GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC P42 Commercial Chassis 🢒 General Information 🢒 Maintenance and Lubrication 🢒 Maintenance Schedule

Maintenance Schedule I

The services shown in this schedule up to 100,000  miles (166,000 km) should be performed after 100,000 miles (166,000 km) at the same intervals.

Footnotes

The California Air Resources Board has determined that the failure to perform this maintenance item will not nullify the emission warranty or limit recall liability prior to the completion of the vehicle useful life. We do urge, however, that ALL recommended maintenance be recorded.

For Drive Axle Service, perform the following:

    • Locking Differential--Drain the fluid and refill at first the engine oil change. At subsequent oil changes, check the fluid level and add fluid as needed. If driving in dusty areas or towing a trailer, drain fluid and refill every 15,000 miles (25,000 km).
    • Standard Differential--Check fluid level and add fluid as needed at every oil change. If driving in dusty areas or towing a trailer, drain fluid and refill every 15,000 miles (25,000 km).
    • More frequent lubrication may be required for heavy-duty or off-road use.

3,000 Miles (5 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

6,000 Miles (10 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.
    • Rotate the tires.

9,000 Miles (15 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

12,000 Miles (20 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

15,000 Miles (25 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Inspect the air cleaner filter if driving in dusty conditions. Replace filter, if necessary. An Emission Control Service
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.
    • Clean and repack the front wheel bearings (or at each brake relining, whichever occurs first).

18,000 Miles (30 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.
    • Rotate the tires.

21,000 Miles (35 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

24,000 Miles (40 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

27,000 Miles (45 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

30,000 Miles (45 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.
    • Inspect the engine accessory drive belt (or every 24 months, whichever occurs first). An Emission Control Service.
    • Drain, flush and refill cooling system (or every 24 months, whichever occurs first). Inspect the hoses. Clean the radiator, condenser and pressure cap. An Emission Control Service.
    • Clean and repack the front wheel bearings (or at each brake relining, whichever occurs first).
    • Replace the spark plugs (4.3L Engines). An Emission Control Service.
    • Inspect the air cleaner filter if driving in dusty conditions. Replace filter, if necessary. An Emission Control Service.
    • Rotate the tires.

33,000 Miles (55 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

36,000 Miles (60 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

39,000 Miles (65 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

42,000 Miles (70 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.
    • Rotate the tires.

45,000 Miles (75 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.
    • Inspect the air cleaner filter if driving in dusty conditions. Replace filter, if necessary. An Emission Control Service.

48,000 Miles (80 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

50,000 Miles (83 000 km)

    • Change automatic transmission fluid and filter if the vehicle is driven under one or more of these conditions:
       - In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher.
       - In hilly or mountainous terrain
       - When doing frequent trailer towing
       - Uses such as found in taxi, police, or delivery service
    • If you do not use your vehicle under any of these conditions, the fluid and filter do not require changing. If you do not use your vehicle under any of these conditions, the fluid and filter do not require changing. Manual transmission fluid does not require changing.

54,000 Miles (90 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.
    • Rotate the tires.

57,000 Miles (95 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

60,000 Miles (100 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.
    • Inspect the engine accessory drive belt (or every 24 months, whichever occurs first). An Emission Control Service.
    • Drain, flush and refill cooling system (or every 24 months, whichever occurs first). Inspect the hoses. Clean the radiator, condenser and pressure cap. An Emission Control Service.
    • Clean and repack the front wheel bearings (or at each brake relining, whichever occurs first).
    • Replace the spark plugs (4.3L Engines). An Emission Control Service.
    • Inspect the spark plug wires. An Emission Control Service.
    • Inspect the air cleaner filter if driving in dusty conditions. Replace filter, if necessary. An Emission Control Service.
    • Inspect the fuel tank, cap and lines for damage or leaks. Inspect fuel cap gasket for any damage. Replace parts as needed. An Emission Control Service.

63,000 Miles (105 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

66,000 Miles (110 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.
    • Rotate the tires.

69,000 Miles (115 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

72,000 Miles (120 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

75,000 Miles (125 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Inspect the air cleaner filter if driving in dusty conditions. Replace filter, if necessary. An Emission Control Service.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

78,000 Miles (130 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Inspect the air cleaner filter if driving in dusty conditions. Replace filter, if necessary. An Emission Control Service.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.
    • Rotate the tires.

81,000 Miles (135 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Inspect the air cleaner filter if driving in dusty conditions. Replace filter, if necessary. An Emission Control Service.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

84,000 Miles (140 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

87,000 Miles (145 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

90,000 Miles (150 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.
    • Inspect the engine accessory drive belt (or every 24 months, whichever occurs first). An Emission Control Service.
    • Drain, flush and refill cooling system (or every 24 months, whichever occurs first). Inspect the hoses. Clean the radiator, the condenser and the pressure cap. Pressure test the cooling system and the pressure cap. An Emission Control Service.
    • Replace the spark plugs (4.3L Engines). An Emission Control Service.
    • Inspect the air cleaner filter if driving in dusty conditions. Replace filter, if necessary. An Emission Control Service.
    • Rotate the tires.

93,000 Miles (155 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

96,000 Miles (160 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

99,000 Miles (166 000 km)

    • Change the engine oil and filter (every 3  months, whichever occurs first). An Emission Control Service.
    • Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propeller shaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 6 months, whichever occurs first.
    • Check rear axle fluid level and add fluid as needed. Check axle seals for leakage.

100,000 Miles (166 000 km)

    • Replace the spark plugs. An Emission Control Service.
    • Change automatic transmission fluid and filter if the vehicle is driven under one or more of these conditions:
       - In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher
       - In hilly or mountainous terrain
       - When doing frequent trailer towing
       - Uses such as found in taxi, police, or delivery service

If you do not use your vehicle under any of these conditions, the fluid and filter do not require changing. Manual transmission fluid does not require changing.