Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1984 Suburban 2WD.
The 1984 GMC Truck Suburban 2WD is the two-wheel-drive variant of GMC’s Suburban truck line, and its routine service specification calls for 5 quarts of engine oil in viscosities of 20W-20, 15W-40, or 5W-30. Reliability data for this specific year is sparse but clean: it has generated only 5 owner complaints, with tires standing out as the top complaint area, and has logged 0 recalls. That profile sits outside the broader model complaint history, which spans 1990–2004 and ranges from a high of 480 complaints in 1994 down to a single complaint in 2004. For researchers, the 1984 model therefore predates the documented surge in reported issues and carries no recall exposure, though the low complaint count limits how much can be inferred about long-term durability.
Fluid capacities, tune-up values and fuel economy at a glance.
Capacities, torques and tune-up values from the factory service manual.
This engine holds 5 qt of 20W-20 / 15W-40 / 5W-30 engine oil, 80W-90 · GL-5 in the differential, DOT 3 brake fluid.
| Brake Fluid | DOT 3 |
| Differential Gear Oil | 80W-90 · GL-5 |
| Differential Gear Oil Capacity | 4.2 qt |
| Differential Gear Oil | 80W-90 · GL-5 |
| Differential Gear Oil Capacity | 27.0 qt |
| Differential Gear Oil | 80W-90 · GL-5 |
| Differential Gear Oil Capacity | 5.5 qt |
| Engine Coolant | ETHYLENE GLYCOL |
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
Owner complaints about the 1984 GMC Truck Suburban 2WD dominate in one area — the tires, 3 of 5 reports (60%), well ahead of the next concern. NHTSA has issued no recalls for this vehicle, so these are owner-reported concerns only. 2 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the tires pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.
All 5 complaints on record, top 3 components.
Source: NHTSA Office of Defects Investigation complaint database.
No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.
Showing 1 of 1 bulletins on record with NHTSA.
| Bulletin | Date | Component | Summary |
|---|---|---|---|
| 376602A | 1995-01-01 | Engine And Engine Cooling | NEW CAST IRON EXHAUST MANIFOLD AND STAINLESS STEEL GASKET TO CORRECT ENGINE NOISE… |
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
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Cross-vehicle references for the kinds of data on this page.
5 qt of ABOVE 40 degrees F: 30, ABOVE 20 degrees F: 20W-20, ABOVE 10 degrees F: 15W-40, BELOW 60 degrees F: 5W-30, per the factory manual.
NHTSA lists 0 recall campaign(s) for this model year. Check your specific vehicle by VIN.