Chevrolet 4500 HD 2023 Manual page 316

No. Service Interval
1 Engine noise check
2 Valve lash
3 Engine oil and oil filter (2)
4 Oil catch cup
5 Fuel filter
6 Pre-fuel filter/water separator
7 Air cleaner filter
8 Drive belts
9 Engine bolt torques
10 Rotate tires
11 Engine cooling system
12 Engine coolant
13 Exhaust system
I I I I I I
- - - - A -
R R R R R R
I I I I I I
- R - R - R
- R - R - R
- - - - - -
I I I I I I
- - - - I -
R R R R R R
I I I I I I
Every 24 months: R (when dealer recommended coolant is used)
I I I I I I
Service and Maintenance
I I I I I I
- - - A - -
R R R R R R
I I I I I I
- R - R - R
- R - R - R
- - - - - -
I I I I I I
- - - I - -
R R R R R R
I I I I I I
Every 12 months: I
I I I I I I
Service intervals months or
kilometers (miles) whichever
occurs first (1)
or every 12 months
or every 12 months
or every 300 hours
or every 12 months
or every 300 hours
or every 24 months
or every 24 months
indicator (3)
or every 12 months
or every 12 months
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