2019 2020 Silverado 6.2 Supercharger Build

[Descartian]

Just for clarification at the time of the writing you can not have your ECM tuned without it being unlocked by HPTuners. They are the only company that has been able to unlock our ECM’s. You will need to have it tuned after you receive your unlocked ECM.  

[Denali21]

Great post.  Thanks for the info.  I’m looking to install a Whipple SC on my 2021 Denali 6.2 and you guys addressed some of my questions as well.

[Descartian]

7 hours ago, Denali21 said:

Great post.  Thanks for the info.  I’m looking to install a Whipple SC on my 2021 Denali 6.2 and you guys addressed some of my questions as well.

My suggestion is do it as soon as possible and enjoy your truck. 

[Denali21]

2 hours ago, Descartian said:

My suggestion is do it as soon as possible and enjoy your truck. 

Would really like to but I’m a little hesitant since my truck only has about 600 miles on it and I’m sure GM will screw me on my engine warranty if I install a SC.  

[kodiakdenali]

You wont regret it!

 

Do your research on who you get to do the work (unless you are able to do it your self of course.) My tuner has an impeccable reputation in thenlocal community, and just as importantly mine was not the first t1 he's done. He did however still have issues and setbacks on the computer end. I dont know all the details. At one point the keys worked but the remote start didn't.  He got it all working perfectly in no time but it did require research and apparently subscribing to some advanced diagnostics and tools to make everything happy. He said there were some complications with the 20 he didnt have on the 19 he did also. I dont know details, but these trucks dont like to be tuned. It takes someone who knows their stuff. I think he spent about a day just trying to get all the tuning, computers, anti theft etc happy and a day and a half installing the blower itself.

When you pick a tuner ask if they've dug into a t1 before...make sure they are on good terms with a dealer who has access to gm tools in case they get locked out. Didnt happen to us, but he had that as a backup plan.

Def not intending to scare you, just saying make sure you pick a tuner/shop that is up to the task.

[kodiakdenali]

2 hours ago, Denali21 said:

Would really like to but I’m a little hesitant since my truck only has about 600 miles on it and I’m sure GM will screw me on my engine warranty if I install a SC.  

It's a risk you have to accept.

It's illegal for gm to void your warranty because of a supercharger or any other aftermarket part. Technically in order to even deny an individual claim they have to prove tbat the aftermarket equipment caused or contributed to the failure. While that all sounds good, i wouldn't put it past a dealership to decide after their investigation that these led license plate lights (yet alone a mod such as a blower!) Are the reason your valve springs broke and toasted the engine. And should they claim that what's your recourse? Hire a lawyer and spend more in legal fees than paying for a repair out of pocket?

Rest assured if there's any way to deny a claim, they will.

Both procharger and whipple offer a powertrain warranty through a 3rd party if you want to have the extra peace of mind.

Edited February 22, 2021 by kodiakdenali

[Denali21]

1 hour ago, kodiakdenali said:

Its a risk you have to accept.

Its illegal for gm to void your warranty becasue of a supercharger or any other aftermarket part. Technically in order to even deny an individual claim they have to prove tbat the aftermarket equipment caused or contributed to the failure. While that all sounds good, i wouldnt put it past a dealership to decide after their investigation that these led license plate lights (yet alone a mod such as a blower!) Are the reason your valve springs broke and toasted the engine. And should they claim that what's your recourse? Hire a lawyer and spend more in legal fee's than paying for a repair out of pocket?

Rest assured if theres any way to deny a claim, they will.

Both procharger and whipple offer a powertrain warranty through a 3rd party if you want to have the extra peace of mind.

Very true.  I’ll check with my dealer just for kicks.  That’s again for all the helpful advice.

[darkhorse220]

Ordered an ecm to send into HP to help reduce how long truck will be down. 

 

Still havent ordered the supercharger yet. Im thinking Whipple, although the easier install of the procharger is nice. 

 

Anyone install the Whipple themselves? Just wondering of any pointers beforehand. Any tunes out there better than the Whipple tune?

 

What other mods/upgrades has anyone really liked? I've always built lifted trucks, wheels/tires, etc. I'm going for a bulletproof high power build on this one. 

[TNTSierra]

25 minutes ago, darkhorse220 said:

Ordered an ecm to send into HP to help reduce how long truck will be down. 

 

Still havent ordered the supercharger yet. Im thinking Whipple, although the easier install of the procharger is nice. 

 

Anyone install the Whipple themselves? Just wondering of any pointers beforehand. Any tunes out there better than the Whipple tune?

 

What other mods/upgrades has anyone really liked? I've always built lifted trucks, wheels/tires, etc. I'm going for a bulletproof high power build on this one. 

Good luck. . If I wasn’t swapping out a 350MAG into my boat I would be all for this. About same amount of money. But with our lake house, I use the boat all summer long. My goal is to get 6 or 7 skiers up this year. 4 was the max I got out of my little 4.3L MPI. 

[Descartian]

While you’re in there I would go headers and exhaust. A fuel pump booster would also be helpful. With the extra mods, if you find a good tuner a dyno tune will be better. If just running the whipple stay with their tune. 

[NorCal2020]

I may be coming in to a bit of cash soon, was planning on a BDS lift and a whipple. Whipple is down in Stockton, was gonna see if they do installs, if so, was just gonna drop the truck off and throw cash at them to do it all right and return to me a boosted truck :D. That way I don't have to deal with waiting for this part or that part, just give it back when its done haha

[AEmedic]

Callaway is another option, albeit an expensive one.  However, it is fully warrantied for up to 5 years and can be serviced at any Chevy dealer. 

 

Callaway Silverado (callawaycars.com)

 

I am having mine done this summer and look forward to 602 HP without losing any warranty coverage.

 

Yes, it is EXPENSIVE!

[Descartian]

50 minutes ago, AEmedic said:

Callaway is another option, albeit an expensive one.  However, it is fully warrantied for up to 5 years and can be serviced at any Chevy dealer. 

 

Callaway Silverado (callawaycars.com)

 

I am having mine done this summer and look forward to 602 HP without losing any warranty coverage.

 

Yes, it is EXPENSIVE!

The problem with shops like Callaway, Roush, Hennessy and others is you’re paying for the name. That’s great if you want their name plate on your truck but there are better options out there at a fraction of the price. 

[AEmedic]

2 minutes ago, Descartian said:

The problem with shops like Callaway, Roush, Hennessy and others is you’re paying for the name. That’s great if you want their name plate on your truck but there are better options out there at a fraction of the price. 

I won't argue your first point, other than to say that is a matter of perspective.  However, you are incorrect that there are "better" options...There are just different options!

[Descartian]

3 minutes ago, AEmedic said:

I won't argue your first point, other than to say that is a matter of perspective.  However, you are incorrect that there are "better" options...There are just different options!

Fair enough, better is subjective.