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low69chevy · 06-28-2012, 04:47 PM

I kno on 99-06 gen III engines they have dished pistons like the 04-06 moreless most of them have the 706 heads and the older ones have the 862 or 863 can't remember behind the bracket where the power steering/alternator go it should be marked or behind on the block where it bolts up to the trans. On the genIV they had flat tops with 799/243 heads and some of the sensor were moved around (knock sensors,cam sensor,map sensor) and the gen 3 had the 24tooth reluctor wheel and gen4 have the 58 tooth.
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06-28-2012, 04:47 PM	#12
low69chevy Registered User Join Date: Jul 2011 Location: edinburg tx Posts: 174	Re: How can I tell the differense between 5.3 and a 4.8 liter LS motors I kno on 99-06 gen III engines they have dished pistons like the 04-06 moreless most of them have the 706 heads and the older ones have the 862 or 863 can't remember behind the bracket where the power steering/alternator go it should be marked or behind on the block where it bolts up to the trans. On the genIV they had flat tops with 799/243 heads and some of the sensor were moved around (knock sensors,cam sensor,map sensor) and the gen 3 had the 24tooth reluctor wheel and gen4 have the 58 tooth. Posted via Mobile Device