Auto Trans Kickdown Solenoid Switch for 1988-1990 Chevrolet C1500 & More - Standard Ignition SZ-1

Help your automatic transmission deliver its forced downshift on demand with the Standard Ignition Transmission Kick-Down Solenoid Switch, part number SZ-1. It is listed for many models, among them the 1988-1990 Chevrolet C1500, the 1988-1990 Chevrolet K1500 and the 1973-1979 Chevrolet Impala.

This switch is part of the transmission's kickdown circuit. When the accelerator is pressed toward full throttle, it signals the kickdown solenoid so the automatic transmission can make a forced downshift for passing or merging. It is a direct-fit replacement for the listed applications. See the Buyer's Guide tab for the full vehicle list and engine details.

• Quality control from start to finish: Standard is a global manufacturer of original equipment ignition products and maintains complete quality control across the manufacturing process, from componentry to finished product.
• Built for technicians: Backed by decades of industry-leading research and development aimed at what technicians need.
• Industrial-grade materials: Professional construction gives today's professionals what they need to get the job done right.
• Engineered around known failures: Where the original equipment fails, this switch is designed to address those inherent failure issues.

Signs the kickdown switch may need replacing include a transmission that won't downshift when you floor the accelerator, or a kickdown that works only some of the time. Wiring or the solenoid itself can cause the same symptoms, so diagnose the circuit before replacing the switch.

Interchange: S636 · TKS1 · TKS100 · 8623788 · 8626974 · 8629207 · 8629935