Andres Ledezma

Mechatronics Engineer

Andres Ledezma

Mechatronics Engineer with 5 years of experience at General Motors' Ramos Arizpe Assembly Plant, progressing from Maintenance Group Leader to Process Engineer to Lead Manufacturing Engineer.

Now working toward a career in controls engineering, robotics and programming.

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Projects

TypeQuest

Free Learn-to-Code Web App · typequest.cc

Built with Claude Code
Visit typequest.cc
  • Designed and launched a free, mobile-first programming course web app with no ads and no account required, installable on a phone's home screen.
  • Covers Python, JavaScript, Go, C, and SQL, with real code running directly on the user's device.
  • Includes a computer vision track using real OpenCV and an industrial robotics track, connecting programming to manufacturing and automation applications.
Computer vision track: Python with real OpenCV, recorded in the app.
Industrial robotics track: a robot program palletizing parts, recorded in the app.

Key achievements

The graphics are illustrations, not plant data.

ABS eBoost Stroke Test Failure Reduction · OpEx Leader, Project #7507 (Quick Win, RedX)

~$300K cost avoidance per plant, across 6 plants Fixed a North America-wide brake stroke-test failure by catching leaks before brake fill; 3,000 rework hours eliminated.
Problem
A North America-wide brake pedal out-of-position failure affected 6 plants and 3,000+ vehicles. Defects were only caught late at the end-of-line OBD-II flash & test station, after brake fluid fill, forcing a full system purge and rework on every affected unit.
Action
Applied RedX methodology to trace the dominant cause to moisture inside a supplier-provided component, then tightened the vacuum decay leak-test limit from 1.5 to 0.9 mmHg so faulty units are rejected before brake fill. Rolled out the change to all 6 affected plants through a Tool & Equipment Bulletin (TEB) update.
Result
~$300,000 USD cost avoidance per plant, with 6 plants affected, and 3,000 rework hours eliminated.
eBoost unit brake lines calipers rear front
Brake system on a see-through car.
0 0.5 1.0 1.5 2.0 mmHg test time old limit 1.5 new limit 0.9 rejected before brake fill pass
Vacuum decay leak-test limit tightened from 1.5 to 0.9 mmHg, so faulty units are rejected before brake fill.

A/C System Moisture Detection — Evacuation Test Optimization

~$200K rework avoided at one plant Caught moisture in A/C systems before refrigerant charge, with the same early-detection approach as the eBoost fix; two more plants involved.
Problem
Moisture introduced by a supplier's A/C components went undetected until after refrigerant charge, so affected vehicles needed refrigerant recovery, re-evacuation, and recharge.
Action
Applied the same early-detection approach as the eBoost project, adjusting the A/C evacuation & fill machine's vacuum decay parameters so moisture-contaminated systems are rejected before refrigerant charge.
Result
est. ~$200,000 USD in rework avoided at one plant, with two more plants involved.
condenser compressor evaporator moisture rear front
A/C system on a see-through car.
pressure rise evacuation hold time adjusted limit moisture: rejected before charge dry: pass
Evacuation & fill parameters adjusted so wet systems are rejected before refrigerant charge.

Front Drive Unit Leak Prevention (2024 Equinox EV / Blazer EV)

Front drive unit leaks prevented Made the BEV drive unit and the ICE engine use one bolt, so a too-long bolt can no longer damage the drive unit case and force a front drive unit replacement.
Problem
On some 2024 Chevrolet Equinox EV and Blazer EV, the similar, longer ICE engine bolt could be installed by mistake on the electric drive unit. The too-long mounting bolt damaged the drive unit case and caused a fluid leak, and the field repair was replacing the whole front electric drive unit (GM Customer Satisfaction Program N24247).
Action
Led the change to a single bolt part number for the drive unit and the ICE engine, so the wrong bolt can no longer be installed.
Result
Root cause removed at every plant building these drive units, avoiding more leaking drive units and front drive unit replacements under GM coverage.
stops in the case wall drive unit bolt longer ICE bolt case damaged: fluid leak drive unit case
Before: the longer ICE bolt fits the same hole and damages the case.
BEV drive unit ICE engine one bolt part number no mix-up possible
After: one bolt part number for both, so the wrong bolt can't be installed.

Contact

Location
Saltillo, Coahuila, Mexico