Service quick specs OEM factory data
Capacities, torques and tune-up values from the factory service manual.
This engine holds 7 qt of 5W-30 API engine oil, 80W-90 · GL-5 in the differential, DOT 3 brake fluid. Torque lug nuts to 140 ft-lbs. The firing order is 1-8-4-3-6-5-7-2. 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
| Brake Fluid | DOT 3 |
| Differential Gear Oil | 80W-90 · GL-5 |
| Differential Gear Oil Capacity | 4.4 qt |
| Engine Oil | 5W-30 · API |
| Engine Oil Capacity | 7 qt |
Engine torques
| Crankshaft Pulley and/or Damper Bolts | 74 ft-lbs |
| Crankshaft Pulley and/or Damper Bolts | 110 ft-lbs |
| Cylinder Head Steps | Apply sealant GM P/N 12346004 |
| Cylinder Head Steps | Apply the thread sealant GM P/N 12346004 |
| Cylinder Head Steps | Apply sealer GM P/N 12346004 |
| Exhaust Manifold to Cylinder Head Bolts | 40 ft-lbs |
| Intake Manifold to Engine Bolts | 31.0 ft-lbs |
| Exhaust Manifold to Cylinder Head Bolts | 26.0 ft-lbs |
Chassis torques
| Leaf Spring to Axle (U-bolts) | 110.0-150.0 ft-lbs |
| Leaf Spring to Chassis Bracket | 110.0 ft-lbs |
| Leaf Spring Rear Shackle to Chassis Bracket | 70.0 ft-lbs |
| Lug Nuts | 140 ft-lbs |
| Front Wheel Hub | 165 ft-lbs |
Ignition
| Cylinder Firing Order | 1-8-4-3-6-5-7-2 |
| Cylinder Firing Order | 1-8-7-2-6-5-4-3 |
| Cylinder Firing Order | 1-8-4-3-6-5-7-2 |
| Spark Plug Manufacturer | AC Delco |
| Spark Plug Gap | 0.060 in |
| Spark Plug Torque | 14 ft-lbs |
Battery & A/C
| Refrigerant | R134a |
| Refrigerant Capacity | 1.80 lbs |
| Oil Group | PAG |
| Oil Type | 46 |
| Oil Capacity | 8.00 oz |
| Optional BCI Group Number | 78 |
| Optional BCI Cranking Performance | 690 cca |
| Standard BCI Group Number | 78 |
Service checks
| Pressure Test | 20 psi |
| Radiator Cap Pressure Relief | 15 psi |
| Thermostat Opening Temperature | 188-206 °F |
| Fuel Pump Pressure Minimum | 66.0 psi |
| Key ON Engine OFF (KOEO) | 60-66 |
| RPM | 50-63 @ Idle rpm |
| Engine Compression | 100 |
| Engine Compression | 380 |
Brakes
| Torque Caliper to Bracket | 15 ft-lbs |
| Torque to Knuckle | 38 ft-lbs |
| Minimum Pad Thickness | Front: 0.030; Rear: 0.030 specification |
| Drum Runout Limit | 0.006 in |
| Drum Nominal Diameter | 10 in / 11.15 in / 13 in |
| Drum Maximum Machining | 10.05 in / 11.21 in / 13.06 in |
| Drum Discard at-or-over | 10.09 / 11.24 / 13.09 |
| Rotor Max Parallel Variation | 0.001 in / 0.0005 in |
Multi-step torque procedures OEM · verified
Cylinder Head — tightening sequence 2 stages
| 1 | 22 ft. lbs. | 22 ft. lbs |
| 2 | long bolts | 75 degrees |
Cylinder Head — tightening sequence 4 stages
| 1 | 20 ft. lbs. | 20 ft. lbs |
| 2 | 55 ft. lbs. | 55 ft. lbs |
| 3 | 55 ft. lbs. | 55 ft. lbs |
| 4 | 90 |
Cylinder Head — tightening sequence 2 stages
| 1 | 37 ft. lbs. | 37 ft. lbs |
| 2 | bolts 1, 2, 3, 6, 8, 9, 12, 13, 14, 15, 16 | 150 degrees |
Intake Manifold to Engine Bolts — tightening sequence 1 stages
| 1 | 22 ft. lbs., step 2: 30 | 22 ft. lbs |
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
Intake Manifold to Engine Bolts — tightening sequence 1 stages
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 100,000 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 | Axle Shaft Oil Seal (inspect) · CV Joint Boot (inspect) · Differential (inspect fluid level) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate) |
| Every 15,000 mi | Air Intake System (inspect) · Cabin Air Filter (replace) · Radiator Fan Assembly (inspect) · Underbody Splash Shield (inspect) |
| Every 30,000 mi | Fuel Filter (replace) |
| Every 50,000 mi | Transfer Case Assembly (drain & refill) · Transmission Fluid & Filter (replace) |
| Every 60,000 mi | Accessory Drive Belt (inspect) · EGR System (inspect) · Fuel Evaporative Emission Control System (inspect) |
| Every 100,000 mi | PCV Valve (inspect) · Spark Plug Wires (inspect) · Spark Plugs (replace) |
| At 150,000 mi | Engine Coolant System (drain, flush & refill) |