Engines |
Vortec
4200 4.2L I-6 |
Vortec
5300 5.3L V-8 |
Application |
standard |
optional |
Type |
4.2L inline 6 |
5.3L V-8 |
Displacement (cu in / cc) |
256 / 4160 |
325 / 5328 |
Bore & stroke (in / mm) |
3.66 x 4.01 / 93 x 102 |
3.78 x 3.27 / 96 x 92 |
Block material |
cast aluminum |
cast aluminum |
Cylinder head material |
cast aluminum |
cast aluminum |
Valvetrain |
2 valves/cylinder, overhead
cam, hydraulic roller lifting |
2 valves/cylinder, overhead
cam, hydraulic roller lifting |
Ignition system |
coil-on-plug, dual platinum
electrodes |
composite distributor,
platinum-tipped spark plugs, low-resistance spark
plug wires |
Fuel delivery |
sequential fuel injection,
electronic throttle control |
sequential fuel injection |
Compression ratio |
10.1:1 |
9.5:1 |
Horsepower (hp / kw @ rpm) |
275 / 205 @ 6000
preliminary |
290 / 216 @ 5200 |
Torque (lb.-ft. / Nm @ rpm) |
275 / 373 @ 3600
preliminary |
325 / 441 @ 4000 |
Recommended fuel |
unleaded regular |
unleaded regular |
Maximum engine speed (rpm) |
6300 |
5900 |
Emissions controls |
3-way catalytic converter,
positive crankcase ventilation, evaporative collection
system |
3-way catalytic converter,
exhaust gas recirculation, positive crankcase ventilation,
evaporative collection system |
Estimated fuel economy (mpg
city / hwy / comb.) |
16 / 21 (2WD) |
15 / 19 (2WD) |
15 /
21 (AWD) |
14 /
18 (AWD) |