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2003 GMC Truck Savana 2WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2003 Savana 2WD.

The 2003 GMC Savana 2WD is a full‑size cargo truck built on the traditional Savana platform and powered by an engine that requires 4.5 qt of 5W‑30 API oil, a specification that underscores its straightforward, service‑friendly design. Across its model line, owner feedback totals 36 complaints, with the fuel‑system (gasoline) area emerging as the most frequent issue and 11 recalls recorded, indicating that while the vehicle’s mechanical fundamentals are solid, its fuel delivery components have historically attracted the most attention. Compared with the earlier 1994‑1997 generation—where complaints ranged from a single report in 1994 to a peak of 51 in 1997—the 2003 Savana sits in a relatively moderate reliability bracket, suggesting incremental improvements but still a need for diligent maintenance of its fuel system.

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 Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known.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 12731175
Engine air filter	22909882
Fuel filter	25171792 discontinued
Spark plug	12621258 alt 12681665
Front wiper blades	15214346
Serpentine belt	12576447 alt 12637204
Thermostat	12632948 alt 12561155

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

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 Oil	5W-30 · API
Engine Oil Capacity	4.5 qt

Engine torques

Crankshaft Pulley and/or Damper Bolts	70 ft-lbs
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	11-14 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 / 122 ft-lbs
Minimum Pad Thickness	Front: 0.030; Rear: 0.030 specification
Rotor Max Parallel Variation	0.001 in
Rotor Runout Limit	0.002 in
Rotor Minimum Machining	1.102 in
Rotor Discard at or Under	1.083 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	Axle Shaft Oil Seal (inspect) · CV Joint Boot (inspect) · Differential (inspect fluid level) · Tire & Wheel Assembly (rotate)
Every 15,000 mi	Underbody Splash Shield (inspect)
Every 30,000 mi	Fuel Filter (replace) · Wheel Bearing (repack)
Every 50,000 mi	Transmission Fluid & Filter (replace)
Every 60,000 mi	Fuel Evaporative Emission Control System (inspect)
Every 100,000 mi	Spark Plug Wires (inspect) · Spark Plugs (replace)
At 150,000 mi	Accessory Drive Belt (inspect) · Engine Coolant System (drain, flush & refill)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

Owner complaints about the 2003 GMC Truck Savana 2WD top in one area — the fuel system, gasoline, 4 of 36 reports (11%), well ahead of the next concern. That matters, because the fuel system, gasoline are also the target of recall 12V-388 on this vehicle — so the single most useful check before buying or servicing one is confirming it was actually performed. 4 of the reports describe a crash and 3 a fire — a small share of the total, but worth weighing against the fuel system, gasoline pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.

Open recalls

NHTSA campaigns

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

4 involved a crash · 3 a fire

Owner complaints by model year NHTSA · this generation & adjacent

’94 ’95 ’96 ’97

Owner complaints filed with NHTSA, by component

All 36 complaints on record, top 8 components.

Fuel System, Gasoline4

Service Brakes, Hydraulic4

Engine & Engine Cooling4

Fuel/Propulsion System3

Structure3

Seats3

Air Bags2

Electrical System2

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 11 campaigns on record for this vehicle.

12V388000Fuel System, Gasoline:Storage:Tank Assembly:Filler Pipe And CapReported 08/08/2012

General Motors (GM) is recalling certain model year 2003-2004 Chevrolet Express and GMC Savana vehicles, equipped with a left side cargo door, and originally sold or currently registered in Connecticut, Delaware… Remedy: GM will notify owners, and dealers will install a new fuel filler neck, free of charge. The safety recall began on October 1, 2012. Owners may contact the Chevrolet owner center…

05V558000Seat BeltsReported 19/12/2005

ON CERTAIN FULL-SIZE PASSENGER, CARGO, OR CUTAWAY VANS, THE FRONT AND REAR SEAT BELT BUCKLES WILL NOT LATCH OR WILL NOT UNLATCH. Remedy: DEALERS WILL INSPECT THE BUCKLES AND, IF FOUND TO BE INOPERATIVE, THE ENTIRE BUCKLE ASSEMBLY WOULD BE REPLACED. FOR BUCKLES FOUND TO BE OPERATIVE, DEALER WILL REPLACE ONLY THE…