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Service Intervals & Specifications

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2003 GMC Sonoma, 2003 GMC Sierra, 2003 GMC Savana, 2003 GMC Safari, and 2003 GMC Jimmy. However, it is still accessible from the selected car via links, so may be relevant.
REPLACEMENT INTERVALS (ASTRO & SAFARI)

Component Interval (Miles)
Accessory Drive Belt (1) 60,000
Air Filter 30,000
Automatic Transfer Case Fluid 50,000
Automatic Transmission Fluid & Filter (2)
Engine Coolant 150,000
Fuel Filter 30,000
Oil & Oil Filter (3)
PCV Valve (1) 100,000
Spark Plugs 100,000
(1) Inspect and replace as necessary.
(2) If used under severe conditions, replace every 15,000 miles.
(3) If used under severe conditions, replace every 3000 miles or 3 months, whichever comes first. If used under normal conditions, replace every 7500 miles or 12 months, whichever comes first.
REPLACEMENT INTERVALS (BLAZER, JIMMY CANADIAN, SONOMA & S10 PICKUP)

Component Interval (Miles)
Accessory Drive Belt (1) 60,000
Air Filter 30,000
Automatic Transfer Case Fluid 50,000
Automatic Transmission Fluid & Filter (2)
Engine Coolant (3)
Fuel Filter 30,000
Oil & Oil Filter (4)
Spark Plugs 100,000
(1) Inspect and replace as necessary.
(2) If used under severe conditions, replace every 15,000 miles.
(3) Replace every 150,000 miles or 60 months, whichever comes first.
(4) Replace every 7500 miles or 12 months, whichever comes first.
REPLACEMENT INTERVALS (CHEVY EXPRESS & SAVANA)

Component Interval (Miles)
Accessory Drive Belt (1) 60,000
Air Filter 30,000
Automatic Transmission Fluid & Filter (2)
Engine Coolant 150,000
Fuel Filter 30,000
Oil & Oil Filter (3)
Spark Plugs 100,000
(1) Inspect and replace as necessary.
(2) If GVWR is greater than 8600 lbs (3900 kg) or is used under severe conditions, replace every 50,000 miles. If used under normal conditions, replace every 100,000 miles
(3) If used under severe conditions, replace every 3000 miles or 3 months, whichever comes first. If used under normal conditions, replace every 7500 miles or 12 months, whichever comes first.
REPLACEMENT INTERVALS (SIERRA & SILVERADO)

Component Interval (Miles)
Accessory Drive Belt (1) 60,000
Air Filter 30,000
Automatic Transfer Case Fluid 50,000
Automatic Transmission Fluid & Filter (2)
Engine Coolant 150,000
Fuel Filter 30,000
Manual Transmission Fluid 150,000
Oil & Oil Filter (3)
PCV (1) 100,000
Spark Plugs 100,000
(1) Inspect and replace as necessary.
(2) If GVWR is greater than 8600 lbs (3900 kg) or is used under severe conditions, replace every 50,000 miles. If used under normal conditions, replace every 100,000 miles.
(3) If used under severe conditions, replace every 3000 miles. If used under normal conditions, replace as indicated by CHANGE OIL SOON light or every 12 months, whichever comes first.
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