1991 GMC Sonoma Oil Type & Capacity
The 1991 GMC Sonoma oil type depends on the engine: the Base, 2D Pickup Extra Cab, 2.5 A, Automatic, 4L60/MD8 takes 5W-30 (3.5 quarts with filter); the Base, 2D Pickup Extra Cab, 2.5 A, Automatic, 700R4/MD8 takes 5W-30 (3.5 quarts with filter); the Base, 2D Pickup Extra Cab, 2.5 A, Standard takes 5W-30 (3.5 quarts with filter); the Base, 2D Pickup Extra Cab, 2.5 E, Automatic, 4L60/MD8 takes 5W-30 (3.5 quarts with filter); the Base, 2D Pickup Extra Cab, 2.5 E, Automatic, 700R4/MD8 takes 5W-30 (3.5 quarts with filter); the Base, 2D Pickup Extra Cab, 2.5 E, Standard takes 5W-30 (3.5 quarts with filter); the Base, 2D Pickup Extra Cab, 2.8 R takes 5W-30 (4.5 quarts with filter); the Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Automatic, 4L60/MD8 takes 5W-30 (4.5 quarts with filter); the Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Automatic, 700R4/MD8 takes 5W-30 (4.5 quarts with filter); the Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Standard takes 5W-30 (4.5 quarts with filter); the Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Automatic, 4L60/MD8 takes 5W-30 (4.5 quarts with filter); the Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Automatic, 700R4/MD8 takes 5W-30 (4.5 quarts with filter); the Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Standard takes 5W-30 (4.5 quarts with filter); the Base, 2D Pickup, 2.5 A, Automatic, 4L60/MD8 takes 5W-30 (3.5 quarts with filter); the Base, 2D Pickup, 2.5 A, Automatic, 700R4/MD8 takes 5W-30 (3.5 quarts with filter); the Base, 2D Pickup, 2.5 A, Standard takes 5W-30 (3.5 quarts with filter); the Base, 2D Pickup, 2.5 E, Automatic, 4L60/MD8 takes 5W-30 (3.5 quarts with filter); the Base, 2D Pickup, 2.5 E, Automatic, 700R4/MD8 takes 5W-30 (3.5 quarts with filter); the Base, 2D Pickup, 2.5 E, Standard takes 5W-30 (3.5 quarts with filter); the Base, 2D Pickup, 2.8 R takes 5W-30 (4.5 quarts with filter); the Base, 2D Pickup, 4.3 Z, 4WD, Automatic, 4L60/MD8 takes 5W-30 (4.5 quarts with filter); the Base, 2D Pickup, 4.3 Z, 4WD, Automatic, 700R4/MD8 takes 5W-30 (4.5 quarts with filter); the Base, 2D Pickup, 4.3 Z, 4WD, Standard takes 5W-30 (4.5 quarts with filter); the Base, 2D Pickup, 4.3 Z, RWD, Automatic, 4L60/MD8 takes 5W-30 (4.5 quarts with filter); the Base, 2D Pickup, 4.3 Z, RWD, Automatic, 700R4/MD8 takes 5W-30 (4.5 quarts with filter); the Base, 2D Pickup, 4.3 Z, RWD, Standard takes 5W-30 (4.5 quarts with filter); the Syclone, 4L60/MD8 takes 5W-30 (4.5 quarts with filter); the Syclone, 700R4/MD8 takes 5W-30 (4.5 quarts with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- Base, 2D Pickup Extra Cab, 2.5 A, Automatic, 4L60/MD8: 5W-30, 3.5 quarts with filter
- Base, 2D Pickup Extra Cab, 2.5 A, Automatic, 700R4/MD8: 5W-30, 3.5 quarts with filter
- Base, 2D Pickup Extra Cab, 2.5 A, Standard: 5W-30, 3.5 quarts with filter
- Base, 2D Pickup Extra Cab, 2.5 E, Automatic, 4L60/MD8: 5W-30, 3.5 quarts with filter
- Base, 2D Pickup Extra Cab, 2.5 E, Automatic, 700R4/MD8: 5W-30, 3.5 quarts with filter
- Base, 2D Pickup Extra Cab, 2.5 E, Standard: 5W-30, 3.5 quarts with filter
- Base, 2D Pickup Extra Cab, 2.8 R: 5W-30, 4.5 quarts with filter
- Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Automatic, 4L60/MD8: 5W-30, 4.5 quarts with filter
- Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Automatic, 700R4/MD8: 5W-30, 4.5 quarts with filter
- Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Standard: 5W-30, 4.5 quarts with filter
- Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Automatic, 4L60/MD8: 5W-30, 4.5 quarts with filter
- Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Automatic, 700R4/MD8: 5W-30, 4.5 quarts with filter
- Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Standard: 5W-30, 4.5 quarts with filter
- Base, 2D Pickup, 2.5 A, Automatic, 4L60/MD8: 5W-30, 3.5 quarts with filter
- Base, 2D Pickup, 2.5 A, Automatic, 700R4/MD8: 5W-30, 3.5 quarts with filter
- Base, 2D Pickup, 2.5 A, Standard: 5W-30, 3.5 quarts with filter
- Base, 2D Pickup, 2.5 E, Automatic, 4L60/MD8: 5W-30, 3.5 quarts with filter
- Base, 2D Pickup, 2.5 E, Automatic, 700R4/MD8: 5W-30, 3.5 quarts with filter
- Base, 2D Pickup, 2.5 E, Standard: 5W-30, 3.5 quarts with filter
- Base, 2D Pickup, 2.8 R: 5W-30, 4.5 quarts with filter
- Base, 2D Pickup, 4.3 Z, 4WD, Automatic, 4L60/MD8: 5W-30, 4.5 quarts with filter
- Base, 2D Pickup, 4.3 Z, 4WD, Automatic, 700R4/MD8: 5W-30, 4.5 quarts with filter
- Base, 2D Pickup, 4.3 Z, 4WD, Standard: 5W-30, 4.5 quarts with filter
- Base, 2D Pickup, 4.3 Z, RWD, Automatic, 4L60/MD8: 5W-30, 4.5 quarts with filter
- Base, 2D Pickup, 4.3 Z, RWD, Automatic, 700R4/MD8: 5W-30, 4.5 quarts with filter
- Base, 2D Pickup, 4.3 Z, RWD, Standard: 5W-30, 4.5 quarts with filter
- Syclone, 4L60/MD8: 5W-30, 4.5 quarts with filter
- Syclone, 700R4/MD8: 5W-30, 4.5 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Base, 2D Pickup Extra Cab, 2.5 A, Automatic, 4L60/MD8 — 2.5L Eng,Eng VIN A | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 2.5 A, Automatic, 4L60/MD8 — 2.5L Eng,Eng VIN E | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 2.5 A, Automatic, 700R4/MD8 — 2.5L Eng,Eng VIN A | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 2.5 A, Automatic, 700R4/MD8 — 2.5L Eng,Eng VIN E | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 2.5 A, Standard — 2.5L Eng,Eng VIN A | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 2.5 A, Standard — 2.5L Eng,Eng VIN E | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 2.5 E, Automatic, 4L60/MD8 — 2.5L Eng,Eng VIN E | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 2.5 E, Automatic, 700R4/MD8 — 2.5L Eng,Eng VIN E | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 2.5 E, Standard — 2.5L Eng,Eng VIN E | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 2.8 R — 2.8L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Automatic, 4L60/MD8 — 4.3L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Automatic, 700R4/MD8 — 4.3L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Standard — 4.3L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Automatic, 4L60/MD8 — 4.3L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Automatic, 700R4/MD8 — 4.3L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Standard — 4.3L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Base, 2D Pickup, 2.5 A, Automatic, 4L60/MD8 — 2.5L Eng,Eng VIN A | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup, 2.5 A, Automatic, 4L60/MD8 — 2.5L Eng,Eng VIN E | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup, 2.5 A, Automatic, 700R4/MD8 — 2.5L Eng,Eng VIN A | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup, 2.5 A, Automatic, 700R4/MD8 — 2.5L Eng,Eng VIN E | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup, 2.5 A, Standard — 2.5L Eng,Eng VIN A | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup, 2.5 A, Standard — 2.5L Eng,Eng VIN E | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup, 2.5 E, Automatic, 4L60/MD8 — 2.5L Eng,Eng VIN E | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup, 2.5 E, Automatic, 700R4/MD8 — 2.5L Eng,Eng VIN E | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup, 2.5 E, Standard — 2.5L Eng,Eng VIN E | API - SAE 5W-30 | 3.50 QTS. | 3.00 QTS. | — |
| Base, 2D Pickup, 2.8 R — 2.8L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Base, 2D Pickup, 4.3 Z, 4WD, Automatic, 4L60/MD8 — 4.3L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Base, 2D Pickup, 4.3 Z, 4WD, Automatic, 700R4/MD8 — 4.3L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Base, 2D Pickup, 4.3 Z, 4WD, Standard — 4.3L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Base, 2D Pickup, 4.3 Z, RWD, Automatic, 4L60/MD8 — 4.3L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Base, 2D Pickup, 4.3 Z, RWD, Automatic, 700R4/MD8 — 4.3L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Base, 2D Pickup, 4.3 Z, RWD, Standard — 4.3L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Syclone, 4L60/MD8 — 4.3L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Syclone, 700R4/MD8 — 4.3L Eng | API - SAE 5W-30 | 4.50 QTS. | 4.00 QTS. | — |
Buy the right oil
Buy 5W-30 motor oil on Amazon1991 GMC Sonoma oil filter on AmazonAs an Amazon Associate we earn from qualifying purchases made through these links.
More specs & repair guides for your Sonoma
1991 GMC Sonoma factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
11.5 quarts (10.88 L) — 56/44 mixture of Ethylene Glycol Base Antifreeze and water. GM Specification 1825-M.
Frequently asked questions
What type of oil does a 1991 GMC Sonoma take?
It depends on the engine: Base, 2D Pickup Extra Cab, 2.5 A, Automatic, 4L60/MD8 uses 5W-30; Base, 2D Pickup Extra Cab, 2.5 A, Automatic, 700R4/MD8 uses 5W-30; Base, 2D Pickup Extra Cab, 2.5 A, Standard uses 5W-30; Base, 2D Pickup Extra Cab, 2.5 E, Automatic, 4L60/MD8 uses 5W-30; Base, 2D Pickup Extra Cab, 2.5 E, Automatic, 700R4/MD8 uses 5W-30; Base, 2D Pickup Extra Cab, 2.5 E, Standard uses 5W-30; Base, 2D Pickup Extra Cab, 2.8 R uses 5W-30; Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Automatic, 4L60/MD8 uses 5W-30; Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Automatic, 700R4/MD8 uses 5W-30; Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Standard uses 5W-30; Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Automatic, 4L60/MD8 uses 5W-30; Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Automatic, 700R4/MD8 uses 5W-30; Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Standard uses 5W-30; Base, 2D Pickup, 2.5 A, Automatic, 4L60/MD8 uses 5W-30; Base, 2D Pickup, 2.5 A, Automatic, 700R4/MD8 uses 5W-30; Base, 2D Pickup, 2.5 A, Standard uses 5W-30; Base, 2D Pickup, 2.5 E, Automatic, 4L60/MD8 uses 5W-30; Base, 2D Pickup, 2.5 E, Automatic, 700R4/MD8 uses 5W-30; Base, 2D Pickup, 2.5 E, Standard uses 5W-30; Base, 2D Pickup, 2.8 R uses 5W-30; Base, 2D Pickup, 4.3 Z, 4WD, Automatic, 4L60/MD8 uses 5W-30; Base, 2D Pickup, 4.3 Z, 4WD, Automatic, 700R4/MD8 uses 5W-30; Base, 2D Pickup, 4.3 Z, 4WD, Standard uses 5W-30; Base, 2D Pickup, 4.3 Z, RWD, Automatic, 4L60/MD8 uses 5W-30; Base, 2D Pickup, 4.3 Z, RWD, Automatic, 700R4/MD8 uses 5W-30; Base, 2D Pickup, 4.3 Z, RWD, Standard uses 5W-30; Syclone, 4L60/MD8 uses 5W-30; Syclone, 700R4/MD8 uses 5W-30.
How much oil does a 1991 GMC Sonoma take?
Capacity depends on the engine: Base, 2D Pickup Extra Cab, 2.5 A, Automatic, 4L60/MD8 holds 3.5 quarts with filter; Base, 2D Pickup Extra Cab, 2.5 A, Automatic, 700R4/MD8 holds 3.5 quarts with filter; Base, 2D Pickup Extra Cab, 2.5 A, Standard holds 3.5 quarts with filter; Base, 2D Pickup Extra Cab, 2.5 E, Automatic, 4L60/MD8 holds 3.5 quarts with filter; Base, 2D Pickup Extra Cab, 2.5 E, Automatic, 700R4/MD8 holds 3.5 quarts with filter; Base, 2D Pickup Extra Cab, 2.5 E, Standard holds 3.5 quarts with filter; Base, 2D Pickup Extra Cab, 2.8 R holds 4.5 quarts with filter; Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Automatic, 4L60/MD8 holds 4.5 quarts with filter; Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Automatic, 700R4/MD8 holds 4.5 quarts with filter; Base, 2D Pickup Extra Cab, 4.3 Z, 4WD, Standard holds 4.5 quarts with filter; Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Automatic, 4L60/MD8 holds 4.5 quarts with filter; Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Automatic, 700R4/MD8 holds 4.5 quarts with filter; Base, 2D Pickup Extra Cab, 4.3 Z, RWD, Standard holds 4.5 quarts with filter; Base, 2D Pickup, 2.5 A, Automatic, 4L60/MD8 holds 3.5 quarts with filter; Base, 2D Pickup, 2.5 A, Automatic, 700R4/MD8 holds 3.5 quarts with filter; Base, 2D Pickup, 2.5 A, Standard holds 3.5 quarts with filter; Base, 2D Pickup, 2.5 E, Automatic, 4L60/MD8 holds 3.5 quarts with filter; Base, 2D Pickup, 2.5 E, Automatic, 700R4/MD8 holds 3.5 quarts with filter; Base, 2D Pickup, 2.5 E, Standard holds 3.5 quarts with filter; Base, 2D Pickup, 2.8 R holds 4.5 quarts with filter; Base, 2D Pickup, 4.3 Z, 4WD, Automatic, 4L60/MD8 holds 4.5 quarts with filter; Base, 2D Pickup, 4.3 Z, 4WD, Automatic, 700R4/MD8 holds 4.5 quarts with filter; Base, 2D Pickup, 4.3 Z, 4WD, Standard holds 4.5 quarts with filter; Base, 2D Pickup, 4.3 Z, RWD, Automatic, 4L60/MD8 holds 4.5 quarts with filter; Base, 2D Pickup, 4.3 Z, RWD, Automatic, 700R4/MD8 holds 4.5 quarts with filter; Base, 2D Pickup, 4.3 Z, RWD, Standard holds 4.5 quarts with filter; Syclone, 4L60/MD8 holds 4.5 quarts with filter; Syclone, 700R4/MD8 holds 4.5 quarts with filter.
Can I use synthetic oil in my 1991 GMC Sonoma?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1991 GMC Sonoma. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.