Riley Auto Care& Transmissions
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HP Tuners Certified

Cadillac Repair & Service in San Marcos, Texas

The standard of the world in American luxury. Riley Auto Care & Transmissions has been servicing Cadillac vehicles in San Marcos, TX since 1978.

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Cadillac Models We Service

Cadillac EscaladeCadillac XT5Cadillac XT6Cadillac CT5Cadillac CT4Cadillac XT4Cadillac SRXCadillac CTSCadillac ATSCadillac XTSCadillac Lyriq

Don't see your model? We service all Cadillac vehicles — call us to confirm.

Services for Cadillac Vehicles

  • Transmission Rebuild & Repair
  • Transmission Flush & Service
  • Engine Diagnostics & Repair
  • Brake Service & Replacement
  • A/C Service & Recharge
  • Oil Change & Fluid Services
  • Electrical Diagnostics
  • Suspension & Steering Repair
  • General Maintenance
  • HP Tuners Performance Tuning
  • 10L90 Transmission Service
  • Northstar / Blackwing Engine Service
  • AFM Lifter Repair

About Cadillac Service at Riley Auto Care

Cadillac has been America's standard of luxury since 1902, and today's lineup — from the commanding Escalade to the sport-focused CT5-V Blackwing — represents the pinnacle of American automotive engineering. These are vehicles built for drivers who expect the best, and they deserve service from a shop that holds itself to the same standard. Riley Auto Care & Transmissions services the complete Cadillac lineup with the expertise and attention to detail these vehicles require.

Cadillac's 6.2L V8 engine — found in the Escalade, CT5-V, and CT4-V — is one of the most powerful naturally-aspirated V8s in production. Like other GM V8s, it uses Active Fuel Management (AFM) technology that can develop lifter failures over time. We can perform lifter replacements and AFM system disabling to prevent recurring issues. As HP Tuners certified technicians, we can also unlock additional performance from Cadillac's Blackwing and LT-series engines through professional ECU calibration.

Cadillac's 10L90 ten-speed automatic transmission — shared with Corvette and Camaro — is a sophisticated unit that benefits from regular fluid service. The older Northstar V8 found in pre-2011 Cadillacs has well-documented head gasket and oil consumption issues that we are experienced in diagnosing and repairing. Serving Cadillac owners throughout the region, we deliver the premium-grade service your vehicle was built to receive.

HP Tuners performance tuning software — used by Riley Auto Care & Transmissions mechanics in San Marcos TX

HP Tuners Performance Tuning Available

Riley Auto Care & Transmissions is HP Tuners certified. We can unlock the full potential of your Cadillac with professional ECU tuning — improving power, fuel economy, and drivability.

Why Bring Your Cadillac to Riley?

Family Owned Since 1978

Over 45 years of hands-on experience with all makes and models.

Warranty on Repairs

We stand behind our work with a warranty on parts and labor.

ATRA Certified

Transmission specialists certified by the Automatic Transmission Rebuilders Association.

Ready to Schedule Your Cadillac Service?

Call or text us today — we're open Monday through Friday, 8AM to 5:30PM.

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