What oil does a 1987 GMC Jimmy 6.2L Diesel take?
For the 1987 GMC Jimmy with the 6.2L 8-cylinder Engine Code [C] Diesel, the recommended oil viscosity is SAE 5W-30, which is preferred for all temperatures. The engine oil capacity is 7 quarts when performing a change with a new filter. AMSOIL recommends using Signature Series 5W-30 100% Synthetic Max-Duty Diesel Oil (DHDQT-EA) for optimal protection.
AMSOIL product recommendations
Based on the AMSOIL lookup for your 1987 GMC Jimmy 6.2L Diesel, the following products are recommended to maintain engine and system health.
Engine Oil & Filter
| Product Name | Part Number |
|---|---|
| AMSOIL Signature Series 5W-30 100% Synthetic Max-Duty Diesel Oil | DHDQT-EA |
| AMSOIL Oil Filter | EAO24-EA |
| WIX Oil Filter | 51061-EA |
Coolant & Transmission
| Product Name | Part Number |
|---|---|
| AMSOIL Passenger Car & Light Truck Antifreeze & Coolant | ANTPC1G-EA |
| AMSOIL Propylene Glycol Antifreeze and Engine Coolant | ANT1G-EA |
| AMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF | ATLPK-EA |
| AMSOIL OE Fuel-Efficient 100% Synthetic ATF | OTLQT-EA |
Air & Fuel Filters
No specific air filter or fuel filter recommendations are available from the source data for this vehicle.
Engine Oil Specifications
Proper lubrication is critical for the longevity of the 6.2L diesel engine. Always verify your current oil level after a refill.
Oil Viscosity & Grade
| Condition | Viscosity/Grade |
|---|---|
| Preferred (All Temps) | SAE 5W-30 |
| Above -18°C | 10W-30 |
| Above 4°C | 30 |
| Oil Grade | CF-4 |
Oil Capacity
| Description | Capacity |
|---|---|
| With Filter Change | 7 quarts |
Note: After refill, always check the oil level manually.
Automatic Transmission Fluid Details
The 1987 GMC Jimmy utilizes specific automatic transmissions that require careful fluid selection. Note that manufacturer technical service bulletins may have updated specifications.
THM400 (3-Speed)
| Type | Capacity |
|---|---|
| Initial Fill | 4.3 quarts |
| Total Fill | 10.6 quarts |
Note: The AMSOIL lookup notes that this specification has been updated from Dexron II or III to Dexron VI per a manufacturer Technical Service Bulletin.
THM700-R4 (4-Speed)
| Type | Capacity |
|---|---|
| Initial Fill | 5 quarts |
| Total Fill | 11.5 quarts |
Note: The AMSOIL lookup notes that this specification has been updated from Dexron II or III to Dexron VI per a manufacturer Technical Service Bulletin.
Coolant Specifications
Maintaining the cooling system is vital for thermal management in diesel engines. The total capacity for the cooling system is 24.8 quarts.
| Product Type | Formulation Note |
|---|---|
| AMSOIL Passenger Car & Light Truck | Ethylene glycol 50/50 pre-mix |
| AMSOIL Propylene Glycol | Concentrated (requires mixing with distilled or high-quality water) |
Common diesel oil-related concerns and how AMSOIL products may help
Diesel engines face unique stresses including soot loading and extreme temperature fluctuations. The following table outlines how specific AMSOIL products can support your maintenance needs.
| Concern | Why it matters | AMSOIL Product | How it may help | Limitation |
|---|---|---|---|---|
| Engine Wear | Diesel combustion creates high pressure and friction. | DHDQT-EA | Delivers 6X more wear protection based on Detroit Diesel testing. | Requires regular oil changes. |
| Contaminants | Small particles can cause abrasive wear. | EAO24-EA | Provides 99% filtering efficiency at 20 microns. | Filter must be replaced per interval. |
| Extreme Temps | Viscosity changes can affect lubrication during startup or heavy load. | DHDQT-EA | Excels in extreme temperatures and maintains proper thickness. | Not confirmed for all specific ambient conditions. |
Diesel maintenance notes for this vehicle
Owners of 1980s GM diesel engines should prioritize fuel system integrity and cooling system efficiency. These engines are sensitive to fuel quality and require consistent maintenance of glow plugs, fuel filters, and injection components. Because these vehicles were often used for utility or towing, inspecting suspension components and drivetrain seals is a common research topic for long-term preservation.
Common maintenance concerns for this vehicle
Based on owner reports and historical context, the following areas should be monitored:
- Fuel System Integrity: Diesel engines of this era are sensitive to fuel quality.
- Thermal Management: Ensure the cooling system is efficient to prevent overheating during heavy-duty use.
- Drivetrain Seals: Inspecting seals and suspension components is recommended for long-term preservation, especially if used for towing.
Note: If a mechanical failure occurs, proper diagnosis or repair may still be required; fluids are designed to support protection, not repair damage.
Recall, TSB, and manufacturer communication notes
NHTSA Recall Information
A recall record was identified for the 1987 GMC Jimmy regarding Exterior Lighting (Campaign 06E026000). Certain replacement lamps may fail to conform to federal safety standards due to a lack of amber side reflectors, which could result in poor illumination.
Action Required: Owners should verify their vehicle’s status and contact the manufacturer or authorized dealers. Always verify open recalls by VIN through official NHTSA channels.
NHTSA Complaint Patterns
The following are summaries of owner-reported concerns (not verified defects):
- Engine/Cooling: Reports of smoke and fire incidents. One report noted a potential cause related to spilled oil on the engine during a refill.
- Fuel System: Reports of fuel odors or leaks near the tank.
- Electrical/Visibility: Various reports regarding electrical system issues and visibility components.
About this vehicle
The 1987 GMC Jimmy represents a specific era in General Motors’ SUV history. Given the engine specification of a 6.2L V8 diesel, this vehicle is part of the full-size lineage, which historically served as a counterpart to the long-wheelbase Suburban and was later transitioned into the GMC Yukon nameplate.
The 6.2L diesel engine is a significant component of this vehicle’s identity. This engine family was often utilized in utility and towing applications, making it a popular choice for those requiring robust torque and durability compared to gasoline counterparts. Owners of these vintage diesel SUVs typically focus on heavy-duty reliability and thermal management.
Because the specific technical details for the ‘C’ engine code were not fully detailed in all research snippets, broader 6.2L diesel engine family specifications should be verified through official service manuals before performing deep mechanical work. Maintenance of this vehicle requires a focus on fuel quality and cooling efficiency to ensure long-term operation.
Common questions about this vehicle’s diesel oil and maintenance
What is the oil capacity for my 1987 GMC Jimmy 6.2L Diesel?
The capacity is 7 quarts when including a filter change. Always check the level after refilling.
Which AMSOIL oil is best for this engine?
AMSOIL recommends Signature Series 5W-30 100% Synthetic Max-Duty Diesel Oil (DHDQT-EA).
What transmission fluid should I use for the THM400?
The AMSOIL lookup notes that while original specs may have been Dexron II or III, the manufacturer has updated this to Dexron VI. AMSOIL offers Signature Series Fuel-Efficient ATF (ATLPK-EA) for this application.
How often should I change my diesel oil?
While specific intervals depend on usage, AMSOIL products are designed to help confidently extend drain intervals compared to conventional oils.
Does the 6.2L engine require a specific viscosity?
The lookup recommends SAE 5W-30 for all temperatures, though 10W-30 is noted for use above -18°C.
How can I check for open recalls on my Jimmy?
You should always verify open recalls by checking your specific VIN through the NHTSA website or an authorized GMC dealer.
Disclaimer: This information is derived from provided source data. Always consult your owner’s manual and professional mechanics for vehicle-specific maintenance and repair.