LS/LT Custom Tune Order Form

Order Number (From your order confirmation email) – Usually 4 or 5 digits – like 9512

I listed this first and made it required because I really prefer you place an order before filling out the form.

Customer Name

First

Last

Cell Phone Number

We may have a question or need clarify something. So please give me a number that you will actually answer or return a text message on. Help me help you.

Vehicle Year

Vehicle Model

VIN

We use the VIN to answer any questions we may have without giving you “homework”

Engine Size

In liters please – 4.8, 5.3, 6.2, etc

Remove Vehicle Anti Theft System (VATS)?

Yes
No

Note: On stock vehicles, the security/theft light on the dash may remain on, flash, or behave intermittently. This does not affect the programming changes we make in the ECM/PCM. The code is permanently modified, and the vehicle will start regardless of the security light status. As long as all other systems are functioning properly, the engine will start no matter what the body control module (BCM) indicates.

Enable Electric Fans?

Yes
No

If you’re upgrading to electric cooling fans on a GM truck or SUV, we can code the PCM to control of the fan relays. Once we enable eFan control you can wire the relays to stage 1 fan on / 2 fans on, or low speed/high speed.

Engine Swap?

Yes
No

Transmission swap?

Yes
No

If you did a transmission swap (leave blank if you didn't)

Automatic to manual
4L60 to 4L80
Something else (please enter details below)

Shift Firmness if you ordered transmission tuning (included on 4L60/4L80 vehicles)

Stock
Sport (recommended)
SEND IT (best for performance and life of transmission, but this is FIRM – you’ve been warned)

Torque Converter

Stock, 2400 RPM Stall, Specific brand and model number, etc

Rear Axle Gear Ratio

If you know your gear ratio, enter it here. We really need this for best results in transmission tuning and shifting. You can check the RPO codes (usually found in the glovebox—search the code list online), or determine it manually by lifting the rear of the vehicle and counting how many times the driveshaft turns for one full rotation of the wheel.

Rear Tire Size

i.e. 265/65R18, etc

Cam

If stock just write stock. Otherwise please tell us the brand and part number, for example, “Summit Racing SUM-8712” or just a link to the website

Heads

If stock just write stock or put the casting number i.e. “799” or “243” Otherwise please tell us the brand and part number, for example, “Airflow Research AFR-1501” or just a link to the website

Fuel Injectors

If the injectors are stock/already matched to the PCM, you can simply write “stock” and move on. If they are not stock, we need the exact brand and model number. Even if they are a larger OEM GM injector, we still need to know precisely which one it is. General descriptions like “42 lb injectors” or “600 cc injectors” are helpful for context, but they are not sufficient on their own. Accurate injector data is critical to making the correct adjustments in the calibration, so please be as specific as possible.

Fuel Octane

93
91
89
87

For stock or lightly modified vehicles, regular fuel is fine and will still provide good results. Premium fuel is best for performance. Please select what you will run, and make sure that is what is in the tank when the tune is installed. If your vehicle calls for premium fuel from the factory then you really need to use premium. If you have major modifications, such as cams, heads, or major airflow upgrades, you should run premium. Higher octane fuel is resistant to engine knock, and gives us more “room” to increase ignition timing.

Headers/Cats?

For stock or lightly modified vehicles, regular fuel is fine and will still provide good results. Premium fuel is best for performance. Please select what you will run, and make sure that is what is in the tank when the tune is installed. If your vehicle calls for premium fuel from the factory then you really need to use premium. If you have major modifications, such as cams, heads, or major airflow upgrades, you should run premium. Higher octane fuel is resistant to engine knock, and gives us more “room” to increase ignition timing.

Thermostat

Stock/165/195/etc

Disable DOD/AFM?

Yes, please make this always run in V8 mode as God intended.
No, I totally trust GM engineers and I know they have my best interest at heart.

Did you remove the DOD lifters and change them for normal lifters?

Yes
No

on Axle for

Remove Speed Governor?

Yes
No

Tell me About How You Use Your Vehicle

Daily driver, street/strip, track only, show, heavy towing, occasional towing, heavy foot, etc.

Active DTCs (list active or pending DTCs) (Do not list DTCs that say "permanent" or "history")

Diagnostic Trouble Code = DTC, commonly known as a check engine light. If no DTCs are present just put “none” or NA, or whatever. I am not here to tell you how to live your life, but some type of entry is required.

Drivability Notes

Okay so that last part is a joke. We can’t fix mechanical/electrical issues with a tune, but we will try to help you if we can.

Something else? Special Requests? We will do our best.

Need to add details/explain something? Got a question? Did I forget to add a section to this form? Use this space for stuff like that.