Walker Performance

Walker Performance Certified Advanced Tuning for GM Gen III/Gen IV LSX & Gen V LTX platforms. In person, remote and mail order tuning are available.

Supporting HP Tuners & Holley EFI.

02/04/2026

Update on yesterday’s post…

For me, it doesn't get much more rewarding than fixing a customer's drivability issues.

This 6.0 swapped '06 Sierra came in shifting harder than your uncle's backyard-built TH400 and smelling like it had a 1050 Dominator carb. Along with that, the ABS/Brake lamps were illuminated, including a service brake system message on the dash. Driveability was subpar.

Investigation found the shift pressure table to be maxed out at 96 psi in all cells, 3.23 gearing programmed with 3.73 gears installed.

This truck with an unknown cam, unknown stall speed and very limited information now runs and drives like it's supposed to and makes great power for what it is.

Thanks to Angel Huizar for letting me get this dialed in for you!

I constantly get calls about drivability. This one showed up this morning with ALL the shift pressure. Why? 🤡 Completely...
02/03/2026

I constantly get calls about drivability. This one showed up this morning with ALL the shift pressure. Why? 🤡

Completely unnecessary. The transmission is built with a shift kit as well. Shift firmness is very subjective, but there’s absolutely no reason to add this much on top of what you’re already getting mechanically.

11/14/2025

with !

Stopped by and knocked out some tuning on Russ’s ZO6, in order to do a first startup.

This car is basically a C6 with a C5 Body. Everything from top to bottom has been touched. One off custom pieces everywhere, suspension, custom cage, hand tig-welded 3” exhaust done by Garrett at KWO, dry-sump conversion… A LOT of talent was put into this car.

That beautiful symphony is brought to you by a 408ci stroked LS3 assembled in house at KWO, featuring a 400ci + camshaft and supporting valvetrain. It breathes from a custom, OTR ram-air intake and exhausts through a set of 2” LT’s.

There are a few things to button up, but we’ll be breaking it in on the street next week, followed by some track tuning after the break in period.

Thanks to Kent and staff for allowing me to be a small part of this big project. Your knowledge and hospitality is always appreciated.

09/19/2025

Thanks to my long time customer John for letting me get this awesome ‘66 GMC dialed in for him.

This pro-touring style, work in progress features a custom chassis, Aldan American coil overs, Wilwood Disc Brakes, wheels and many other hand made truck parts.

The power plant is a fully forged L83 featuring a Brian Tooley Racing Stage 2 cam, backed by a CD009 transmission.

Can’t wait to see this one once it’s finished!

09/16/2025

Chevrolet Performance CAI install + tune on an ‘07 RSCB for .morenoo today.

The truck was calibrated for 4.10’s and 31” tires. I found that it had 3.73’s and 29” tires, so we fixed that. All torque management was disabled in the trans file, plus someone added 30-40 psi to the shift tables. 😳 this practice isn’t needed with a shift kit and corvette servo…

Now, that 4L60 is shifting like it should.

I’d like to thank Mikey for his patience and fellowship today.

Also, thanks to United By Trucks and a few others for their referrals.

Big progress this week on 's '68C10!gaddy and I removed the old fuel tank and lines, stock exhaust and transmission cros...
08/07/2025

Big progress this week on 's '68
C10!
gaddy and I removed the old fuel tank and lines, stock exhaust and transmission crossmember.

This morning, we finished assembling the LQ9 long block and lowered it down on the mounts this afternoon.

Also added a nice touch with those ceramic coated manifolds!

Soon, we'll have the .mafia built 4L65 in place, along with some of the best products made to finish this truck up. Looking forward to this one!

This '16 Denali XL came in this morning for some bolt on performance and a custom tune. We had it ready to go and it was...
08/06/2025

This '16 Denali XL came in this morning for some bolt on performance and a custom tune. We had it ready to go and it was picked up on the same day.

For starters, we installed a Volant Performance CAl w/ the Power Core Filter.

After that, we vastly improved the exhaust note and performance with a full stainless cat-back system from CORSA Performance.

To finish things up, I added custom tuning using HP Tuners to wake up the L86 engine and completely changed the driveability of the 8L90 transmission.

This is a great recipe for all around performance, improved economy along with night and day driveability.

If you're interested in having these services performed on your vehicle, send a direct message or email me at [email protected].

Thanks to Jay at for allowing us to get the Yukon set up!

Thanks to Elijah Gaddy for working with me this week. Your help is greatly appreciated!

Cold start in the comments!

07/12/2025

Thanks to Hernan for choosing .

Awhile back, he brought his PCM by the shop for a bench tune. After driving it and getting some break in miles logged,he brought the truck to be final tuned today. Just listen to that 5.3 chop thanks to the Texas Speed & Performance Chopacabra!

If you want your vehicle to sound like this, send me a message! I’m a Texas Speed dealer and will beat anyone else’s prices.

06/11/2025

Thank you to remote tuning customer Lionel S! He was having issues and I was able to get this Holley Terminator X equipped C10 fired up for him. Listen to that 6.0 count them off!

05/31/2025

Thanks to Zach at Reeve’s Towing for allowing us to be a part of this 2000 Sierra’s resurrection. It’s equipped with a Summit Racing Equipment 450 HP crate engine and drives like it’s stock until you put the pedal down. Call/Text/PM to get on our schedule!

Our local customer Thomas G. received a full street tune after installing a cold air intake and exhaust on his ‘17 Sierr...
05/11/2025

Our local customer Thomas G. received a full street tune after installing a cold air intake and exhaust on his ‘17 Sierra.

He just averaged 19 mpg on his weekend trip in a full size, 4wd truck.

If you’re interested in increasing fuel economy, longevity and adding power to your ‘14-‘18 GM truck, call/text/message me and I’ll be glad to take care of you.

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Gainesville, GA
30506

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm
Saturday 8am - 5pm

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