Starting And Operating; New Vehicle Break-In; Pedals - Chevrolet 4500 HD 2023 Manual

136 Driving and Operating

Starting and Operating

New Vehicle Break-In

Good vehicle care begins with proper
break-in. While every new vehicle goes
through rigid factory and dealer inspection
and tests before delivery, the care you give
your vehicle during the initial break-in
period can pay off in longer life, better
performance and more economical
operation.
It is therefore always recommended that
during the initial 1 000 km (600 mile)
break-in period, the following few simple
precautions are carefully observed.
Follow the recommendations listed below:
Warm up the engine by driving easily for
the first few minutes before placing it
under load.
Do not drive for extended periods at any
one constant speed, either fast or slow,
during the first 800 km (500 miles).
Use the correct gear to maintain the
desired road speed without lugging the
engine.
Avoid racing the engine, full-throttle
starts and aggressive application of brakes
when stopping.
Keep tires properly inflated for the load
carried.
Check lubricant levels in the engine and
transmission weekly.
Keep speeds below 80 km/h (50 MPH) for
the first 800 km (500 miles).
Use the lowest gear ratio available when
starting a loaded vehicle and when
climbing slopes to avoid lugging the
engine.
It is recommended that the engine speed
is restricted to 2,300 r/min.
Mechanical Driveshaft Brake Burnish
Procedure
It is recommended that the driveshaft
mounted parking brake be burnished as part
of the new vehicle break-in procedure.
Increased parking brake performance will
result when the parking brake is burnished
as specified below:
Make 10 moderate stops, using the hand
brake, from 16 km/h (10 MPH) while
spacing the stops a minimum of 4 km
(2.5 miles) apart.
Operate the vehicle at 32 km/h (20 MPH)
between stops.

Pedals

Sit in a correct driving position on the seat
and operate the brake pedal (1) and
accelerator pedal (2) with your right foot. To
avoid accidentally pressing the wrong pedal,
check the pedal positions and practice
putting your foot on the desired pedal.
Warning
A can or bottle rolling on the floor may
prevent brake pedal operation if it is
caught under the pedal. This is very
dangerous. A floor mat must be placed
correctly. An incorrectly installed floor
(Continued)