Service quick specs OEM factory data
Capacities, torques and tune-up values from the factory service manual.
This engine holds 5.0 qt of 5W-20 engine oil, GM DEXRON gear lubricant in the differential, DOT 3 brake fluid. Torque the oil drain plug to 15.0 ft-lbs. The firing order is 1-2-3-4-5-6. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.
Lubricants & capacities
| Automatic Transmission Fluid | DEXRON(R)-VI GM P/N 89020661 |
| Automatic Transmission Fluid Capacity | 6.7 |
| Brake Fluid | DOT 3 |
| Clutch Fluid | DOT 3 |
| Differential Gear Oil | SAE 75W |
| Differential Gear Oil Capacity | 8.0" |
| Differential Gear Oil | SAE 75W |
| Differential Gear Oil | GM DEXRON gear lubricant |
Engine torques
| Camshaft Bearing/Carrier Cap Bolts or Studs | 89 inch lbs. ft-lbs |
| Camshaft Bearing/Carrier Cap Bolts or Studs | 89 inch lbs. ft-lbs |
| Exhaust Manifold to Cylinder Head Bolts | 15 |
| Exhaust Manifold to Cylinder Head Bolts | 37 |
| Exhaust Manifold to Cylinder Head Bolts | 15.0 ft-lbs |
| Engine Oil Pan Drain Plug | 18.0 ft-lbs |
| Engine Oil Pan Drain Plug | 18.0 ft-lbs |
| Engine Oil Pan Drain Plug | 15.0 ft-lbs |
Chassis torques
| Driveshaft Flange to Transmission | 15.0 ft-lbs |
| Leaf Spring to Axle (U-bolts) | 56.0 ft-lbs |
| Leaf Spring to Chassis Bracket | 92.0 ft-lbs |
| Leaf Spring to Rear Shackle | 63.0 ft-lbs |
| Leaf Spring Rear Shackle to Chassis Bracket | 63.0 ft-lbs |
| Transfer Case Fill Plug | 29.0 ft-lbs |
| Transfer Case Drain Plug | 29.0 ft-lbs |
| Front Wheel Hub | Install a new nut and torque to 191.0 ft-lbs |
Ignition
| Cylinder Firing Order | 1-3-4-2 |
| Cylinder Firing Order | 1-2-3-4-5-6 |
| Cylinder Firing Order | 1-6-5-4-3-2 |
| Cylinder Firing Order | 1-3-4-2 |
| Cylinder Firing Order | 1-2-3-4-5-6 |
| Spark Plug Manufacturer | Ac Delco |
| Spark Plug Gap | .037 - .043 in |
| Spark Plug Torque | 13 ft-lbs |
Battery & A/C
| Refrigerant | R134a |
| Refrigerant Capacity | 1.37 lbs |
| Oil Group | PAG |
| Oil Capacity | 3.00 oz |
| Oil Type | 46 |
| Standard BCI Group Number | 86 |
| Standard BCI Cranking Performance | 590 cca |
| Standard BCI Group Number | 48 |
Service checks
| Pressure Test | 15 psi |
| Radiator Cap Pressure Relief | 15 psi |
| Thermostat Opening Temperature | 188-206 °F |
| Regulated Fuel System Pressure (With Vacuum) | 43-58 psi at idle psi |
| Key ON Engine OFF (KOEO) | 43-51 Diesel |
| Regulated Fuel System Pressure (With Vacuum) | 43-58 psi at idle psi |
| Key ON Engine OFF (KOEO) | 50-100 |
Brakes
| Brake Caliper Bolt to Carrier Torque | Front: 21; Rear: 25 /; Rear: 25 |
| Brake Caliper Carrier to Hub Bolt Torque | Front: 59; Rear: 74; Front: 59 Turn; Rear: 74 Replace |
| ABS Sensor Torque | 6.6 / NS |
| Minimum Pad Thickness | Front: 0.030; Rear: 0.030 specification |
| Vented Rotor Minimum Thickness for Replacement | Front: .980; Rear: .650 /; Front: 0.980 |
| Variation from Parallelism Thickness Variation | .0002 / 0.0002 |
| Maximum Rotor Runout | .002 / 0.002 |
Multi-step torque procedures OEM · verified
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
| 1 | 18.0 ft. lbs., Step 2: 110 | 18 ft. lbs |
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
| 1 | 22.0 ft. lbs., Step 2: loosen all bolts completely, Step 3: 18.0 ft. lbs., Step 4: 110 | 22 ft. lbs |
Cylinder Head — tightening sequence 5 stages
Prep Do not reuse old bolts. Coat new bolts lightly with specified motor oil. Do not allow any oil on cylinder head-or head bolt bosses. · M11 Bolts:
| 1 | 22.0 ft. lbs. | 22 ft. lbs |
| 2 | 150 degrees; M8 Bolts: | 150 degrees |
| 3 | 11.0 ft. lbs. | 11 ft. lbs |
| 4 | 75 degrees | 75 degrees |
| 5 | 110 degrees | 110 degrees |
Cylinder Head — tightening sequence 2 stages
Prep Do not reuse old bolts. Coat new bolts lightly with specified motor oil.
| 1 | 22.0 ft. lbs. | 22 ft. lbs |
| 2 | 190 degrees | 190 degrees |
Engine Flywheel Bolts — tightening sequence 1 stages
| 1 | 22.0 ft. lbs., Step 2: 40 | 22 ft. lbs |
Engine Flywheel Bolts — tightening sequence 1 stages
| 1 | 22.0 ft. lbs., Step 2: 45 | 22 ft. lbs |
Intake Manifold to Engine Bolts — tightening sequence 1 stages
| 1 | 8.8 ft. lbs., Step 2: 8.8 | 8.8 ft. lbs |
Factory maintenance schedule OEM · verified
Normal service, condensed from the factory interval matrix.
Under the factory schedule, replace the engine oil and filter every 7,500 mi; spark plugs every 97,500 mi; coolant at 150,000 mi. The big-interval services (at 150,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.
| Every 7,500 mi | Accelerator Pedal (inspect) · Body Latches, Locks & Hinges (lubricate) · Brake Shift Interlock Solenoid (inspect) · Brake System (inspect) · Engine Air Filter Element (inspect) · Engine Oil (inspect fluid level) |
| Every 22,500 mi | Cabin Air Filter (replace) |
| Every 45,000 mi | Brake Hydraulic System (drain, refill & bleed) · Clutch Hydraulic System (drain & refill) · Fuel Evaporative Emission Control System (inspect) |
| Every 97,500 mi | Spark Plug Wires (inspect) · Spark Plugs (replace) |
| At 150,000 mi | Accessory Drive Belt (inspect) · Engine Coolant System (drain, flush & refill) |