Service Intervals & Specifications

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

REPLACEMENT INTERVALS

Component

Interval (Miles)

Accessory Drive Belt

⁽¹⁾ 60,000

Air Filter

30,000

Automatic Transfer Case Fluid

50,000

Automatic Transmission Fluid & Filter

⁽²⁾

A/T External Control Main Filter (Allison Trans.)

7500

Engine Coolant

150,000

Fuel Filter

30,000

Manual Transmission Fluid

200,000

Oil & Oil Filter

⁽³⁾

PCV

100,000

⁽¹⁾	Inspect and replace as necessary.

⁽²⁾	If vehicle's GVWR is greater than 8600 lbs (3900 kg) or if 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.