99 z28 cam on 99 5.3l

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Nov 17, 2003 | 03:34 PM

davidmtz

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From: mcallen, texas, usa

99 z28 cam on 99 5.3l

Will a 99 z28 cam work on a 99 5.3 gmc sierra? and if so do i need to change anything on the 5.3, like springs or anything else. Do i need to reprogram the pcm or can it stay the same.

Thanks

Nov 17, 2003 | 04:26 PM

silent1

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Quote:

Originally Posted by davidmtz

Will a 99 z28 cam work on a 99 5.3 gmc sierra? and if so do i need to change anything on the 5.3, like springs or anything else. Do i need to reprogram the pcm or can it stay the same.

Thanks

Not worth the trouble:

https://ls1tech.com/forums/showthread.php?t=112450

Nov 17, 2003 | 04:28 PM

FILE

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From: Truck Heaven

David, here are the specs on both cams.

-1998-2000 LS1....198/209 .500/.500 119.5
Part #'s 12557812/1256965 (part # change mid 1998)

-2001-2002 LS1....196/207 .467/.479 116

LR4, LM7, LM4

-1999....191/190 .457/.466 115.5
Part # 12560966

-1999-2003....191/190 .457/.466 114
Part # 1256097 (Some 1999's had this cam)

As far as springs and pushrods, you should be fine with the stock springs since the max lift for these are .500.