GMC gasoline V6 90° Generation I 4.3L (262 CID) Vortec 4300 V6 LU3 (2004–2014)
GMC gasoline V6 90° Generation I 4.3L (262 CID) Vortec 4300 V6 LU3 (2004–2014) is an 262 in³ (4.29 L) internal combustion reciprocating V6 engine. It has bore/stroke ratio of 4.012 in × 3.48 in (10.19 cm × 8.84 cm), and uses 9.2:1 compression. This engine was rated 195 hp (145.41 kW) at 4600 rpm and 260 lbf⋅ft (352.51 N⋅m) of torque at 2800 rpm. It was used in Chevrolet and GMC cars.
| Parameter | Output |
|---|---|
| Power Rating | 195 hp (145.41 kW) at 4600 RPM |
| Torque Rating | 260 lbf⋅ft at 2800 RPM |
| Parameter | Value |
|---|---|
| Type | Internal Combustion Reciprocating |
| Fuel Type | Gasoline or Natural Gas (CNG) |
| Cylinder Configuration | V6 |
| Engine Displacement | 262 in³ |
| Bore | 4.012 in |
| Stroke | 3.48 in |
| Compression Ratio | 9.2:1 |
| Firing Order | 1-6-5-4-3-2 |
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| Parameter | Value |
|---|---|
| Block Material | Cast iron |
| Crankshaft Material | Cast nodular iron |
| Piston Material | Cast alloy aluminum |
| Connecting Rod Material | Forged steel |
| Parameter | Value |
|---|---|
| Spark Plugs | R41-932 |
| Spark Plug Gap | 0.06 in |
| Wires Resistance (nominal) | 1000 ohms per foot |
| Parameter | Value |
|---|---|
| Head Material | Cast iron |
| Valvetrain Type | OHV |
| Valves per Cylinder | 2 |
| Camshaft Material | Steel |
| Parameter | Value |
|---|---|
| Air Intake Method | Naturally Aspirated |
| Parameter | Value |
|---|---|
| Injection Type | Multi Point |
| Parameter | Value |
|---|---|
| Oil Pump Pressure | 24 Psi at 4000 RPM |
| Parameter | Value |
|---|---|
| Water Pump | Centrifugal vane impeller type pump |
| Condition | Value |
|---|
expand_moreGeneral specifications
expand_moreBalance shaft
expand_moreBearing journal diameter
| Rear | 1.499–1.5 in |
expand_moreBushing bore diameter
| Rear | 0.002–0.0035 in |
expand_moreBlock
| Crankshaft main bearing bore out-of-round | 0.002 in |
| Cylinder bore diameter | 4.001–4.002 in |
expand_moreCylinder bore out-of-round
| Production | 0.00067 in |
| Service | 0.002 in |
expand_moreCylinder bore taper
expand_moreProduction
| Relief Side | 0.00098 in |
| Thrust side | 0.00047 in |
| Service | 0.00098 in |
| Cylinder head deck surface flatness | 0.002–0.006 in |
expand_moreCamshaft
| Camshaft end play | 0.001–0.009 in |
| Camshaft journal ⌀ | 1.87–1.87 in |
| Camshaft journal out-of-round | 0.00098 in |
expand_moreCamshaft lobe lift
| Exhaust | 0.28–0.29 in |
| Intake | 0.27–0.28 in |
| Camshaft runout | 0.0026 in |
expand_moreConnecting rod
expand_moreConnecting rod bearing clearance
| Production | 0.0015–0.0031 in |
| Service | 0.00098–0.0025 in |
| Connecting rod side clearance | 0.0059–0.017 in |
expand_moreCrankshaft
| Connecting rod journal diameter | 2.249–2.25 in |
expand_moreConnecting rod journal out-of-round
| Production | 0.00031 in |
| Service | 0.00098 in |
expand_moreConnecting rod journal taper
| Production | 0.00039 in |
| Service | 0.00098 in |
| Crankshaft end play | 0.002–0.0079 in |
expand_moreCrankshaft main bearing clearance 1
| Production | 0.00079–0.002 in |
| Service | 0.001–0.002 in |
expand_moreCrankshaft main bearing clearance 2, 3, and 4
| Production | 0.0011–0.0023 in |
| Service | 0.00098–0.0025 in |
| Crankshaft main journal diameter 1 | 2.449–2.449 in |
| Crankshaft main journal diameter 2 and 3 | 2.448–2.449 in |
| Crankshaft main journal diameter 4 | 2.448–2.449 in |
expand_moreCrankshaft main journal out-of-round
| Production | 0.0002 in |
| Service | 0.00098 in |
| Crankshaft main journal taper | 0.00028 in |
expand_moreExhaust manifold
expand_moreSurface flatness
| Flange to flange | 0.0098 in |
| Individual flange | 0.002 in |
expand_moreIntake manifold
| Surface flatness | 0.0039 in |
expand_morePiston rings
expand_morePiston ring end gap
expand_moreFirst compression ring
| Production | 0.0098–0.016 in |
| Service | 0.0098–0.02 in |
expand_moreSecond compression ring
| Production | 0.015–0.023 in |
| Service | 0.015–0.031 in |
expand_moreOil control ring
| Production | 0.0098–0.03 in |
| Service | 0.0002–0.0035 in |
expand_morePiston ring to groove clearance
expand_moreFirst compression ring
| Production | 0.0012–0.0028 in |
| Service | 0.0012–0.0033 in |
expand_moreSecond compression ring
| Production | 0.003–0.011 in |
| Service | 0.0012–0.0033 in |
expand_moreOil control ring
| Production | 0.0018–0.0077 in |
| Service | 0.003–0.0079 in |
expand_moreMetric english
expand_morePistons and pins
expand_morePiston
expand_morePiston to bore clearance
| Production | 0.00071–0.0024 in |
| Service | 0.003 in |
expand_morePin
expand_morePiston pin clearance to connecting rod bore
| Press Fit | 0.00047–0.0019 in |
expand_morePiston pin clearance to piston pin bore
| Production | 0.00051–0.00091 in |
| Service | 0.00098 in |
| Piston pin diameter | 0.927–0.927 in |
expand_moreValve system
expand_moreValves
| Valve face angle | 45° |
| Valve seat angle | 46° |
| Valve seat run-out | 0.002 in |
expand_moreValve seat width
| Intake | 0.04–0.065 in |
| Exhaust | 0.065–0.098 in |
| Valve stem oil seal installed height | 0.039–0.079 in |
expand_moreValve stem-to-guide clearance
expand_moreIntake
| Production | 0.00098–0.0027 in |
| Service | 0.00098–0.0037 in |
expand_moreExhaust
| Production | 0.00098–0.0027 in |
| Service | 0.00098–0.0037 in |
expand_moreRocker arms
| Valve rocker arm ratio | 1.5:1 |
expand_moreValve springs
| Valve spring free length | 2.02 in |
expand_moreValve spring installed height
| Intake | 1.69–1.71 in |
| Exhaust | 1.69–1.71 in |
expand_moreValve spring load
| Closed | 1.11–1.23 ft |
| Open | 2.73–2.96 ft |
expand_moreElectric engine
expand_moreBattery
expand_moreBase
| Cold Cranking Amperage (CCA) | 600 A |
| Reserve capacity rating | 115 Minutes |
| Replacement Battery Number | 78-6YR |
expand_moreDual (optional)
| Reserve capacity rating | 115 Minutes |
| Replacement Battery Number | 78-7YR |
| Cold Cranking Amperage (CCA) | 770 A |
expand_moreParallel hybrid truck HP2
| GM part number | 88986971 |
| Replacement Battery Number | Panasonic HV1255 |
| Starter motor | PG-260G |
expand_moreGenerator
expand_moreBase
| Generator model | Delphi AD230 |
| Rated Output | 102 A |
| Load test output | 71 A |
expand_moreDual (optional)
| Generator model | Delphi AD244 |
| Rated Output | 130 A |
| Load test output | 91 A |
expand_moreBosch Generator
| Generator model | Bosch 15755900 |
| Rated Output | 130 A |
| Load test output | 91 A |
| Condition | Value |
|---|
expand_moreGeneral specifications
| Accelerator cable bracket nuts for stud screws | 8.85 lbf⋅ft |
| Accelerator cable bracket nut on throttle body | 6.64 lbf⋅ft |
| Accelerator cable bracket stud bolts on intake manifold | 4.43 lbf⋅ft |
| Accelerator cable bracket stud bolts on throttle body | 8.85 lbf⋅ft |
| Air cleaner bracket stud screws | 5.9 lbf⋅ft |
expand_moreBalance shaft driven gear screws
| First stage | 14.75 lbf⋅ft |
| Final stage | 35° |
| Balance shaft retainer screws | 8.85 lbf⋅ft |
| Battery wiring harness bracket bolt on the oil pan | 8.85 lbf⋅ft |
| Battery negative wiring harness bolt on the engine block | 18.44 lbf⋅ft |
| Battery positive wiring harness junction block bracket screws | 18.44 lbf⋅ft |
| Belt idler pulley screws | 36.88 lbf⋅ft |
| Camshaft retainer screws | 8.85 lbf⋅ft |
expand_moreMetric english
| Camshaft sprocket screws | 18.44 lbf⋅ft |
expand_moreConnecting rod nuts
| First stage | 19.91 lbf⋅ft |
| Final stage | 70° |
| Crankshaft balancer screws | 70.07 lbf⋅ft |
expand_moreCrankshaft bearing cap screws
expand_morePreferred method
| First stage | 14.75 lbf⋅ft |
| Final stage | 73° |
| Crankshaft position sensor (CKP) screws | 6.64 lbf⋅ft |
| Crankshaft pulley screws | 42.78 lbf⋅ft |
| Crankshaft rear oil seal housing bolt and nuts | 8.85 lbf⋅ft |
| Crankshaft rear oil seal housing retainer stud screws | 4.43 lbf⋅ft |
| Crossmember screws | 73.76 lbf⋅ft |
expand_moreCylinder head screws
expand_morePreferred method
| First pass (all screws) | 22.13 lbf⋅ft |
| Long bolts final pass in sequence | 75° |
| Medium bolts final pass (in sequence) | 65° |
| Short Bolts Final Pass in Sequence | 55° |
| Cylinder head core hole plug | 14.75 lbf⋅ft |
| Distributor cap screws | 1.77 lbf⋅ft |
| Distributor clamp screws | 18.44 lbf⋅ft |
| Drive belt idler screws | 36.88 lbf⋅ft |
| Drive belt tensioner screws | 36.88 lbf⋅ft |
| Engine block left oil gallery plug | 14.75 lbf⋅ft |
| Engine block rear left oil gallery plug | 22.13 lbf⋅ft |
| Engine block rear right oil gallery plug | 14.75 lbf⋅ft |
| Engine block coolant drain plug | 14.75 lbf⋅ft |
| Engine block oil gallery plugs | 14.75 lbf⋅ft |
| Engine coolant heater screws | 1.48 lbf⋅ft |
| Engine coolant temperature sensor (ECT) | 14.75 lbf⋅ft |
| Engine flywheel screws | 73.76 lbf⋅ft |
| Engine front cover screws | 8.85 lbf⋅ft |
| Engine lift front bracket stud screws | 25.81 lbf⋅ft |
| Engine mount bracket screws | 36.88 lbf⋅ft |
| Engine mount bracket screws to the engine block | 36.88 lbf⋅ft |
| Engine mount bracket through-screws | 55.32 lbf⋅ft |
| Engine mount frame lateral screws | 47.94 lbf⋅ft |
| Engine oil level sensor | 9.59 lbf⋅ft |
| Engine oil pressure gage sensor | 22.13 lbf⋅ft |
| Engine oil pressure gage sensor fitting | 11.06 lbf⋅ft |
| Engine shield screws | 14.75 lbf⋅ft |
| Junction block bracket screws | 6.64 lbf⋅ft |
| Engine wiring harness bracket bolt on the generator and the tensioner bracket | 18.44 lbf⋅ft |
| Engine wiring harness bracket nut on the evaporator canister purge solenoid valve | 6.64 lbf⋅ft |
| Engine wiring harness bracket nut on the intake manifold | 8.85 lbf⋅ft |
| Engine wiring harness bracket stud screws | 18.44 lbf⋅ft |
| Engine wiring harness screws | 6.64 lbf⋅ft |
expand_moreEngine cooling
| Auxiliary water pump bracket nuts | 6.64 lbf⋅ft |
| Coolant heater screws | 1.48 lbf⋅ft |
| Coolant heater cord screws | 5.9 lbf⋅ft |
| Engine block coolant drain plug | 44.25 lbf⋅ft |
| Engine shield screws | 14.75 lbf⋅ft |
| Fan clutch screws | 16.96 lbf⋅ft |
| Fan clutch nuts | 41.3 lbf⋅ft |
| Fan shroud screws | 6.64 lbf⋅ft |
| Hood hinge screws | 18.44 lbf⋅ft |
| Radiator screws | 18.44 lbf⋅ft |
| Starter and generator control module (SGCM) brace screws | 18.44 lbf⋅ft |
| Starter and generator control module (SGCM) coolant pump screws | 6.64 lbf⋅ft |
| Starter and generator control module (SGCM) coolant tank screws | 14.75 lbf⋅ft |
| Starter and generator control module (SGCM) coolant tank nuts | 6.64 lbf⋅ft |
| Starter and generator control module (SGCM) cooling fan screws | 6.64 lbf⋅ft |
| Starter and generator control module (SGCM) radiator screws | 6.64 lbf⋅ft |
| Starter and generator stator coolant inlet pipe screws | 6.64 lbf⋅ft |
| Surge tank screws and nuts | 6.64 lbf⋅ft |
| Thermal bypass fitting | 25.81 lbf⋅ft |
| Thermal bypass hose screws | 7.38 lbf⋅ft |
| Transmission control module (TCM) cover screws | 6.64 lbf⋅ft |
| Transmission control module (TCM) electrical connector screws | 5.9 lbf⋅ft |
| Water pump screws | 33.19 lbf⋅ft |
| Water pump pulley screws | 18.44 lbf⋅ft |
expand_moreElectric engine
| 3-Phase wiring harness bracket cover screws | 6.64 lbf⋅ft |
| 3-phase wiring harness bracket nuts | 6.64 lbf⋅ft |
| 3-phase wiring harness cover nuts | 6.64 lbf⋅ft |
| Starter and generator control module 3-phase wiring harness nuts | 11.06 lbf⋅ft |
| Stator 3-phase wiring harness nuts | 10.33 lbf⋅ft |
| Air cleaner outlet ducts bracket | 2.95 lbf⋅ft |
| ACC power receptacle ground harness screws | 6.64 lbf⋅ft |
| Auxiliary battery wiring harness bracket screws | 7.38 lbf⋅ft |
| Auxiliary battery positive wiring harness nuts | 6.64 lbf⋅ft |
| Auxiliary battery relay nuts | 6.64 lbf⋅ft |
| Auxiliary battery tray screws | 6.64 lbf⋅ft |
| Auxiliary battery tray nuts | 18.44 lbf⋅ft |
| Auxiliary negative battery wiring harness screws | 12.54 lbf⋅ft |
| Auxiliary positive battery wiring harness screws | 12.54 lbf⋅ft |
| Auxiliary positive battery wiring harness nuts | 5.9 lbf⋅ft |
| Auxiliary positive wiring harness to relay nuts | 6.64 lbf⋅ft |
| Battery wiring harness bracket screws | 18.44 lbf⋅ft |
| Battery hold down retainer screws | 18.44 lbf⋅ft |
| Battery tray screws | 6.64 lbf⋅ft |
| Crossbar screws | 73.76 lbf⋅ft |
| Energy storage box (ESB) air duct hose to ESB screws | 4.43 lbf⋅in |
| Energy storage box (ESB) air duct hose to Fan screws | 8.85 lbf⋅in |
| Energy storage box (ESB) battery 1 to battery 2 power wiring harness nuts | 7.38 lbf⋅ft |
| Energy storage box (ESB) battery 2 to battery 3 power wiring harness nuts | 7.38 lbf⋅ft |
| Energy storage box (ESB) battery cut off switch nuts | 7.38 lbf⋅ft |
| Energy storage box (ESB) battery bracket nuts | 7.38 lbf⋅ft |
| Energy storage box (ESB) bracket nuts | 34.67 lbf⋅ft |
| Energy storage box (ESB) fan screws | 8.85 lbf⋅in |
| Energy storage box (ESB) fuse bracket screws | 1.48 lbf⋅ft |
| Energy storage box (ESB) fuse power wiring harness to high current sensor nuts | 7.38 lbf⋅ft |
| Energy storage box (ESB) ground wire screws | 4.43 lbf⋅ft |
| Energy storage box (ESB) ground strap nuts | 7.38 lbf⋅ft |
| Energy storage box (ESB) high current connector screws | 4.43 lbf⋅ft |
| Energy storage box (ESB) high current connector to battery 3 nuts | 7.38 lbf⋅ft |
| Energy storage box (ESB) high current sensor nuts | 4.43 lbf⋅ft |
| Energy storage box (ESB) intermediate cover screws | 4.43 lbf⋅ft |
| Energy storage box (ESB) maxi-fuse nuts | 7.38 lbf⋅ft |
| Energy storage box (ESB) receptacle outlet cover screws | 4.43 lbf⋅in |
| Energy storage box (ESB) receptacle outlet screws | 1.48 lbf⋅ft |
| Energy storage box (ESB) service disconnect switch screws and nuts | 4.43 lbf⋅ft |
| Energy storage box (ESB) service disconnect switch power wiring harness to high current connector nuts | 7.38 lbf⋅ft |
| Energy storage box (ESB) service disconnect switch power wiring harness to service disconnect switch nuts | 7.38 lbf⋅ft |
| Energy storage box (ESB) temperature sensor screws | 4.43 lbf⋅in |
| Energy storage control module nuts | 4.43 lbf⋅ft |
| Engine ground harness screws | 11.8 lbf⋅ft |
| Engine wiring ground harness screws | 11.8 lbf⋅ft |
| Fender to cowl support brace screws | 6.64 lbf⋅ft |
| Flexplate screws | 73.76 lbf⋅ft |
| Forward lamp wiring ground harness screws | 6.64 lbf⋅ft |
| Front end diagonal brace screws | 6.64 lbf⋅ft |
| Generator screws | 36.88 lbf⋅ft |
| Generator bracket | 30.24 lbf⋅ft |
| Generator wiring harness nuts | 6.64 lbf⋅ft |
| Ground strap nut (energy storage box) | 7.38 lbf⋅ft |
| Harness clip to junction block bracket screws | 6.64 lbf⋅ft |
| Heater hose bracket screws | 18.44 lbf⋅ft |
| Hybrid Control Module bracket screws | 6.64 lbf⋅ft |
| J-46093 screws | 36.88 lbf⋅ft |
| Negative Battery wiring harness screws | 12.54 lbf⋅ft |
| Positive battery wiring harness screws | 12.54 lbf⋅ft |
| Positive wiring harness at underhood bussed electrical center (UBEC) screws | 6.64 lbf⋅ft |
| Positive/Negative battery wiring harness bolt 14V | 6.64 lbf⋅ft |
| Positive/Negative battery wiring harness channel rear nut 42V | 7.38 lbf⋅ft |
| Positive/Negative battery wiring harness grommet nut 42V | 7.38 lbf⋅ft |
| Positive/Negative battery wiring ground harness strap bolts 42V | 7.38 lbf⋅ft |
| Starter screws | 31.72 lbf⋅ft |
| Starter and generator control module (SGCM) screws | 14.75 lbf⋅ft |
| Starter and generator control module (SGCM) brace screws | 18.44 lbf⋅ft |
| Starter and generator control module (SGCM) bracket screws | 6.64 lbf⋅ft |
| Starter and generator control module (SGCM) bracket nuts | 18.44 lbf⋅ft |
| Starter and generator control module (SGCM) coolant tank screws | 6.64 lbf⋅ft |
| Starter and generator control module (SGCM) cover screws | 6.64 lbf⋅ft |
| Starter and generator stator stud screws | 11.8 lbf⋅ft |
| Starter lead nuts | 6.64 lbf⋅ft |
| Starter solenoid nuts | 2.51 lbf⋅ft |
| Transmission fill tube nuts | 13.28 lbf⋅ft |
| Transmission heat shield | 12.54 lbf⋅ft |
| Transmission mount nuts | 29.5 lbf⋅ft |
| Transmission support screws and nuts | 51.63 lbf⋅ft |
| Wiring harness bracket screws | 18.44 lbf⋅ft |
expand_moreEngine controls
| Accelerator cable bracket stud bolts and nuts | 8.85 lbf⋅ft |
| Accelerator cable bracket nuts | 7.38 lbf⋅ft |
| Air cleaner outlet ducts bracket | 2.95 lbf⋅ft |
| Air cleaner outlet resonator stud screws | 7.38 lbf⋅ft |
| Camshaft position (CMP) sensor screws | 1.62 lbf⋅ft |
| Crankshaft position sensor (CKP) screws | 6.64 lbf⋅ft |
| Distributor hold down screws | 18.44 lbf⋅ft |
| Distributor cap screws | 1.77 lbf⋅ft |
| Engine coolant temperature sensor (ECT) | 14.75 lbf⋅ft |
| Engine shield screws | 14.75 lbf⋅ft |
| EVAP canister bracket screws | 18.44 lbf⋅ft |
| EVAP canister purge valve nuts | 8.85 lbf⋅ft |
| EVAP canister ventilation valve bracket screws | 8.85 lbf⋅ft |
| Fuel lines bracket screws | 4.43 lbf⋅ft |
| Fuel lines bracket on the transmission | 18.44 lbf⋅ft |
| Fuel lines fittings | 20.65 lbf⋅ft |
| Fuel lines nuts | 2.21 lbf⋅ft |
| Fuel injector bracket lock nuts | 2.21 lbf⋅ft |
| Fuel tank ground strap screws | 6.64 lbf⋅ft |
| Fuel tank filler housing to body screws | 1.7 lbf⋅ft |
| Fuel tank filler housing to fuel tank screws | 1.7 lbf⋅ft |
| Fuel tank filler hose clamp | 1.84 lbf⋅ft |
| Fuel line fittings | 18.44 lbf⋅ft |
| Fuel tank shield screws | 13.28 lbf⋅ft |
| Fuel tank strap screws | 29.5 lbf⋅ft |
| Heated oxygen sensor | 30.98 lbf⋅ft |
| Idle air control valve screws | 2.21 lbf⋅ft |
| Ignition coil bracket stud screws | 8.11 lbf⋅ft |
| Ignition module screws | 2.58 lbf⋅ft |
| Knock sensor screws | 18.44 lbf⋅ft |
| Mass air flow (MAF) hose clamp | 2.95 lbf⋅ft |
| Powertrain control module (PCM) electrical connector | 5.9 lbf⋅ft |
| Rotor screws | 1.48 lbf⋅ft |
expand_moreSpark Plug
| New aluminium head | 14.75 lbf⋅ft |
| New iron head | 22.13 lbf⋅ft |
| Used head | 11.06 lbf⋅ft |
| Throttle body stud screws | 6.64 lbf⋅ft |
| Throttle position sensor (TPS) screws | 1.48 lbf⋅ft |
expand_moreExhaust system
| Exhaust bracket screws | 8.85 lbf⋅ft |
| Exhaust heat shield bolt (body panel) | 6.64 lbf⋅ft |
| Exhaust heat shield nut (body panel) | 6.64 lbf⋅ft |
| Exhaust manifold stud screws | 22.13 lbf⋅ft |
| Exhaust manifold heat shields | 6.64 lbf⋅ft |
| Exhaust manifold pipe nuts | 36.88 lbf⋅ft |
| Exhaust muffler hanger nuts | 36.88 lbf⋅ft |
| Exhaust muffler nuts | 29.5 lbf⋅ft |
| Exhaust pipe clamp | 32.45 lbf⋅ft |
| Exhaust pipe bracket bolt 4L60-E | 12.54 lbf⋅ft |
| Hood hinge screws | 18.44 lbf⋅ft |
| Outlet duct clamp | 4.43 lbf⋅ft |
| Oxygen Sensor | 30.98 lbf⋅ft |
| Rear shock absorber lower screws | 70.07 lbf⋅ft |
| Spark plug wire retainer screws | 8.85 lbf⋅ft |
| Transmission screws | 73.76 lbf⋅ft |
| Transmission mount to support nuts | 29.5 lbf⋅ft |
| Transmission support crossmember screws | 70.07 lbf⋅ft |