Tired of other sites pushing offshore replicas? Get genuine OEM GM fuel injectors – rebuilt in the USA, flow matched, and guaranteed for life.

Core Product Overview

Set of 6 rebuilt OEM GM fuel injectors (12634123) for 3.6L V6 SIDI DOHC PZEV (California Emissions) engines. These are real GM cores, professionally restored to exceed OEM spec and ideal for 2012–2020 models equipped with PZEV-compliant 3.6L engines.

• Authentic GM OEM cores – not aftermarket or replica
• Ultrasonically cleaned, spray pattern verified, and ASNU flow matched
• Leak tested, balanced, and sealed with new filters and o-rings
• Ready to install – no tuning or programming required
• Rebuilt in-house by Precision Auto Injectors in Sanford, FL

Backed by our lifetime replacement warranty

Symptoms of Failing Fuel Injectors

• Cold start issues or long crank times
• Fuel smell, rough idle, or misfire codes
• CEL with codes like P0171, P0300, P219A
• Drop in fuel economy or failed emissions test

Why Choose Our Rebuilt OEM Injectors?

We don’t rebuild cheap knockoffs. These are original GM 12634123 injectors from vehicles with PZEV emissions, restored with ASNU calibration tools for precise spray and flow balance. Guaranteed to meet or exceed factory spec.

Vehicle Compatibility

Fits select 2012–2020 GM 3.6L PZEV V6 models with California Emissions package:

• 2013–2019 Buick LaCrosse – CX, CXL, Premium, Leather, Touring
• 2013–2014 Cadillac ATS – Luxury, Premium
• 2012-2020 Chevrolet Impala – LS, LT (3.6L Bi-Fuel DOHC PZEV)

Visit our homepage and search your Year/Make/Model to confirm fitment.

Fuel Injector Part # Interchange

Lifetime Warranty

Buy with confidence: Every injector includes a lifetime warranty and an unbeatable 60-day hassle-free return period. No RMA. No restocking fees. No stress.