Transfer Case Vacuum Switch for Chevrolet S10 Blazer, GMC Sonoma Jimmy S15, for Oldsmobile Bravada 4WD 4x4 Replacement

Transfer Case Vacuum Switch for Chevy S10 Blazer GMC Sonoma Olds Bravada 4WD 4x4 This new transfer case switch is a high quality, value priced, aftermarket replacement part. If defective, your shift light will not indicate 4WD when shifted to 4WD. Why search through junk yards hoping to find a used 4x4 vacuum switch when you can have it brand new! Replace that defective transfer case switch now. Specifications Vacuum operated Replaces dealer part number: 15664811 Direct bolt on Fits 4 wheel drive trucks Built to strict quality control standards Note: If you have any questions about this fitting your application, please call your local GM dealer with the above part number. This 4x4 GM vacuum switch has substantial cost savings over a dealer unit. Lifetime Warranty This item is backed by our limited lifetime warranty. In the event this item should fail due to manufacturing defects during intended use, we will service. This warranty covers the cost of the part only. Returns: Parts with electrical components cannot be returned once installed. Fits: 1995-00 for Chevrolet Blazer Transfer Case Vacuum Switch 1983-94 for Chevrolet Blazer S10 Transfer Case Vacuum Switch 1983-00 for Chevrolet S10 Pickup Transfer Case Vacuum Switch 1992-00 GMC Jimmy Transfer Case Vacuum Switch 1983-91 GMC Jimmy S-15 Transfer Case Vacuum Switch 1983-90 GMC S-15 Pickup Transfer Case Vacuum Switch 1991-00 GMC S-15 Sonoma Transfer Case Vacuum Switch 1991-00 Olds Bravada Transfer Case Vacuum Switch

• Direct OEM replacement for GM part number 15664811 — designed for precise fit and function without modification.
• Vacuum-operated design ensures accurate 4WD engagement signaling and reliable transfer case actuation under real-world driving conditions.
• Built to stringent quality control standards using durable materials resistant to underhood heat, vibration, and moisture exposure.
• Restores proper operation of the 4WD shift indicator light — helps eliminate confusion when switching between 2WD and 4WD modes.
• Backed by a limited lifetime warranty covering manufacturing defects — part-only coverage with easy claim process for qualified failures.