ls1 hot cam in a 2000 4.8

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12-25-2004, 06:44 PM

#11

GMPartsGuy

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ECM mapping

Quote:

Originally Posted by sfj

im not it will probably void it because there will HAVE TO BE an aftermarket tune done on it GM wont be able to provide you with one that would work or they would reflash your pcm wich would screw you up big time with that little motor and big **** cam

On the GM Hot Cam, it is not a "have to" requirement to map the ECM. The GM ASE Technician can set the vehicle to "learn" mode and re/tune the OE ECM. The cam will make a noticable diffrence in the idle, but the vehicle will run and run good.

I reccomend the "aftermarket" tuning...(NelsonPerformance)....because you just get so much more power besides the cam. But don't tell the GM Dealer you're going to have a Custom tuned ECM, and they'll not say anything.

Like I said in my other reply....it is at the Dealers discretion, and it for a legal protection purpose. My dealership has no problem with the install, even with the custom tune, hell....you're spending your hard earned money with us...why should we be dicks?

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12-26-2004, 01:19 AM

#12

red53gmc

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Quote:

Originally Posted by GMPartsGuy

There is a Warranty Administration Bulletin from GM on this subject, sent to us GM Dealership Operations. It cover the subject of aftermarket parts voiding the warranty, but a Genuine GM Part properly installed by a GM ASE Cert. Tech will be covered by the vehicle warranty if applicable.

But the warranty is void if the cam is put in a 4.8L engine. That cam was designed for the 5.7L LS1 only.

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12-26-2004, 04:26 AM

#13

GMPartsGuy

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Read this.

Quote:

Originally Posted by red53gmc

But the warranty is void if the cam is put in a 4.8L engine. That cam was designed for the 5.7L LS1 only.

hey man, the LS1 5.7 "350" is the same design as the Gen 3 4.8, 5.3 and 6.0 engines. It's called the LS1 basis design, the 5.7LS1 block is the same design as the 4.8,5.3 and 6.0 Gen 3's. Exactly the same, geometricly, physically and all the way to the engine cast. Why do you think this website is called LS1tech and they have a Truck Forum, and all of these guys interchange and use LS1 parts on the Gen. 3 truck engines.

Go buy you a set of used LS1 heads from a SS Camaro or Trans-Am and they will bolt right on to your engine. And, you'll get a bit more horsepower too.

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