Recent content by 2advanced

I think your initial suspicion is correct. These shocks are designed to work with a 2" lift, whether that be via a spacer OR via the snap rings.

I am very happy with the 5100's. I swapped out all the stock shocks/struts with them and while the ride definitely feels more confident and stiffer, it is not too stiff. When I first installed them, I used the 5100's snap ring (stock upper mount) to adjust the ride height to the highest...

Nice find with that TB

If I remember right, your Envoy is 2004, so no MAF? Might it have been a good idea to replace them all (coils) at the same time?

Yes, the tread pattern on the GoodYear Duratracs is pretty aggressive and the tire diameter is 1" larger than stock. I also have a 2" Lift/Leveling kit on it. Gear ratio is also 3.42. But the thing is that even with the stock wheels and tires, my MPG's were only 1MPG better at best. Im going...

Thank you @gmcman , this most definitely helps! :2thumbsup: What year TB do you have? Is is 4WD? Your cruising Load is lower than mine, but not by much. I wonder if my tire size is what's making up the difference. :squint:

Thank you SO MUCH for showing me these logs. I had already started looking for Trailblazers that I could rent on TURO just so that I can compare my logs to one that is working well. When you say you get good gas mileage, what are you averaging? Do you have the stock intake on your vehicle...

@MRRSM You are partially correct. HPtuners did in-fact discontinue the MPVI Interface as soon as they released the MPVI2 Interface. However, the original MPVI Standard and Pro continue to be supported and are functionally almost no different than the new interface. Though rare, they can still...

I do have 4WD, but always drive around in 2WD. What doesn't make sense to me is why the converter takes so long to lock up, if at all. Also, when logging AFR in other GM cars, I've noticed that during deceleration, AFR goes sky high as I'm guessing the PCM pulls fuel to reduce consumption when...

I removed the Up-Stream O2 and plugged the hole with a rubber cork that attaches to a vacuum gauge, and there is almost no back pressure at all. Even holding the RPMs at 3k showed no measurable back pressure. I get a slight blip to about 4 psi when I stab the throttle at idle but it immediately...

So after placing the stock intake back on and replacing the injectors, my gas mileage is still ~10mpg in the city and ~16 mpg on the highway, and the truck just feels sluggish and weak. After going out for a cruise so I can log some data, I noticed that my Calculated Engine Load is pretty high...

PARTIALLY SOLVED: My high negative LTFT was being caused by the Volant After-Market intake. Putting the stock Intake back on solved the issue, however, my gas mileage is still terrible. I had already purchased a set of refurb injectors so I decided to take on the task of replacing them, and...

Gibson makes a complete Bolt-On Cat-Back system for a good price. From what I've read, it's not too loud and not too quiet either. https://www.summitracing.com/parts/gib-315597/overview/make/chevrolet/model/trailblazer

Wow, thank you so much for this information! I would have lost my mind trying to figure out why the IM won't come off after removing the obvious 9 bolts. I spent part of the afternoon taking screenshots of the HPTuners interface after doing a little more troubleshooting. I'm convinced I must...

Yeah, I noticed nobody uses it for trouble-shooting during my search through this forum. I will look for Moosemans thread and put up some information along with some screenshots of what's available for this platform. I already had mine for Tuning purposes on a Cadillac CTS-V that I have. I...