GMC Truck›Sierra 4WD›2012›Overview/gmc-truck/sierra-4wd/2012/base/

2012 GMC Truck Sierra 4WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2012 Sierra 4WD.

The 2012 GMC Truck Sierra 4WD takes 4.5 qt of 5W-30 engine oil.

Model year20132012

Quick specs

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

Engine oil capacity4.5 qtOEM · verified
Engine oil type5W-30OEM · 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 sizeLT265-60R20OEM · verified
Wheel / rim8.5 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter12690386 alt 12731175
Engine air filter22845992 alt 15908916
Fuel filter12646512
Spark plug12681664 alt 12680072
Battery88866271 alt 88866309
Front wiper blades25877402
Serpentine belt19210691 alt 12626222
Thermostat89018168 alt 12632948

Diagrams

Power distribution wiring7 sheets

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 engine oil, Synthetic · SAE 75W 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 Capacity11.5
Brake FluidDOT 3
Differential Gear OilSynthetic · SAE 75W · GL-5
Differential Gear Oil Capacity1.83 qt
Differential Gear OilSynthetic · SAE 75W
Differential Gear Oil Capacity3.17 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
Exhaust Manifold to Cylinder Head Bolts42 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 Hub173 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
Optional BCI Group Number48
Optional BCI Cranking Performance730 cca
Standard BCI Group Number48

Service checks

Pressure Test15 psi
Radiator Cap Pressure Relief15 psi
Thermostat Opening Temperature188-206 °F
Pressure Test15 psi
Radiator Cap Pressure Relief15 psi
Thermostat Opening Temperature188-206 °F
Pressure Test15 psi
Radiator Cap Pressure Relief15 psi

Brakes

Torque Caliper to Bracket77 ft-lbs / 38 ft-lbs
Torque to Knuckle221 ft-lbs / 148 ft-lbs
Torque Caliper to Bracket77 ft-lbs / 38 ft-lbs / 74 ft-lbs
Torque to Knuckle221 ft-lbs / 148 ft-lbs / 129 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
1Installation, 110 ft. lbs., step 2: 360 degrees., step 3: 59 ft. lbs., step 4: 125 degrees, install new bolt.110 ft. lbs
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
1installation, 110 ft. lbs., step 2: 360 degrees., step 3: 59 ft. lbs., step 4: 125 degrees., install new bolt.110 ft. lbs
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
174 ft. lbs., step 2: 100 degrees., step 3: 90 degrees., install new bolt.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:

122.0 ft. lbs.22 ft. lbs
290 degrees90 degrees
370 degrees; M8 Bolts:70 degrees
122.0 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
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
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: 1811 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the 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.

At 100 miWheel Lug Nut (torque)
At 2,000 miWheel Lug Nut (torque)
At 6,000 miWheel Lug Nut (torque)
Every 7,500 miAccelerator Pedal (inspect) · Body Latches, Locks & Hinges (lubricate) · Brake Shift Interlock Solenoid (inspect) · Brake System (inspect) · Diesel Emissions Fluid (fill) · Engine Air Filter Element (inspect)
Every 22,500 miFuel Filter (replace)
At 45,000 miTransmission Filter (replace)
Every 45,000 miFuel Evaporative Emission Control System (inspect)
Every 97,500 miSpark Plug Wires (inspect) · Spark Plugs (replace) · Transfer Case Assembly (drain & refill) · Transmission Fluid & Filter (replace)
At 150,000 miAccessory Drive Belt (inspect) · Engine Coolant System (drain, flush & refill) · Transmission Filter (replace)

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 12681664

Fuse box & wiring diagrams

Interactive fuse-box and wiring references for this vehicle, searchable by circuit.

Wiring diagrams

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 2012 Sierra 4WD take?

4.5 qt of 5W-30 MEETING GM DEXOS 1 SPECIFICATION, per the factory manual.