Ok guys, i just bought me an 06 silverado and it feels quite a bit stronger than all the older 5.3's i've had and drivin. I know they got electric fans but what else did they change? I know the specs on some of the older 5.3's but what is it on an 06?

 

Valves - Valve Lift - Intake
11.6 mm
0.457 in
Valves - Valve Lift - Exhaust
11.85 mm
0.466 in
this for 2005 LM7 5.3L give me the pro code for you current engine and will post to you

2005 and 2006 r the same diffrence started from 2007 where the lift increased to 480

 

Pro code? What and where is that? Are you talkin about the three letter code like lm7? And do you not know the duration and lsa?

 

RPO code . . . they're in the glove box

 

pass me the vin number ?

and i hope to give every thing
i just have the SI mnaual from GM

 

I dont have the vin number handy but the rpo code is lm7

 

L59 = flex fuel, so the fuel injectors are bigger. E-fans, too, as you've already pointed out. Is it possible your '06 has a lower gear ratio (higher numerical value) like a 4.10?

 

191 intake 190 exhaust 114lsa 116 intake lobe centerline "2* retarded stock

 

sorry it should be DOC not txt

but this all info about LM7

 

LM7 is the regular L59 is flex fuel