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2008 GMC Truck Sierra 4WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2008 Sierra 4WD.

The 2008 GMC Truck Sierra 4WD takes 4.5 qt of 5W-30 engine oil.

Model year201120092008

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 48 · 615 CCA battery, OE oil filter 12690386. 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 48 · 615 CCAOEM · verified
Tire sizeSILVERADO, SIERRA 2500 LT245-75R16E; LT265-75R17EOEM · verified
Wheel / rim6.5, 7.5 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter12690386 alt 12731175
Engine air filter22845992 alt 15908916
Fuel filter12646512
Spark plug12621258 alt 12681665
Front wiper blades25877402
Serpentine belt12576447 alt 12637203
Thermostat89018168 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, SAE 75W · Synthetic in the differential, DOT 3 brake fluid. Torque lug nuts to 140 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 FluidATF
Automatic Transmission Fluid Capacity6
Brake FluidDOT 3
Differential Gear OilSAE 75W · Synthetic
Differential Gear Oil Capacity1.83 qt
Differential Gear OilSAE 75W · Synthetic
Differential Gear Oil Capacity2.75 qt
Engine CoolantDEX-COOL OR EQUIVALENT

Engine torques

Cylinder Head StepsApply sealant GM P/N 12346004
Cylinder Head StepsInstall the NEW cylinder head bolts.
Intake Manifold to Engine BoltsLower: 2nd
Intake Manifold to Engine Bolts18 ft-lbs
Exhaust Manifold to Cylinder Head Bolts42 ft-lbs
Intake Manifold to Engine Bolts7.4 ft-lbs
Exhaust Manifold to Cylinder Head Bolts18.0 ft-lbs
Intake Manifold to Engine Bolts7.4 ft-lbs

Chassis torques

Leaf Spring to Axle (U-bolts)74.0 plus 90 degrees ft-lbs
Leaf Spring to Chassis Bracket162.0 ft-lbs
Leaf Spring to Rear Shackle129.0 ft-lbs
Leaf Spring Rear Shackle to Chassis Bracket85.0 ft-lbs
Lug Nuts140 ft-lbs
Front Wheel Hub177 ft-lbs

Ignition

Cylinder Firing Order1-8-7-2-6-5-4-3
Cylinder Firing Order1-6-5-4-3-2
Cylinder Firing Order1-8-7-2-6-5-4-3
Spark Plug ManufacturerAC Delco
Spark Plug Gap0.060 in
Spark Plug Torque11 ft-lbs
Spark Plug ManufacturerAC Delco
Spark Plug Gap0.040 in

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.40-1.62 lbs
Oil GroupPAG
Oil Type46
Oil Capacity6.00-7.10 oz
Standard BCI Group Number48
Standard BCI Cranking Performance615 cca
Standard BCI Group Number48

Service checks

Pressure Test20 psi
Radiator Cap Pressure Relief15 psi
Thermostat Opening Temperature188-206 °F
Key ON Engine OFF (KOEO)50-60 New body style
Key ON Engine OFF (KOEO)50-60
RPM43-45 @ Idle rpm
Key ON Engine OFF (KOEO)50-60
RPM43-45 @ Idle rpm

Brakes

Torque Caliper to Bracket28 ft-lbs / 74 ft-lbs / 80 ft-lbs
Torque to Knuckle148 ft-lbs / 129 ft-lbs / 221 ft-lbs
Torque Caliper to Bracket28 ft-lbs / 80 ft-lbs
Torque to Knuckle148 ft-lbs / 221 ft-lbs
Brake ApplicationWITH RPO J92, JD9, JF3, JF7
Torque Caliper to Bracket74 ft-lbs
Torque to Knuckle129 ft-lbs
Minimum Pad ThicknessFront: 0.030; Rear: 0.030 specification

Multi-step torque procedures OEM · verified

Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
170 ft. lbs., step 2: 95 ft. lbs.70 ft. lbs
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
1Installation, 92 ft. lbs., step 2: then remove bolt, install new bolt., step 3: 92 ft. lbs., step 4: 130 degrees.92 ft. lbs
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
174 ft. lbs., step 2: 100 ft. lbs., step 3: 105 degrees.74 ft. lbs
Cylinder Head — tightening sequence 3 stages

Prep Do not reuse old bolts. Do not allow oil on cylinder head or head bolt bosses · M11 Bolts 1-10:

122.0 ft. lbs.22 ft. lbs
290 degrees90 degrees
370 degrees; M8 Bolts 11-15:70 degrees
122.0 ft. lbs.22 ft. lbs
222.0 ft. lbs.22 ft. lbs
Cylinder Head — tightening sequence 3 stages

Prep Do not reuse old bolts. Do not allow oil on cylinder head or head bolt bosses · M11 Bolts 1-10:

122.0 ft. lbs.22 ft. lbs
290 degrees90 degrees
370 degrees; M8 Bolts 11-15:70 degrees
122.0 ft. lbs.22 ft. lbs
222.0 ft. lbs.22 ft. lbs
Cylinder Head — tightening sequence 3 stages

Prep Do not reuse old bolts. Do not allow oil on cylinder head or head bolt bosses · M11 Bolts 1-10:

122.0 ft. lbs.22 ft. lbs
290 degrees90 degrees
370 degrees; M8 Bolts 11-15:70 degrees
122.0 ft. lbs.22 ft. lbs
222.0 ft. lbs.22 ft. lbs
Intake Manifold to Engine Bolts — tightening sequence 1 stages
13.7 ft. lbs., step 2: 7.43.7 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
111 ft. lbs., step 2: 1811 ft. lbs
Intake Manifold to Engine Bolts — tightening sequence 1 stages
13.7 ft. lbs., step 2: 7.43.7 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
111 ft. lbs., step 2: 1511 ft. lbs
Intake Manifold to Engine Bolts — tightening sequence 1 stages
13.7 ft. lbs., step 2: 7.43.7 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
111 ft. lbs., step 2: 1511 ft. lbs
Intake Manifold to Engine Bolts — tightening sequence 1 stages
13.7 ft. lbs., step 2: 7.43.7 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
111 ft. lbs., step 2: 1511 ft. lbs
Intake Manifold to Engine Bolts — tightening sequence 1 stages
13.7 ft. lbs., Step 2: 7.43.7 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
111 ft. lbs., Step 2: 1511 ft. lbs
Intake Manifold to Engine Bolts — tightening sequence 1 stages
13.7 ft. lbs., Step 2: 7.43.7 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
111 ft. lbs., Step 2: 1511 ft. lbs
Intake Manifold to Engine Bolts — tightening sequence 1 stages
13.7 ft. lbs., Step 2: 7.43.7 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
111 ft. lbs., Step 2: 1511 ft. lbs
Intake Manifold to Engine Bolts — tightening sequence 1 stages
13.7 ft. lbs., Step 2: 7.43.7 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
111 ft. lbs., Step 2: 1511 ft. lbs

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 15,000 miFuel Filter (replace)
Every 25,000 miExhaust System (Complete) (inspect) · Fuel System (inspect)
Every 50,000 miEngine Air Filter Element (replace) · Fuel Evaporative Emission Control System (inspect) · Transfer Case Assembly (drain & refill) · Transmission Fluid & Filter (replace)
Every 100,000 miSpark Plug Wires (inspect) · Spark Plugs (replace)
At 150,000 miAccessory Drive Belt (inspect) · Engine Coolant System (drain, flush & refill)

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific Sierra 4WD. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Group 48 batteryVehicles taking 4.5 qtEngine oil filter 12690386Engine air filter 22845992Fuel filter 12646512Spark plug 12621258

Reference guides

Cross-vehicle references for the kinds of data on this page.

OBD-II trouble codesTorque specificationsMaintenance schedulesFluid capacities & specs

Frequently asked

How much oil does the 2008 Sierra 4WD take?

4.5 qt of 5W-30 API, per the factory manual.