Sprint Tuner - S1000

Worked as expected, had no major issues. Easy to install and use, just hooks up to the OBD2 port.

Love the Diablo module! Smoother idle, increased power, and better oil pressure! I installed it on my 2013 Chevrolet Tahoe PPV. Super easy install! Plug and play! The perfect canned tune! My truck is a whole different animal when I run this. The best part is you simply unplug if you want to disable the device for long road trip mpg's. I'm hoping it will cancel, or delay the costly rebuild of a DOD delete in the future. Doesn't drain your battery while sitting. The led light turns off with the key. I left it plugged in for a week in winter temperatures, and it fired right up. A better option than the Range, because it is possible to update it. That option was worth the $19 cost difference. $208, I wish it was more affordable, like $100 lol. Probably cheaper than having it tuned at the Dealership though.

Several friends recommended a AFM disabler for my 2007 LTZ Avalanche. I read a few reviews and decided to purchase this one. It plugs directly into the port under the steering wheel. No tools needed. I've had this device for a few days now. First thing I noticed was that my gas pedal was much more responsive to my foot on the throttle, no more hesitation. Can't speak much on the gas mileage, but I can say my truck sounds and drives much better than before. It does have a red light that shines while the truck is on, but goes away when the truck is off. The red light is pretty bright at night, if you don't like it use electrical tape. I'll update should something go haywire in the future. But until then, this has been a solid purchase and upgrade.

2014 GMC Sierra 5.3L. Bought this truck used with 20k miles in Nov 2017. I was not happy with the AFM after driving it for several weeks. I had observed huge clouds of smoke on occasion when the AFM kicked in or out. Big blue clouds of burning oil. Dealer stated they couldn't find anything wrong. Also, the truck seemed to shift very unevenly and the AFM kicked in and out frequently. So I took a chance on this AFM delete module. 90 days in and I am quite pleased. No more burning oil. Shifting is much smoother and the truck much more responsive (hesitation on take off is gone) and this has had little to no impact on my mileage except for long distance expressway trips. With AFM I have hit 23.6 MPG. Without is 20.3. However, if this is a concern, just unplug it before you start your vehicle if planning a long trip. I would recommend this to anyone curious to what the AFM delete can do for them. Now that my warranty is over, I may do the physical AFM delete as I intend to keep this truck for a long time. As you can imagine, that is a substantial amount of work and not cheap making this trial perfect.

Made my 2007 Chevy Silverado 1500 with the 5.3L engine run so much better! Not as many hard shifts, doesn’t miss as much as it was before the tuner. Thanks

Did not work my lifters collapsed while plugged into ob2 no lights blinking totally a dummy plug had computer geek look at it said there’s no software inside of the chip ANSWER YOUR MESSAGES AND send me my refund!!!! Or better business bureau will be notified

I was not one of the lucky ones who knew about this amazing little gadget you pop in your truck and just go before having to replace the screw up that Chevy clearly made. My truck was repaired and popped this little piece in and 100% you can feel the difference. I have a 2010 Chevy Silverado LTZ. My gas mileage is not a noticeable difference. The truck runs much smoother and I couldn't be happier. I am not having any issues or interference with any other components on my truck. Definitely worth the purchase to avoid thousands of dollars in repairs. When I get the truck inspected I just remove the FMD and truck passes no problem at all. Doesn't affect anything but what it is intended for. If you have a Chevy and the flex fuel 5.3L engine I highly recommend you invest in this.

Easy to install, plug and drive! This is solely based on my experience with this device only and not opinions of others. I installed the device as soon as I got it the day of a very long drive. This drive has been all highway so far and I have not experienced any issues. Before getting this device my gas mileage on average was in the 14s and the engine was mis-firing. Since installing this device I have not felt any misfires and have received no engine codes. Very happy with my purchase for my 2013 Chevy Silverado 1500 5.3 L engine. I’ll provide an update as time goes on. Also I want to give Kudos to the vendor, Midwest Aftermarket, because I had originally ordered the product through another vendor and the item was severely delayed due to current events. Midwest Aftermarket couldn’t guarantee next day delivery but they came through! Thank you Amazon and Midwest Aftermarket!!

I want to rave about this product. My '08 Silverado with the 5.3L motor developed a misfire 18 months ago thanks to a collapsed active fuel management (AFM) valve lifter. I was very pissed off when I discovered it was because of the AFM system. The AFM cuts off oil flow to special lifters that collapse on command to keep the valves closed on cylinders that are shut off. I watched YouTube videos that claimed you could fix them by just removing the valve cover and tapping here or there - nothing worked. After getting a rough estimate of $2000 from my local shop, I spent $400 on the parts and spent a weekend pulling one head and swapping all the lifters on the side with the affected cylinder and also swapping the little screen under the oil pressure sensor (and swapped the sensor just in case while I was in there). This little $5 screen is what causes the valve lifter to fail and stay collapsed that shows up as a misfire code and engine light on the dash and of course your truck runs like crap on 7 cylinders. All the oil for the AFM lifters flows through this screen on the way to the AFM lifters. In higher mileage trucks, the screen gradually gets plugged up which causes low oil flow to the AFM lifters and without enough oil flow, the lifter eventually collapses as if it was in 4 cyl mode permanently. I searched the web and even checked with the dealer to see if they could disable the AFM and found nothing. There were no easy re-programming options nearby so I've been paranoid about keeping the oil changed to maintain oil pressure and hope that it didn't happen again on the other cylinder bank every time the truck went in to 4 cyl mode. Then I found the Diablo Sport S1000. I've had it installed for a few days. Works perfectly, the AFM doesn't activate, the truck stays in 8 cyl mode with consistent power response and no more fluctuating speed as it drops in and out of 4 cyl mode. As others have commented I noticed it also shifts more smoothly, not slamming into 2nd gear under full acceleration or hauling a load like it did before. I haven't noticed an issue with it draining the battery if I leave it plugged in but I've also not let my truck sit long enough yet either. So I highly recommend installing this product in your truck's OBD port. If you have a higher mileage 5.3L motor and your oil pressure tends to register lower than it did thousands of miles ago, especially coming off a highway cruise then you should also change the little filter screen under the oil pressure sensor (at the back of the engine, it is a pain to do). Chances are the oil pressure is fine throughout the motor but the screen is plugged up. The Diablo Sport S1000 will make your truck more responsive, easier to drive at a steady speed, shift more smoothly and likely save you thousands in repair costs for collapsed valve lifters caused when lifters stop responding to the AFM oil cutoff system. I haven't seen a difference in mileage myself but even if it costs you a bit more in fuel, it is still cheaper than valve lifters. And no, they haven't paid me to say any of this. I am just so glad I won't have to spend any more money or time under the hood replacing valve lifters and the truck drives better also.

Love this product. After spending nearly 2k trying to troubleshoot and repair a cylinder #6 misfire I decided to bite the bullet and see if this worked for my 2014 GMC Sierra. I have had it for several months and it hasn’t shifted to V4 once. I haven’t noticed a difference in fuel mileage either. Well worth the $ and it has significantly increased ease of shifting (and less noticeable shifting) This also got rid of the exhaust rattle when in V4 and as an added bonus it got rid of a frequent error code: p0137 (downstream O2 sensor low voltage) All in all 5 stars, I actually enjoy driving my truck again and I will consider a full afm delete in the future.

Work perfectly ... I had a collapse lifter in cylinder #6 so I take the intake off and the velom and knock the lifter until the unblock ... and then I flush the ECM code and put this box in the OBD2 plug and I try it on the road and work perfectly .... good stay stay on v-8 all the time so the lifter that getting stock on v-4 doesn’t never gonna get stuck again and have a random misfire ... really good product

It works as advertised on my 2007 gmc.

we installed this about a month ago. was a little iffy on price and the fact that most shops were saying we'd have to change cams or overhaul or something crazy price wise for a 11 yr old truck . haven't had a problem with it yet, the only thing is you have to fix the problem first this is just a stopper, like a plug it stops the stupid switching option but if its sticking between options like ours was you have to fix the problem first which makes sense . its meant to be a plug and that what it is . worth it !