2003 Chevrolet Silverado 1500 "front crank seal replacement 03" Questions

crank shaft positions. go here for expert help on Villager & Quest http://groups.yahoo.com/group/villagerquest/ Item Part Number Description 1 ? 40 Timing Chain/Belt Teeth 2 6256 Camshaft Sprocket

...front HEGO, from a leaky waterpump or hose or fittings. While you're there, check for a baggy timing chain. Base engine concerns can lead to numerous repeating engine mgmt. codes on these, with this ...

...Crank Position Sensor? Does this sound posible? I'm sure it will be tough to test as by the time he can look at it, it will probably start again...and I do not have much knowledge or meters...I just ...