I have seen in an auto mag long ago a trailblazer that was supercharged. I am curious if there is a bolt on supercharger available, I have a 03' Trailblazer LS.



I'm not aware of one. It's a brand new engine starting in 2002, but there could have been some development for bolt-on mods after the fact. I would be interested in seeing if any existed.
Steve
02 Chevy Trailblazer LS (110K+ miles - loaded except for 4WD - WRECKED!)
99 Chevy Cavalier LS (105K+ miles - commuter car)
78 Chevy Suburban Silverado (454, 3/4 ton)
62 GMC 3/4 ton Pickup (350 police interceptor)
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There is going to be a hotter version of the TB. Maybe that was it?
John ~ New Mexico ~ It's all about the bowtie!
2007 GMC Envoy & 2010 GMC Sierra
Whipple used to make a supercharger kit for the 4.2L I6, but I am pretty sure it was discontinued due to lack of sales and interest.
The hotter version is the TrailBlazer SS. It is available in 2WD or AWD (yes, AWD, not 4WD) with a variant of the LS2 Corvette engine. V8, 6.0L, = ~12mpg.
~Erik~
2002 Chevy TrailBlazer LT 4WD Summit White/Lt. Oak
Epic Performance (me) custom tuned w/EFILive FlashScan V2, K&N FIPK2 CAI, Magnaflow Dual Catback
Eibach 1.5/2, Bilstein HDs, Hotchkiss rear swaybar + poly bushings all around, Dueler A/T Revos
6000K Low/fog HID + Quad Beams mod, The NorthFace Edition clearance lights, mirror turns+running light mod
Infinity Kappa 104.7w + JBL CS300.1 + Q-Logic form-fitted box
Redline Tuning hood lift struts, debaged/demolded
Lots more...

I wasn't aware that anyone had developed a supercharger for the engine. They should stick with it becuase this is a solid engine and will be around for a long time.
There are still enough people who want to boost engine performance and are willing to put a supercharger on to do it.
John ~ New Mexico ~ It's all about the bowtie!
2007 GMC Envoy & 2010 GMC Sierra
I have heard that the reason it was never mass marketed is because there wasnt enough interest in it when it was announced. If you go back and look, there is one for the Colorado already, and it came out in 04? I think.
~Erik~
2002 Chevy TrailBlazer LT 4WD Summit White/Lt. Oak
Epic Performance (me) custom tuned w/EFILive FlashScan V2, K&N FIPK2 CAI, Magnaflow Dual Catback
Eibach 1.5/2, Bilstein HDs, Hotchkiss rear swaybar + poly bushings all around, Dueler A/T Revos
6000K Low/fog HID + Quad Beams mod, The NorthFace Edition clearance lights, mirror turns+running light mod
Infinity Kappa 104.7w + JBL CS300.1 + Q-Logic form-fitted box
Redline Tuning hood lift struts, debaged/demolded
Lots more...
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