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Cam Swap in Higher Mileage Sierra 5.3

Cam Swap in Higher Mileage Sierra 5.3

Postby BigBen17 [OP] » Sep 16 2020, 8:04pm

Hey gents/gals! I have a 2015 GMC Sierra 1500 5.3 and am debating on whether or not I should put it a new performance camshaft in. I am wanting to get the Texas Speed 218/226, .635"/.635", 113 LSA . My truck currently has 139k miles on her so that’s why I’m debating if it’s okay to install a performance cam on a higher mileage truck. Was also thinking of maybe getting LS7 lifters as well.

Any thoughts on this matter is greatly appreciated. Thx!
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Re: Cam Swap in Higher Mileage Sierra 5.3

Postby GBSierraSLE » Sep 17 2020, 1:29am

As long as your engine is in sound condition, there is no reason not to swap-out the cam/lifters to eliminate AFM and give you a little bump in power. 139k really isn't a lot as long as it has been maintained properly.
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Re: Cam Swap in Higher Mileage Sierra 5.3

Postby BigBen17 [OP] » Sep 17 2020, 2:16am

I’ve had the truck for about 10k miles now and from what I can tell there’s absolutely nothing wrong with it at all. The previous owner took good care of the truck and I myself am very enthusiastic about taking care of my vehicles.
Thx so much for the reply! I’m going to definitely be doing a cam/lifter swap now! :)
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Re: Cam Swap in Higher Mileage Sierra 5.3

Postby QNman » Oct 07 2020, 11:31pm

Questions:

- Are any other performance mods either included or already complete?
- Do you have a target in mind, or just chasing numbers?

At the very least, you're going to need to open up the airway a little bit (CAI and/or catback) and a tune.
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Re: Cam Swap in Higher Mileage Sierra 5.3

Postby BigBen17 [OP] » Oct 08 2020, 1:35am

Thx for the reply! I don’t have a target in mind just chasing numbers I guess.

- I’ve installed a K&N air intake, Throttle body spacer, cat-back exhaust system and I have a superchips flashpaq.
Although the flashpaq isn’t made much of a difference. Has helped with smoothing out the shifts tho!
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Re: Cam Swap in Higher Mileage Sierra 5.3

Postby shakenfake » Oct 08 2020, 1:47am

That cam may be a bit big for a 5.3, most people will recommend you change torque converter though with a cam of that size.

Also I am sure you know but the cam swap is much more expensive than just buying the cam and the lifters. I always put that out there so people know and I am sure they are tired of hearing it but a cam swap is roughly around $1100 at least and that is if you are installing it yourself. Just want to put that out there
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Re: Cam Swap in Higher Mileage Sierra 5.3

Postby QNman » Oct 08 2020, 5:52pm

shakenfake wrote:That cam may be a bit big for a 5.3, most people will recommend you change torque converter though with a cam of that size.

Also I am sure you know but the cam swap is much more expensive than just buying the cam and the lifters. I always put that out there so people know and I am sure they are tired of hearing it but a cam swap is roughly around $1100 at least and that is if you are installing it yourself. Just want to put that out there

Another excellent point.

Having the CAI and exhaust helps. I don't think your Flashpaq will work for cams, but I'm not as familiar with them, so maybe they can... I'd certainly want to check.

I'm not trying to be discouraging - just go in with eyes wide open.
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