Im in Texas, they also check for smog in exhaust and stick some probe into the tail pipe in seems it runs rich cause I can smell the fuel especially the inatial start up in the morning. Will this effect emissions? Other than that everything seems to be running normal. THX

I have a 06 silverado 4.8l i currently have trueflow intake, magnaflow cat-back, and predator U-7192. I have swaped the stock ring and pinion for 3.73's. Do i need to set the truck back to stock settings for the state emissions? Cuz i cant drive it to far in stock settings before all kinds of check ...

I brought up this topic before but didnt get the answer I was looking for. I have an 06 silverado 4.8L 2wd automatic and predator U-7192. Im doing a gear swap from the stock 3.23 to 3.73 ratio. You explanied to adjust parameters for the 3.73 axle ratio for speedo and odometer corrections . What I ...

Ok once the speedo is set at what MPH do i set the shift points at for each gear?

Will this adjustment take care of the shift points to. Or do I have to do that seperatly if so what is a good starting point?

No its a 2wd automatic. Sorry for not making that clear.

I've got a 06 silverado 4.8L with 3.23 gear ratio I'll be changing it to a 3.73 soon. What adjustments do I have to make on my U7192 to make my truck shift properly???

K THX FOR THE QUICK RESPONSE

I have a 06 silverado. Once the program is installed either on 87tune or performance tune the truck starts roughly like it wants to stall out is this normal? Does it have to do with the gas cause the highest octane in my area is 91? Previously with the Hypertech max energy it would do the same thing ...

I have a 06 silverado basically all stock. I have the stock 3.23 gear ratio I plan to do a gear swap to a 3.73 ratio other than adjust the parameters for gear ratio do I have to re-adjust the shift points aswell? And will this void my warranty due the fact that I have to keep the tune at all times ...

I have a 2006 silverado 4.8l with true flow intake and predator U-7192. While torque braking the engine RPM only reaches 1500rpm with the diablo tune it reaches 1700rpm. Is there any way to resolve this issue to raise the RPM?

Thanks, I'll be getting back to you soon it!!! From reading the forums it seems you've helped some other GM guys all with this problem. Another thing that seems to be lacking on GM is i guess a rev limiter set for example when you press the brake and gas from a start it only revs up to 1500rpm with ...

Thanks,what is a good base to start from while adjusting fuel trims?

Thanks for the quick response. You think changing the ring and pinion to a 3.73 will help out the sluggishness? how much HP and TQ does the predator increase on the 4.8L ?

I just recently purchased predator U-7192 for a 2006 silverado 4.8L. I installed the performance tune and modified parameters to correct the speedo for 20 inch wheels. I have felt a significant increase in power but there seems be that sluggish feelling of the start from the TM. I tried to on modify ...