HomeEngine > Valve Train ComponentsStandard Ignition VVT637 Engine Variable Valve Timing (VVT) Sprocket - Exhaust
Part #: VVT637

Standard Ignition VVT637 Engine Variable Valve Timing (VVT) Sprocket - Exhaust

Exhaust
⚙️ 15 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$227.44Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Buick and Cadillac, LaCrosse, Rendezvous, CTS, SRX, and STS
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Standard Ignition VVT637 Engine Variable Valve Timing Sprocket

The Standard Ignition VVT637 is an engine variable valve timing sprocket designed to optimize valve timing for improved engine performance. This component is compatible with select Buick and Cadillac models, including the CTS, LaCrosse, Rendezvous, SRX, and STS.

  • Engine variable valve timing sprocket for precise valve control
  • Compatible with Buick CTS, LaCrosse, Rendezvous and Cadillac SRX, STS
  • Part number VVT637 ensures exact fit and function
  • Manufactured to meet OEM specifications for reliable operation
  • Supports efficient engine timing adjustments for better performance

Detailed Product Description

The Standard Ignition VVT637 sprocket plays a critical role in the variable valve timing system by adjusting the timing of the camshaft relative to the crankshaft. This adjustment allows the engine to optimize valve opening and closing events, improving fuel efficiency, emissions, and overall engine responsiveness. Designed specifically for Buick and Cadillac vehicles such as the CTS, LaCrosse, Rendezvous, SRX, and STS, this sprocket meets strict quality standards to ensure durability and precise operation. Using part number VVT637 guarantees compatibility and proper fitment within the engine's valve train components.

Common Applications and Issues Addressed

  • Restores proper variable valve timing function in Buick CTS and LaCrosse engines
  • Resolves timing irregularities causing rough idling or reduced power in Cadillac SRX and STS
  • Eliminates engine hesitation linked to faulty VVT sprocket in Buick Rendezvous
  • Prevents check engine light triggers related to valve timing sensor errors
  • Improves fuel economy by maintaining accurate valve timing adjustments

Installation Notes and Tips

  • Ensure engine is cool before beginning installation to avoid injury
  • Follow manufacturer torque specifications when securing the sprocket
  • Verify timing marks alignment during installation to maintain engine timing accuracy
  • Inspect related components such as timing chain and tensioners for wear
  • Use appropriate tools to prevent damage to the sprocket or surrounding parts

Quality Assurance and Warranty Information

Standard Ignition manufactures the VVT637 sprocket to meet or exceed OEM standards, ensuring reliable performance and longevity. This part undergoes rigorous quality control testing to confirm fit, function, and durability. While specific warranty terms may vary, Standard Ignition typically offers coverage against defects in materials and workmanship, providing confidence in the product's quality for Buick and Cadillac variable valve timing applications.

BrandStandard Ignition
Part NumberVVT637
FunctionsEngine Variable Valve Timing Sprocket

This part fits 15 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2006BuickLaCrosse3.6LV6Exhaust
2006BuickRendezvous3.6LV6Exhaust
2006CadillacCTS3.6LV6Exhaust
2006CadillacCTS2.8LV6Exhaust
2006CadillacSRX3.6LV6Exhaust
2006CadillacSTS3.6LV6Exhaust
2005BuickLaCrosse3.6LV6Exhaust
2005BuickRendezvous3.6LV6Exhaust
2005CadillacCTS3.6LV6Exhaust
2005CadillacCTS2.8LV6Exhaust
2005CadillacSRX3.6LV6Exhaust
2005CadillacSTS3.6LV6Exhaust
2004BuickRendezvous3.6LV6Exhaust
2004CadillacCTS3.6LV6Exhaust
2004CadillacSRX3.6LV6Exhaust

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

12571759125832961258827235-1435916-951ECP1839V40-1256VV5142

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.