2003 Chevrolet Suburban Oil Type & Capacity
The 2003 Chevrolet Suburban oil type depends on the engine: the C1500, 5.3 T takes 5W-30 (6.0 quarts with filter); the C1500, 5.3 Z takes 5W-30 (6.0 quarts with filter); the C2500, 6.0 U takes 5W-30 (6.0 quarts with filter); the C2500, 8.1 G takes 5W-30 (6.5 quarts with filter); the K1500, 5.3 T takes 5W-30 (6.0 quarts with filter); the K1500, 5.3 Z takes 5W-30 (6.0 quarts with filter); the K2500, 6.0 U takes 5W-30 (6.0 quarts with filter); the K2500, 8.1 G takes 5W-30 (6.5 quarts with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- C1500, 5.3 T: 5W-30, 6.0 quarts with filter
- C1500, 5.3 Z: 5W-30, 6.0 quarts with filter
- C2500, 6.0 U: 5W-30, 6.0 quarts with filter
- C2500, 8.1 G: 5W-30, 6.5 quarts with filter
- K1500, 5.3 T: 5W-30, 6.0 quarts with filter
- K1500, 5.3 Z: 5W-30, 6.0 quarts with filter
- K2500, 6.0 U: 5W-30, 6.0 quarts with filter
- K2500, 8.1 G: 5W-30, 6.5 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| C1500, 5.3 T — 5.3L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| C1500, 5.3 Z — 5.3L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| C2500, 6.0 U — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| C2500, 8.1 G — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | — |
| K1500, 5.3 T — 5.3L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| K1500, 5.3 Z — 5.3L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| K2500, 6.0 U — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| K2500, 8.1 G — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | — |
Buy the right oil
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More specs & repair guides for your Suburban
2003 Chevrolet Suburban factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
14.4 quarts (13.62 L) — 50/50 mixture of DEX-COOL and clean, drinkable water
Frequently asked questions
What type of oil does a 2003 Chevrolet Suburban take?
It depends on the engine: C1500, 5.3 T uses 5W-30; C1500, 5.3 Z uses 5W-30; C2500, 6.0 U uses 5W-30; C2500, 8.1 G uses 5W-30; K1500, 5.3 T uses 5W-30; K1500, 5.3 Z uses 5W-30; K2500, 6.0 U uses 5W-30; K2500, 8.1 G uses 5W-30.
How much oil does a 2003 Chevrolet Suburban take?
Capacity depends on the engine: C1500, 5.3 T holds 6.0 quarts with filter; C1500, 5.3 Z holds 6.0 quarts with filter; C2500, 6.0 U holds 6.0 quarts with filter; C2500, 8.1 G holds 6.5 quarts with filter; K1500, 5.3 T holds 6.0 quarts with filter; K1500, 5.3 Z holds 6.0 quarts with filter; K2500, 6.0 U holds 6.0 quarts with filter; K2500, 8.1 G holds 6.5 quarts with filter.
Can I use synthetic oil in my 2003 Chevrolet Suburban?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2003 Chevrolet Suburban. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.