Standard Ignition TS-621 cold advance coolant temperature switch for the 1988-1993 Chevrolet C1500 V6 4.3L, V8 5.0L, 5.7L or 6.2L, the 1990-1993 C1500 V8 7.4L and other vehicles closes an electrical contact once the coolant reaches a set temperature.
- Factory-calibrated to make electrical contact at the specified lower-temperature set point
- Every unit tested to confirm switch actuation at its specified temperature
- Two male blade terminals on a round, male plug-in connector
- Bolt-on attachment with a bronze metal finish
Quick facts
- Part: Standard Ignition TS-621 cold advance coolant temperature switch
- Also called: cold advance solenoid engine coolant temperature switch
- Fits: the 1988-1993 Chevrolet C1500 V6 4.3L, V8 5.0L, 5.7L or 6.2L, the 1990-1993 C1500 V8 7.4L and other vehicles
- Condition: New
A cold engine that idles or runs poorly can have several causes, so find the cause before replacing this switch. With the engine off and cool, check the connector and terminals for corrosion and the switch body for cracks or coolant seepage. A shop can test its electrical operation. Some catalogs list it as a cold advance solenoid engine coolant temperature switch.
Fits
This switch is listed for a wide range of Chevrolet and GMC models, including the 1988-1993 Chevrolet K1500 V6 4.3L, V8 5.0L, 5.7L or 6.2L and the 1988-1993 GMC C2500 V6 4.3L, V8 5.0L, 5.7L or 6.2L, the 1991-1993 C2500 V8 7.4L and the 1992-1993 C2500 V8 6.5L. If your vehicle is not named here, find it by year and engine in the "Vehicles it fits" section. Each engine takes one switch, and this listing is one switch.
Specifications
Fit and size
- Quantity per vehicle: 1
- Terminal quantity: 2
- Connector quantity: 1
- Attachment method: Bolt on
Build and materials
- Terminal type: Blade, male
- Connector: Round, male, plug-in
- Finish: Metal, bronze
- Condition: New
- Country of origin: Taiwan
Interchange: WT7266 · SU15057 · TS7265 · 10154649
This part cross-references / interchanges with the following part numbers:
WT7266, SU15057, TS7265, 10154649
Frequently Asked Questions
Is the Standard Ignition TS-621 right for a 1988-1993 Chevrolet K1500 V8 5.0L?
Yes. Standard Ignition TS-621 is listed for the 1988-1993 Chevrolet K1500 V6 4.3L, V8 5.0L, 5.7L and 6.2L. Other trucks are in the "Vehicles it fits" section.
How many terminals does the TS-621 coolant temperature switch have?
Two male blade terminals, on one round, male plug-in connector.
Does this cold advance switch bolt on or thread in?
It has a bolt-on attachment method, and the wiring connects through a plug-in connector.
Does the Standard Ignition TS-621 replace switch WT7266?
Yes. WT7266 is one of the numbers this Standard Ignition TS-621 replaces, along with SU15057, TS7265 and 10154649.
How is this switch checked for the temperature it actuates at?
Each unit is calibrated at the factory for a specified lower-temperature set point, then tested to confirm it actuates at that temperature.
