GM Service Manual Online
For 1990-2009 cars only

Perform the following services up to 166 000 km (100,000 mi) and after 166 000 km (100,000 mi) at the same intervals.

160 km (100 mi)

Perform the wheel stud nut service. (45)

800 km (500 mi)

Perform the wheel stud nut service. (45)

1 600 km (1,000 mi)

Perform the wheel stud nut service. (45, 46)

5 000 km (3,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the clutch pedal free travel service. (10)
    • Perform the rear axle air shift motor service. (11)

10 000 km (6,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Inspect the clutch pedal free travel. (10)

15 000 km (9,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)

20 000 km (12,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Perform the engine drive belts service (or every 12 months, whichever occurs first). (18)
    • Inspect the clutch pedal free travel. (10)
    • Perform the throttle linkage service. (19)
    • Perform the thermostatically controlled engine cooling fan service. (4, 20)
    • Perform the shields and the undercab insulation service. (4, 5, 21)
    • Inspect the operation of the air brake relay valve operation for leaks (or every month or every 300 hours, whichever occurs first). Refer to Air Brake Valves.

25 000 km (15,000 mi)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the steering system service. (13)
    • Perform the front and the rear suspension service. (14)
    • Perform the spring-to-axle U-bolts and the shackle bolts service. (16)
    • Perform the exhaust system service. (3, 4, 17)
    • Perform the air brake service (or every 6 months, whichever occurs first). (39)

30 000 km (18,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic brake caliper service (or every 6 months, whichever occurs first). (22)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Inspect the clutch pedal free travel. (10)
    • Clean airbrake application valve (or every 3 months or every 300 hours, whichever occurs first). Lubricate the linkage.

35 000 km (21,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)

40 000 km (24,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Perform the wheel bearing (grease) service (or every 24 months, whichever occurs first, and whenever the hubs are removed). (23)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Perform the engine drive belts service (or every 12 months, whichever occurs first). (18)
    • Inspect the clutch pedal free travel. (10)
    • Perform the throttle linkage service. (19)
    • Perform the thermostatically controlled engine cooling fan service. (4, 20)
    • Perform the shields and the underhood insulation service. (4, 5, 21)
    • Perform the air intake system service (or every 24 months, whichever occurs first). (4, 5, 24)
    • Perform the thermostatically controlled air cleaner service (or every 24 months, whichever occurs first). (3, 4, 25)
    • Perform the Evaporative Control System service (ECS), if equipped (or every 24 months, whichever occurs first). (3, 26)
    • Perform the rear axle air shift motor service. (11)
    • Inspect the operation of the air brake relay valve for leaks (or every month or every 300 hours, whichever occurs first).
    • Perform the air brake chamber service (or every 2 months, whichever occurs first). (41)
    • Perform the trailer brake hand control valve service (or every 3 months, or 900 hours, whichever occurs first). (42)

45 000 km (27,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)

50 000 km (30,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Replace the fuel filter(s) (or every 12 months, whichever occurs first). (3)
    • Replace the air cleaner filter (or every 24 months, whichever occurs first). (3, 4, 27)
    • Perform the steering system service. (13)
    • Perform the front and the rear suspension service. (14)
    • Perform the spring-to-axle U-bolts and the shackle bolts service. (16)
    • Perform the exhaust system service (or every 6 months, whichever occurs first). (3, 4, 17)
    • Perform the air brake service (or every 6 months, whichever occurs first). (39)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Inspect the clutch pedal free travel. (10)
    • Perform the air brake automatic slack adjuster service (or every 500 hours, whichever occurs first). (40)

55 000 km (33,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)

60 000 km (36,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic brake caliper service (or every 6 months, whichever occurs first). (22)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Perform the engine drive belts service (or every 12 months, whichever occurs first). (18)
    • Inspect the clutch pedal free travel. (10)
    • Perform the throttle linkage service. (19)
    • Perform the thermostatically controlled engine cooling fan service. (4, 20)
    • Perform the shields and the underhood insulation service. (4, 5, 21)
    • Inspect the operation of the air brake relay valve for leaks (or every month or every 300 hours, whichever occurs first).
    • Clean air brake application valve (or every 3 month or every 300 hours, whichever occurs first). Lubricate the linkage.

65 000 km (39,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)

70 000 km (42,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Inspect the clutch pedal free travel. (10)

75 000 km (45,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (3, 6)
    • Perform the front and rear suspension service. (14)
    • Perform the steering system service. (13)
    • Perform the spring-to-axle U-bolts and the shackle bolts service. (16)
    • Perform the exhaust system service (or every 6 months, whichever occurs first). (3, 4, 17)
    • Perform the air brake service (or every 6 months, whichever occurs first). (39)

80 000 km (48,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Perform the wheel bearing (grease) service (or every 24 months, whichever occurs first and whenever the hubs are removed). (23)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Perform the engine drive belts service (or every 12 months, whichever occurs first). (18)
    • Inspect the clutch pedal free travel. (10)
    • Perform the throttle linkage service. (19)
    • Perform the thermostatically controlled engine cooling fan service. (4, 20)
    • Perform the shields and the undercab insulation service. (4, 5, 21)
    • Perform the air intake system service (or every 24 months, whichever occurs first). (4, 5, 24)
    • Perform the thermostatically controlled air cleaner service (or every 24 months, whichever occurs first). (3, 4, 25)
    • Perform the ECS service, if equipped (or every 24 months, whichever occurs first). (3, 26)
    • Perform the rear axle air shift motor service. (11)
    • Perform the air brake chamber service (or every 2 months, whichever occurs first). (41)
    • Perform the trailer brake hand control valve service (or every 3 months, or 900 hours, whichever occurs first). (42)

85 000 km (51,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)

90 000 km (54,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic brake caliper service (or every 6 months, whichever occurs first). (22)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Inspect the clutch pedal free travel. (10)
    • Clean the air brake application valve (or every 3 months or 300 hours, whichever occurs first). Lubricate the linkage.

95 000 km (57,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)

100 000 km (60,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Replace the fuel filter(s) (or every 12 months, whichever occurs first). (3)
    • Perform the steering system service. (13)
    • Perform the front and the rear suspension service. (14)
    • Perform the spring-to-axle U-bolts and the shackle bolts service. (16)
    • Perform the exhaust system service (or every 6 months, whichever occurs first). (3, 4, 17)
    • Perform the air brake service (or every 6 months, whichever occurs first). (39)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Perform the engine drive belts service (or every 12 months, whichever occurs first). (18)
    • Inspect the clutch pedal free travel. (10)
    • Perform the throttle linkage service. (19)
    • Perform the spark plug service (or every 30 months, whichever occurs first). (3, 28)
    • Perform the engine timing service (or every 30 months, whichever occurs first). (3, 4, 29)
    • Perform the thermostatically controlled engine cooling fan service. (4, 20)
    • Perform the shields and the undercab insulation service. (4, 5, 21)
    • Perform the Positive Crankcase Ventilation (PCV) system service (or every 60 months, whichever occurs first). (3, 33)
    • Inspect the operation of the air brake relay valve for leaks (or every month or every 300 hours, whichever occurs first).
    • Perform the air brake automatic slack adjuster service (or every 500 hours, whichever occurs first). (40)

105 000 km (63,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)

110 000 km (66,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Inspect the clutch pedal free travel. (10)

115 000 km (69,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)

120 000 km (72,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Perform the wheel bearing (grease) service (or every 24 months, whichever occurs first and whenever the hubs are removed). (23)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic brake caliper service (or every 6 months, whichever occurs first). (22)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Perform the engine drive belts service (or every 12 months, whichever occurs first). (18)
    • Perform the throttle linkage service. (19)
    • Inspect the clutch pedal free travel. (10)
    • Perform the thermostatically controlled engine cooling fan service. (4, 20)
    • Perform the shields and the undercab insulation service. (4, 5, 21)
    • Perform the air intake system service (or every 24 months, whichever occurs first). (4, 5, 24)
    • Inspect the thermostatically controlled air cleaner (or every 24 months, whichever occurs first). (3, 4, 25)
    • Perform the fuel tank, the fuel cap, and the fuel lines service (or every 72 months, whichever occurs first). (3, 30)
    • Inspect the EGR system (or every 72 months, whichever occurs first). (3, 31)
    • Perform the ECS service, if equipped (or every 24 months, whichever occurs first). (3, 26)
    • Perform the rear axle air shift motor service. (11)
    • Inspect the operation of the air brake relay valve for leaks (or every month or every 300 hours, whichever occurs first).
    • Clean the air brake application valve (or every 3 months or 300 hours, whichever occurs first).
    • Perform the air brake chamber service (or every 2 months, whichever occurs first). (41)
    • Perform the trailer brake hand control valve service (or every 3 months, or 900 hours, whichever occurs first). (42)

130 000 km (78,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Inspect the clutch pedal free travel. (10)

135 000 km (81,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the wheel bearings service for the Eaton® Axle (oil filled) (or every 24 months, whichever occurs first). (1, 23)

140 000 km (84,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Perform the engine drive belts service (or every 12 months, whichever occurs first). (18)
    • Inspect the clutch pedal free travel. (10)
    • Perform the throttle linkage service. (19)
    • Perform the thermostatically controlled engine cooling fan service. (4, 20)
    • Perform the shields and the underhood insulation service. (4, 5, 21)
    • Inspect the operation of the air brake relay valve for leaks (or every month or every 300 hours, whichever occurs first).

145 000 km (87,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)

140 000 km (87,900 mi) (6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the engine drive belts service (or every 12 months, whichever occurs first). (18)
    • Perform the throttle linkage service. (19)
    • Perform the thermostatically controlled engine cooling fan service. (4, 20)
    • Perform the shields and the underhood insulation service. (4, 5, 21)
    • Inspect the operation of the air brake relay valve for leaks (or every month or every 300 hours, whichever occurs first). Refer to Air Brake Valves.
    • Clean the air brake application valve (or every 3 months or 300 hours, whichever occurs first). Lubricate the linkage.

150 000 km (90,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Replace the fuel filter(s) (or every 12 months, whichever occurs first). (3)
    • Replace the air cleaner filter (or every 24 months, whichever occurs first). (3, 4, 27)
    • Perform the steering system service. (13)
    • Perform the front and the rear suspension service. (14)
    • Perform the spring-to-axle U-bolts and the shackle bolts service. (16)
    • Perform the exhaust system service. (3, 4, 17)
    • Perform the air brake service (or every 6 months, whichever occurs first). (39)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic brake caliper service (or every 6 months, whichever occurs first). (22)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Inspect the clutch pedal free travel. (10)
    • Perform the spark plugs service (or every 30 months, whichever occurs first). (3, 28)
    • Perform the engine timing service (or every 30 months, whichever occurs first). (3, 4, 29).
    • Perform the air brake automatic slack adjuster service (or every 500 hours, whichever occurs first). (40)
    • Clean the air brake application valve (or every 3 months or 300 hours, whichever occurs first). Lubricate the linkage. Refer to Air Brake Valves.

155 000 km (93,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (3, 6)

160 000 km (96,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)
    • Perform the chassis lubrication service (or every 6 months, whichever occurs first). (12)
    • Perform the wheel bearing (grease) service (or every 24 months, whichever occurs first and whenever the hubs are removed). (23)
    • Perform the wheels and tires service. (15)
    • Perform the hydraulic brake service (or every 6 months, whichever occurs first). (7)
    • Perform the hydraulic parking brake service (or every 6 months, whichever occurs first). (8)
    • Perform the engine drive belts service (or every 12 months, whichever occurs first). (18)
    • Inspect the clutch pedal free travel. (10)
    • Perform the throttle linkage service. (19)
    • Perform the thermostatically controlled engine cooling fan service. (4, 20)
    • Perform the shields and the undercab insulation service. (4, 5, 21)
    • Perform the air intake system service (or every 24 months, whichever occurs first). (4, 5, 24)
    • Inspect the thermostatically controlled air cleaner (or every 24 months, whichever occurs first). (3, 4, 25)
    • Perform the ECS service, if equipped (or every 24 months, whichever occurs first). (3, 26)
    • Perform the rear axle air shift motor service. (11)
    • Inspect the operation of the air brake relay valve for leaks (or every month or every 300 hours, whichever occurs first).
    • Perform the air brake chamber service (or every 2 months, whichever occurs first). (41)
    • Perform the trailer brake hand control valve service (or every 3 months, or 900 hours, whichever occurs first). (42)

165 000 km (99,000 mi) (Except 6.5L)

    • Change the engine oil and the filter. (3, 9)
    • Inspect the fluid levels (or every 3 months, whichever occurs first). (6, 47, 48)

166 000 km (100,000 mi) (All Engines Except GM Diesel)

    • Change the power steering fluid (or every 36 months, whichever occurs first). (13)
    • Perform the front axle service (or every 36 months, whichever occurs first). (38)
    • Perform the rear axle service for the Eaton®, Rockwell®, or Spicer® Axles (or every 12 months, whichever occurs first). (1, 37)
    • Perform the exhaust brake service, if equipped. Inspect for excessive spindle free play and smooth operation. Lubricate the ball joint cap.
    • Replace the accelerator control cable (diesel) (or every 36 months, whichever occurs first). (19)
    • Perform the air brake service (or every 12 months, or 3,600 hours, whichever occurs first). (44)

240 000 km (150,000 mi)

Perform the cooling system service (or every 60 months since the last service, whichever occurs first). (3, 35)

320 000 km (200,000 mi)

Remove, disassemble, clean, and inspect the air brake trailer supply valve (or every 2 years or 7,200 hours, whichever occurs first).

400 000 km (250,000 mi)

    • Perform the wheel bearing service for the Eaton® Axle (oil filled) (or every 36 months, whichever occurs first). (2, 23)
    • Perform the rear axle service for the Eaton®, Rockwell®, or Spicer® Axles (or every 36 months, whichever occurs first). (2, 37)
    • Change the manual transmission fluid (or every 60 months, whichever occurs first).

480 000 km (300,000 mi)

Remove, disassemble, clean, and inspect the air brake air dryer (or every 3 years or 10,800 hours, whichever occurs first). Replace the dessicant on the Bendix® AD-9 units.