1999 GMC Sonoma Oil Type & Capacity: 5W-30 (4.5 quarts)
The 1999 GMC Sonoma takes 5W-30 motor oil — 4.5 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 4.5 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| 2D Pickup Extra Cab, 2.2 4, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup Extra Cab, 2.2 4, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup Extra Cab, 4.3 W, 4WD, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup Extra Cab, 4.3 W, 4WD, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup Extra Cab, 4.3 W, RWD, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup Extra Cab, 4.3 W, RWD, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup Extra Cab, 4.3 X, 4WD, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup Extra Cab, 4.3 X, 4WD, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup Extra Cab, 4.3 X, RWD, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup Extra Cab, 4.3 X, RWD, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup, 2.2 4, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup, 2.2 4, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup, 4.3 W, 4WD, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup, 4.3 W, 4WD, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup, 4.3 W, RWD, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup, 4.3 W, RWD, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup, 4.3 X, 4WD, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup, 4.3 X, 4WD, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup, 4.3 X, RWD, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 2D Pickup, 4.3 X, RWD, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 3D Pickup Extra Cab, 2.2 4, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 3D Pickup Extra Cab, 2.2 4, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 3D Pickup Extra Cab, 4.3 W, 4WD, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 3D Pickup Extra Cab, 4.3 W, 4WD, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 3D Pickup Extra Cab, 4.3 W, RWD, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 3D Pickup Extra Cab, 4.3 W, RWD, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 3D Pickup Extra Cab, 4.3 X, 4WD, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 3D Pickup Extra Cab, 4.3 X, 4WD, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 3D Pickup Extra Cab, 4.3 X, RWD, Automatic | API - SAE 5W-30 | 4.50 QTS. | — | — |
| 3D Pickup Extra Cab, 4.3 X, RWD, Standard | API - SAE 5W-30 | 4.50 QTS. | — | — |
Complete Oil Change Bundle for 1999 GMC Sonoma
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More factory specs & repair guides for your Sonoma
🛞 1999 GMC Sonoma Tire Size & Pressure →🌧️ 1999 GMC Sonoma Wiper Blade Sizes →💡 1999 GMC Sonoma Light Bulb Sizes →📖 1999 GMC Sonoma Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
11.5 quarts (10.88 L) — 50/50 mixture of DEX-COOL and clean, drinkable water
Frequently asked questions
What type of oil does a 1999 GMC Sonoma take?
The 1999 GMC Sonoma takes 5W-30 motor oil (API - SAE 5W-30), per the factory service manual.
What is the oil capacity of a 1999 GMC Sonoma?
The 1999 GMC Sonoma oil capacity is 4.5 quarts with a filter change.
How often should I change the oil in my 1999 GMC Sonoma?
Most 1999 GMC Sonoma owners follow a 5,000–7,500 mile interval with conventional oil, or up to 10,000 miles with full synthetic. Always check the oil life monitor if equipped, and consult your owner's manual — GMC recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 1999 GMC Sonoma?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1999 GMC Sonoma. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.