My 98 GMC K2500 L29 7.4 litre has 2.5" true dual exhaust with pro Flowmax mufflers an X-Pipe, cat delete but still has both upstream and both downstream o2 sensors. At times I get a dtc for bank 1 and 2 too rich. Probably cause no cats.

Truck has an Air Aid cold air induction, throttle body spacer, performance ignition wires with stock gm spark plugs. Truck has 3.73 axle ratios and a 4L80E trans, LT265/75R 16" tires. Stock tire would be LT245/75R 16". I tow a 8500lb 5th wheel in the BC mountains. I would like my speedometer calibrated and better power and torque. What is the best tune for my truck. Can the dtc for bank 1&2 too rich be modified to not trigger the code. What gains will I notice with your product? How much of the torque management system is modified? I would like the speed limiter increase as its set at 160kph from factory. Its a brand new L29 454 from GM. Approx 32000km I installed 3 years ago. 196000km on rest of the truck. ( Joe Soares, 05/16/2021 )

We can accommodate your requests for the oxygen sensors, speedometer adjustment and increased HP/TQ. You can expect about 40-45 horsepower and 45-50 lb-ft torque increase with much better throttle response, crisp shifts and there is a reduction in the "TQ Management".

Does this upgrade have a negative or positive impact on engine life? ( Todd Lucich, 05/02/2021 )

As long as the engine is well maintained, reliability is not affected.

Is the Vehicle Control Module an ECM by another name? If so, is that the unit that sits above the radiator of a 2000 Itasca Suncruiser V32 w/ L29 7.4l (454ci) Vortec? We have a complete Banks Power System and Banks Air Flow. Also, is shipping included both ways? Or if I pay to send in, is the return shipping included in the $495? Thank you. ( George Nichols, 04/23/2021 )

The terms ECM, PCM, and VCM are all used to describe the engine computer by various manufacturers, yours is located above the radiator . Return shipping is included , you are responsible for shipping to us , however if you choose the "core charge" and order the ECM , we can provide a return shipping label for your core and deduct from the core refund.

im wanting /needing power and torque. as much as possible im going to do a cam exhaust and injectors and intake so my questions are what do you think my gain would be with your pcm and can it be piggy backed with a plug in tuner thanks matt ( Matthew Hammond, 04/15/2021 )

There are a lot of variables that play into the exact gains we can achieve but I would say somewhere around 45-50 HP and 60 Ft Lb. TQ with those modifications done.