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2004 GMC Truck Savana CNG

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2004 Savana CNG.

The 2004 GMC Truck Savana CNG takes 4.5 qt of 5W-30 engine oil.

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity4.5 qtOEM · verified

Engine oil type5W-30 APIOEM · verified

Lug nut torque140 ft-lbsOEM · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 78 · 600 CCA battery, OE oil filter 12731172. Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 78 · 600 CCAOEM · verified

OE service part numbers OEM · verified

Engine oil filter	12731172 alt 25322835
Engine air filter	22909882
Fuel filter	25171792 discontinued
Spark plug	12621258 alt 12681665
Battery	88866306 alt 88866305
Front wiper blades	15214346
Serpentine belt	12576447 alt 12637204
Thermostat	12600171 alt 12632948

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 4.5 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 oil drain plug to 18.0 ft-lbs. The firing order is 1-8-7-2-6-5-4-3. 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	ATF
Automatic Transmission Fluid Capacity	7.4
Brake Fluid	DOT 3
Differential Gear Oil	80W-90 · GL-5
Differential Gear Oil Capacity	6.6 qt
Differential Gear Oil	80W-90 · GL-5
Differential Gear Oil Capacity	5.5 qt
Engine Coolant	DEX-COOL OR EQUIVALENT

Engine torques

Cylinder Head Steps	Install the NEW cylinder head bolts.
Engine Oil Pan Drain Plug	18.0 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	18.0 ft-lbs
Engine Valve Cover Bolts	9.0 ft-lbs

Chassis torques

Leaf Spring to Axle (U-bolts)	103.0 ft-lbs
Leaf Spring to Chassis Bracket	107.0 ft-lbs
Leaf Spring to Rear Shackle	66.0 ft-lbs
Leaf Spring Rear Shackle to Chassis Bracket	66.0 ft-lbs
Lug Nuts	140 ft-lbs
Transfer Case Fill Plug	18.0 ft-lbs
Transfer Case Drain Plug	18.0 ft-lbs
Front Wheel Hub	155 ft-lbs

Ignition

Cylinder Firing Order	1-6-5-4-3-2
Cylinder Firing Order	1-8-7-2-6-5-4-3
Cylinder Firing Order	1-6-5-4-3-2
Cylinder Firing Order	1-8-7-2-6-5-4-3
Cylinder Firing Order	1-8-7-2-6-5-4-3
Spark Plug Manufacturer	AC Delco
Spark Plug Gap	0.060 in
Spark Plug Torque	11 ft-lbs

Battery & A/C

Refrigerant	R134a
Refrigerant Capacity	2.00 lbs
Oil Group	PAG
Oil Type	46
Oil Capacity	8.00 oz
Standard BCI Group Number	78
Standard BCI Cranking Performance	600 cca
Optional BCI Group Number	79

Service checks

Pressure Test	15 psi
Radiator Cap Pressure Relief	15 psi
Thermostat Opening Temperature	188-206 °F
Fuel Pump Pressure Minimum	62.0 psi
Key ON Engine OFF (KOEO)	55-62
RPM	45-59 @ Idle rpm
Fuel Pump Pressure Minimum	62.0 psi
Key ON Engine OFF (KOEO)	55-62

Brakes

Torque Caliper to Bracket	80 ft-lbs / 31 ft-lbs
Torque to Knuckle	129 ft-lbs / 221 ft-lbs
Minimum Pad Thickness	Front: 0.030; Rear: 0.030 specification
Rotor Max Parallel Variation	0.001 in
Rotor Runout Limit	0.005 in
Rotor Nominal Thickness From	1.142 in / 1.181 in / 1.496 in
Rotor Nominal Thickness To	1.142 in / 1.181 in / 1.496 in
Rotor Minimum Machining	1.102 in / 1.142 in / 1.457 in

Multi-step torque procedures OEM · verified

Cylinder Head — tightening sequence 4 stages

1	all bolts	22 ft. lbs
2	long bolts	75 degrees
3	medium bolts	65 degrees
4	55

Cylinder Head — tightening sequence 5 stages

1	M11 bolts	22 ft. lbs
2	M11 bolts-90 degrees	90 degrees
3	M11 bolts 1-8	90 degrees
4	M11 bolts 9 and 10	50 degrees
5	22

Cylinder Head — tightening sequence 5 stages

1	M11 bolts	22 ft. lbs
2	M11 bolts-90 degrees	90 degrees
3	M11 bolts 1-8	90 degrees
4	M11 bolts 9 and 10	50 degrees
5	22

Cylinder Head — tightening sequence 1 stages

all bolts

22 ft. lbs

Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages

22.0

Intake Manifold to Engine Bolts — tightening sequence 1 stages

7.4

Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages

18.0

Intake Manifold to Engine Bolts — tightening sequence 1 stages

7.4

Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages

18.0

Intake Manifold to Engine Bolts — tightening sequence 1 stages

7.4

Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages

22.0

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the 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	Differential (inspect fluid level) · Fuel Line (inspect) · Fuel Tank Filler Cap O-Ring (inspect)
Every 15,000 mi	Fuel Filter Water Separator (drain)
Every 25,000 mi	Exhaust System (Complete) (inspect) · Fuel System (inspect) · Wheel Bearing (repack)
Every 50,000 mi	Fuel Evaporative Emission Control System (inspect)
Every 60,000 mi	Fuel Filter (replace)
Every 100,000 mi	Spark Plug Wires (inspect) · Spark Plugs (replace) · Transmission Fluid & Filter (replace)
At 150,000 mi	Accessory Drive Belt (inspect) · Engine Coolant System (drain, flush & refill)