CTS-V Accessory Drive System w/ A/C


  • All-inclusive system
  • Direct bolt-on for LS3 and LS7 engines
  • Fits all LS type engines except production iron block applications
  • Not for LS9 and LSA supercharged engines

Available on backorder

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SKU: 19421420 Categories: ,

CTS-V Accessory Drive System with A/C

Replaces P/N 19370820

  • Does not work on LS9 and LSA supercharged engines
  • Most harmonic balancers do not line up correctly with the accessory drive system; damper P/N 12674582 is strongly recommended
  • Air conditioning has separate belt; to delete air conditioning, do not install the belt, compressor or tensioner
  • Fits all LS type engines, except production iron block applications
  • Direct bolt-on for LS3 and LS7 engines

This system includes:

  • 12578548 (1) Bracket–Air Conditioning
  • 19130461 (1) Compressor–Air Conditioning
  • 12595289 (1) Tensioner–Air Conditioning Belt
  • 12578549 (1) Belt–Air Conditioning Compressor
  • 12578551 (1) Bracket–Power Steering Pump
  • 21997867 (1) Pump–Power Steering
  • 12578552 (1) Pulley–Power Steering Pump
  • 21997866 (1) Reservoir–Power Steering Fluid
  • 21997868 (1) Hose–Power Steering Fluid Reservoir With Clamps
  • 12578550 (1) Bracket–Generator
  • 84009383 (1) Alternator
  • 12568996 (1) Pulley–Belt Idler
  • 12569301 (1) Tensioner–Drive Belt
  • 12578553 (1) Belt–Water Pump/Generator/ Power Steering
  • 11515768 (6) Bolt, Transaxle Br
  • 11516360 (4) Bolt – 10 x 1.50 x 90mm
  • 11588751 (3) Bolt – Hvy HX Acorn Flg Hd
  • 11588744 (2) Bolt – Hvy HX Acorn Flg Hd
  • 11518075 (3) Bolt – Hex Flg HD
  • 11588747 (3) Bolt, Gen
  • 11515760 (2) Bolt Hvy Hex Flg

Note: Will not work with a cam-phased engine. Will not work on LS327 with cast iron block. Water pump P/N 12681186 NOT included with kit. Includes fixed displacement compressor. Use P/N 19299069 for A/C add-on if Variable Displacement Compressor is needed.



19155066, 19370820

CTS-V Accessory Drive System with A/C

19421420 Chevrolet Accessory Drive

Fixed Displacement Compressor

The easiest and most convenient way to finish your LS engine and get it ready to run in your vehicle is with a Chevrolet Performance serpentine accessory drive system. They include the accessories, brackets, drive belts and hardware your engine needs, saving you the time of sourcing them individually. They’re all-inclusive systems that bolt right onto the engine for a factory fit and appearance.

Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to