
103 (76 lb·ft)
29. Driveshaft Flange Torque : Check the
fixing bolts of driveshaft flange for looseness
or damage after the first 16 000 km
(10,000 miles).
Driveshaft flange tightening torque
103 (76 lb·ft)
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