Diagnostics
Codes, live data, and a straight answer before parts get ordered.
In-houseAny make. Any goal.
Daily, classic, or built for the desert. CustomGM diagnoses it, lifts it, and gets it back on the road.
The shop
Work we actually do
General repair
The stuff that keeps a vehicle on the road. Diagnosis first, then the fix.
In-houseEngine building
Short blocks to full assemblies. GM is home base. Other makes welcome.
In-houseEngine tuning
Calibration that matches the hardware, not a canned file.
In-housePerformance
Mods that add power without turning the car into a project that never finishes.
In-houseFabrication
Mounts, brackets, and the metal the catalog does not sell.
In-house
How a vehicle comes in
No surprise invoices
01
Drop-off
We log the complaint, miles, and mods before a wrench turns.
02
Diagnosis
Data first. You get the finding and the price before we order parts.
03
Build
Torque specs, photos, and a road check before you pick it up.
Brands we run
Hardware we stand behind
Texas Speed
Dan's Diesel
WC Fab
Mahle
Cloyes
Holley
WIT
Sonnax
HP Tuners
Superior
S&B
Vibrant