Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
1991 GMC Suburban R2500, 6.2 J
Quick Lookups: Fluids
1991 GMC Suburban R2500, 6.2 JSECTION Fluids
| FLUID CAPACITIES | |||||||
|---|---|---|---|---|---|---|---|
| Fluid Type | Application | Standard | Metric | Fluid Spec | Note | S/H | |
| Air Cond Refrigerant | Front & Rear | 5.25 LBS. | 2.38 KG | R-12 | S | ||
| Air Cond Refrigerant | Front | 3.25 LBS. | 1.47 KG | R-12 | S | ||
| Automatic Transmission Fluid | Drain and Refill | 5.00 QTS. | 4.73 L | Automatic Transmission Fluid DEXRON VI | Refer to TSB No. 04-07-30-037C, Date of Issue: April 11, 2007. | S | |
| Automatic Transmission Fluid | Overhaul | 11.50 QTS. | 10.88 L | Automatic Transmission Fluid DEXRON VI | Refer to TSB No. 04-07-30-037C, Date of Issue: April 11, 2007. | S | |
| Brake Fluid | N/A | N/A | DOT 3 Brake Fluid | S | |||
| Differential Gear Oil | Rear,10 1/2" ring gear | 3.25 QTS. | 3.07 L | API - GL-5, SAE 80W or 80W-90 Gear Oil | S | ||
| Differential Gear Oil | Rear,8 1/2" Ring Gear | 2.10 QTS. | 1.98 L | API - GL-5, SAE 80W or 80W-90 Gear Oil | S | ||
| Differential Gear Oil | Rear,9 1/2" Ring Gear | 3.25 QTS. | 3.07 L | API - GL-5, SAE 80W or 80W-90 Gear Oil | S | ||
| Engine Coolant | Eng VIN J | 25.00 QTS. | 23.65 L | 56/44 mixture of Ethylene Glycol Base Antifreeze and water | GM Specification 1825-M. | S | |
| Engine Oil | Eng VIN J | 7.00 QTS. | 6.62 L | API - SAE 10W-30 or 15W-40 | S | ||
| Fuel Tank | Diesel | NE2 Option | 41.00 GALS. | 155.2 L | S | ||
| Fuel Tank | Diesel | Standard | 32.00 GALS. | 121.13 L | S | ||
| Manual Transmission Fluid | 4 Spd Trans | Side shift, side load | 4.20 QTS. | 3.97 L | Automatic Transmission Fluid DEXRON III | S | |
| Manual Transmission Fluid | 4 Spd Trans | Top shift, iron case | 4.20 QTS. | 3.97 L | Gear Lubricant Special | S | |
| Power Steering Fluid | N/A | N/A | GM Power Steering Fluid | GM Part No. 1050017. | S | ||
| Transfer Case Fluid | 5.00 QTS. | 4.73 L | Automatic Transmission Fluid DEXRON II | S | |||
| Windshield Washer Fluid | N/A | N/A | Optikleen Windshield Washer Fluid | Follow the Manufacturer's Instructions for the mixture ratio. | S | ||
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.