Holstein 2CTS0187 Engine Coolant Temperature Sensor

Brand	Holstein 2CTS0187
Product line	Holstein Parts
Fits	Buick, Cadillac, Chevrolet, and GMC · 141 vehicles

Engine coolant sensor. Monitors coolant temperature for accurate engine management.

Cross-references 12636534 and 12656444 for the same application. See all 2.

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Engine Coolant Temperature Sensor for GM Applications

Holstein Parts 2CTS0187 is an engine coolant temperature sensor for select Cadillac, Chevrolet, Buick, and GMC vehicles. It provides direct fitment coverage across multiple GM platforms, including applications on the water pump and near-engine locations where specified.

Key Features

Engine coolant temperature sensor for monitoring coolant temperature in the engine cooling system
Fits select 2013-2026 Cadillac, Chevrolet, Buick, and GMC models
Application-specific coverage for locations such as water pump and near-engine mounting points
Cross-references OE part numbers 12636534 and 12656444
Holstein Parts 2CTS0187 for direct replacement use

Detailed Description

Holstein Parts 2CTS0187 is an engine coolant temperature sensor built for a wide range of GM vehicles, including Chevrolet Camaro, Malibu, Colorado, Equinox, Impala, Traverse, and Blazer; Cadillac ATS, CTS, CT6, CT4, and XTS; plus Buick and GMC applications. This sensor supports accurate coolant temperature reporting to the engine control system, helping maintain proper cooling-system operation and engine management. The Holstein Parts line focuses on application-specific replacement parts, and this part number is listed for multiple OE-style interchange references.

This part cross-references OE numbers 12636534 and 12656444 for the same application.

What It Helps Address

Incorrect coolant temperature readings
Illuminated engine warning lights related to temperature sensing
Cooling system control issues tied to faulty sensor input
Hard starting or drivability concerns caused by inaccurate engine temperature data
Temperature-related diagnostic trouble codes

Installation Notes and Tips

Verify the exact year, make, model, and engine configuration before ordering.
Check the listed notes for placement details such as on the water pump or near engine.
Inspect the connector style and terminal configuration on vehicles with plated connector or gold terminal pin notes.
Confirm the original part number and compare it to 2CTS0187 before installation.

Quality Assurance

Holstein Parts 2CTS0187 is cataloged as an OE-referenced replacement sensor for the listed GM applications, with fitment coverage spanning 2013-2026 across Cadillac, Chevrolet, Buick, and GMC models.

This part fits 141 vehicles

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

Year	Make	Model	Body Type	Drive Type	Transmission	Liters	Cylinders	Fuel Type	Notes
2026	Cadillac	CT4	—	—	—	3.6L	V6	—	Holstein Parts
2025	Cadillac	CT4	Sedan	—	—	3.6L	V6	—	Holstein Parts
2024	Cadillac	CT4	—	—	—	3.6L	V6	—	Holstein Parts
2023	Cadillac	CT4	—	—	—	3.6L	V6	—	Holstein Parts
2023	Chevrolet	Camaro	—	—	—	2.0L	L4	—	Holstein Parts
2022	Cadillac	CT4	—	—	—	3.6L	V6	—	Holstein Parts
2022	Chevrolet	Camaro	—	—	—	2.0L	L4	—	Holstein Parts
2022	Chevrolet	Colorado	—	—	—	2.5L	L4	—	Located on Water Pump; Holstein Parts
2022	Chevrolet	Malibu	—	—	—	2.0L	L4	—	Holstein Parts
2022	GMC	Canyon	—	—	—	2.5L	L4	—	Located on Water Pump; Holstein Parts
2021	Chevrolet	Blazer	—	—	—	2.5L	L4	—	Holstein Parts
2021	Chevrolet	Camaro	—	—	—	2.0L	L4	—	Holstein Parts
2021	Chevrolet	Colorado	—	—	—	2.5L	L4	—	Located on Water Pump; Holstein Parts
2021	Chevrolet	Malibu	—	—	—	2.0L	L4	—	Holstein Parts
2021	GMC	Acadia	—	—	—	2.5L	L4	—	Holstein Parts
2021	GMC	Canyon	—	—	—	2.5L	L4	—	Located on Water Pump; Holstein Parts
2020	Buick	Envision	—	AWD	—	2.5L	L4	—	Holstein Parts
2020	Buick	Envision	—	FWD	—	2.5L	L4	—	Holstein Parts
2020	Buick	Envision	—	AWD	—	2.0L	L4	—	Transmission Auto 9 Spd, 9T60, Gen 1 [M3T] \| Chassis All Wheel Drive W/Transfer Case [F46] \| Engine Control Stop/Start Sys [Kl9]; Holstein Parts
2020	Buick	Regal Sportback	—	—	—	2.0L	L4	—	Holstein Parts
2020	Buick	Regal TourX	—	—	—	2.0L	L4	—	Holstein Parts
2020	Chevrolet	Blazer	—	AWD	—	2.5L	L4	—	Transmission Auto 9 Spd, 9T50 Gen 1 [M3D]; Holstein Parts
2020	Chevrolet	Blazer	—	FWD	—	2.5L	L4	—	Transmission Auto 9 Spd, 9T50 Gen 1 [M3D]; Holstein Parts
2020	Chevrolet	Camaro	—	—	—	2.0L	L4	—	Holstein Parts
2020	Chevrolet	Colorado	Extended Cab Pickup	4WD	Automatic	2.5L	L4	—	On Water Pump; Transmission Auto 6 Spd, Hmd, 6L-50 [Myb]; Holstein Parts
2020	Chevrolet	Colorado	Extended Cab Pickup	RWD	Automatic	2.5L	L4	—	On Water Pump; Transmission Auto 6 Spd, Hmd, 6L-50 [Myb]; Holstein Parts
2020	Chevrolet	Colorado	Crew Cab Pickup	RWD	Automatic	2.5L	L4	—	On Water Pump; Transmission Auto 6 Spd, Hmd, 6L-50 [Myb]; Holstein Parts
2020	Chevrolet	Colorado	Crew Cab Pickup	4WD	Automatic	2.5L	L4	—	On Water Pump; Transmission Auto 6 Spd, Hmd, 6L-50 [Myb]; Holstein Parts
2020	Chevrolet	Equinox	—	FWD	Automatic	2.0L	L4	—	Transmission Auto 9 Spd, 9T50 Gen 1 [M3D]; Holstein Parts
2020	Chevrolet	Malibu	—	—	—	2.0L	L4	—	Transmission Auto, 9 Spd, 9T50, Gen 1, Var 1 [M3E] \| Evaporative System Level 3 Emissions [Ne8] \| Emission System Federal, Tier 3 [Ntb] \| Emission System California, Ulev70 [Nub]; Holstein Parts
2020	GMC	Acadia	—	FWD	—	2.5L	L4	—	Transmission Auto 9 Spd, 9T50, Etrs Gen 1 [M3H]; Holstein Parts
2020	GMC	Canyon	Extended Cab Pickup	RWD	Automatic	2.5L	L4	—	On Water Pump; Transmission Auto 6 Spd, Hmd, 6L-50 [Myb]; Holstein Parts
2020	GMC	Canyon	Extended Cab Pickup	4WD	Automatic	2.5L	L4	—	On Water Pump; Transmission Auto 6 Spd, Hmd, 6L-50 [Myb]; Holstein Parts
2020	GMC	Canyon	Crew Cab Pickup	4WD	Automatic	2.5L	L4	—	Except Denali; On Water Pump; Transmission Auto 6 Spd, Hmd, 6L-50 [Myb]; Holstein Parts
2020	GMC	Canyon	Crew Cab Pickup	RWD	Automatic	2.5L	L4	—	Except Denali; On Water Pump; Transmission Auto 6 Spd, Hmd, 6L-50 [Myb]; Holstein Parts
2020	GMC	Terrain	—	FWD	—	2.0L	L4	—	Engine Control Stop/Start Sys [Kl9]; Holstein Parts
2019	Buick	Cascada	—	—	—	1.6L	L4	—	Holstein Parts
2019	Buick	Envision	—	—	—	2.0L	L4	—	Holstein Parts
2019	Buick	Envision	—	—	—	2.5L	L4	—	Holstein Parts
2019	Buick	LaCrosse	—	—	—	2.5L	L4	—	For Combustion Engine; Holstein Parts
2019	Buick	Regal Sportback	—	—	—	2.0L	L4	—	Holstein Parts
2019	Buick	Regal TourX	—	—	—	2.0L	L4	—	Holstein Parts
2019	Cadillac	ATS	—	—	—	2.0L	L4	—	Holstein Parts
2019	Cadillac	CTS	—	—	—	2.0L	L4	—	Holstein Parts
2019	Cadillac	XTS	—	—	—	3.6L	V6	—	Holstein Parts
2019	Chevrolet	Blazer	—	—	—	2.5L	L4	—	Holstein Parts
2019	Chevrolet	Camaro	—	—	—	2.0L	L4	—	Holstein Parts
2019	Chevrolet	Colorado	—	—	—	2.5L	L4	—	Near Engine; Holstein Parts
2019	Chevrolet	Equinox	—	—	—	2.0L	L4	—	Holstein Parts
2019	Chevrolet	Impala	—	—	—	2.5L	L4	—	Holstein Parts
2019	Chevrolet	Malibu	—	—	—	2.0L	L4	—	Holstein Parts
2019	Chevrolet	Traverse	—	—	—	2.0L	L4	—	Holstein Parts
2019	GMC	Acadia	—	—	—	2.5L	L4	—	Holstein Parts
2019	GMC	Canyon	—	—	—	2.5L	L4	—	Near Engine; Holstein Parts
2019	GMC	Terrain	—	—	—	2.0L	L4	—	Holstein Parts
2018	Buick	Cascada	—	—	—	1.6L	L4	—	W/ Gold Terminal Pins; Holstein Parts
2018	Buick	Envision	—	—	—	2.0L	L4	—	Holstein Parts
2018	Buick	Envision	—	—	—	2.5L	L4	—	Holstein Parts
2018	Buick	LaCrosse	—	—	—	2.5L	L4	—	W/ Plated Connector; Holstein Parts
2018	Buick	Regal Sportback	—	—	—	2.0L	L4	—	Holstein Parts
2018	Buick	Regal TourX	—	—	—	2.0L	L4	—	Holstein Parts
2018	Cadillac	ATS	—	—	—	2.0L	L4	—	Holstein Parts
2018	Cadillac	CT6	—	—	—	2.0L	L4	GAS	Holstein Parts
2018	Cadillac	CT6	—	—	—	2.0L	L4	ELECTRIC/GAS	W/ Plated Connector; Holstein Parts
2018	Cadillac	CTS	—	—	—	2.0L	L4	—	Holstein Parts
2018	Cadillac	XTS	—	—	—	—	—	—	Holstein Parts
2018	Chevrolet	Camaro	—	—	—	2.0L	L4	—	Holstein Parts
2018	Chevrolet	Colorado	—	—	—	2.5L	L4	—	W/ Plated Connector; Holstein Parts
2018	Chevrolet	Equinox	—	—	—	2.0L	L4	—	Holstein Parts
2018	Chevrolet	Impala	—	—	—	2.5L	L4	—	Holstein Parts
2018	Chevrolet	Malibu	—	—	—	2.0L	L4	—	Holstein Parts
2018	Chevrolet	Malibu	—	—	—	1.8L	L4	—	W/O Threads; W/ Plated Connector; Holstein Parts
2018	Chevrolet	Traverse	—	—	—	2.0L	L4	—	Holstein Parts
2018	GMC	Acadia	—	—	—	2.5L	L4	—	Holstein Parts
2018	GMC	Canyon	—	—	—	2.5L	L4	—	W/ Plated Connector; Holstein Parts
2018	GMC	Terrain	—	—	—	2.0L	L4	—	Holstein Parts
2017	Buick	Cascada	—	—	—	1.6L	L4	—	W/ Gold Terminal Pins; Holstein Parts
2017	Buick	Envision	—	—	—	2.0L	L4	—	Holstein Parts
2017	Buick	Envision	—	—	—	2.5L	L4	—	Holstein Parts
2017	Buick	Regal	—	—	—	2.0L	L4	—	Holstein Parts
2017	Cadillac	ATS	—	—	—	3.6L	V6	—	Holstein Parts
2017	Cadillac	ATS	—	—	—	2.5L	L4	—	W/ Gold Terminal Pins; Holstein Parts
2017	Cadillac	ATS	—	—	—	2.0L	L4	—	Holstein Parts
2017	Cadillac	CT6	—	—	—	2.0L	L4	—	Holstein Parts
2017	Cadillac	CTS	—	—	—	2.0L	L4	—	Holstein Parts
2017	Cadillac	CTS	—	—	—	3.6L	V6	—	Holstein Parts
2017	Cadillac	XTS	—	—	—	3.6L	V6	—	Holstein Parts
2017	Chevrolet	Camaro	—	—	—	2.0L	L4	—	Holstein Parts
2017	Chevrolet	Colorado	—	—	—	2.5L	L4	—	Holstein Parts
2017	Chevrolet	Impala	—	—	—	2.5L	L4	—	Holstein Parts
2017	Chevrolet	Malibu	—	—	—	1.8L	L4	—	Holstein Parts
2017	Chevrolet	Malibu	—	—	—	2.0L	L4	—	Holstein Parts
2017	Chevrolet	S10	—	—	—	2.5L	L4	—	Holstein Parts
2017	GMC	Acadia	—	—	—	2.5L	L4	—	Holstein Parts
2017	GMC	Canyon	—	—	—	2.5L	L4	—	Holstein Parts
2016	Buick	Cascada	—	—	—	1.6L	L4	—	Holstein Parts
2016	Buick	Envision	—	—	—	2.0L	L4	—	Holstein Parts
2016	Buick	Regal	—	—	—	2.0L	L4	—	Holstein Parts
2016	Cadillac	ATS	—	—	—	3.6L	V6	—	Holstein Parts
2016	Cadillac	ATS	—	—	—	2.0L	L4	—	Holstein Parts
2016	Cadillac	ATS	—	—	—	2.5L	L4	—	Holstein Parts
2016	Cadillac	CT6	—	—	—	2.0L	L4	—	Holstein Parts
2016	Cadillac	CTS	—	—	—	3.6L	V6	—	Holstein Parts
2016	Cadillac	CTS	—	—	—	2.0L	L4	—	Holstein Parts
2016	Cadillac	XTS	—	—	—	3.6L	V6	—	Holstein Parts
2016	Chevrolet	Camaro	—	—	Automatic	2.0L	L4	—	Holstein Parts
2016	Chevrolet	Colorado	—	—	Automatic	2.5L	L4	—	Holstein Parts
2016	Chevrolet	Colorado	—	—	Manual	2.5L	L4	—	Holstein Parts
2016	Chevrolet	Impala	—	—	—	2.5L	L4	—	Holstein Parts
2016	Chevrolet	Malibu	—	—	—	1.8L	L4	—	Holstein Parts
2016	Chevrolet	Malibu	—	—	—	2.0L	L4	—	Holstein Parts
2016	Chevrolet	Malibu Limited	—	—	—	2.5L	L4	—	Holstein Parts
2016	Chevrolet	S10	—	—	—	2.5L	L4	—	Holstein Parts
2016	GMC	Canyon	—	—	—	2.5L	L4	—	Holstein Parts
2015	Buick	Regal	—	—	—	2.0L	L4	—	Holstein Parts
2015	Cadillac	ATS	—	—	—	2.0L	L4	—	Holstein Parts
2015	Cadillac	ATS	—	—	—	2.5L	L4	—	Holstein Parts
2015	Cadillac	CTS	—	—	—	3.6L	V6	—	Holstein Parts
2015	Cadillac	CTS	—	—	—	2.0L	L4	—	Holstein Parts
2015	Cadillac	XTS	—	—	—	3.6L	V6	—	Holstein Parts
2015	Chevrolet	Colorado	—	—	Automatic	2.5L	L4	—	Holstein Parts
2015	Chevrolet	Colorado	—	—	Manual	2.5L	L4	—	Holstein Parts
2015	Chevrolet	Colorado	—	—	—	2.5L	L4	—	Holstein Parts
2015	Chevrolet	Impala	—	—	—	2.5L	L4	—	Holstein Parts
2015	Chevrolet	Malibu	—	—	—	2.0L	L4	—	Holstein Parts
2015	Chevrolet	Malibu	—	—	—	2.5L	L4	—	Holstein Parts
2015	GMC	Canyon	—	—	Manual	2.5L	L4	—	Holstein Parts
2015	GMC	Canyon	—	—	Automatic	2.5L	L4	—	Holstein Parts
2014	Buick	Regal	—	—	—	2.0L	L4	—	Holstein Parts
2014	Cadillac	ATS	—	—	—	2.0L	L4	—	Holstein Parts
2014	Cadillac	ATS	—	—	—	2.5L	L4	—	Holstein Parts
2014	Cadillac	CTS	—	—	—	3.6L	V6	—	Holstein Parts
2014	Cadillac	CTS	—	—	—	2.0L	L4	—	Holstein Parts
2014	Cadillac	XTS	—	—	—	3.6L	V6	—	Holstein Parts
2014	Chevrolet	Impala	—	—	—	2.5L	L4	—	Holstein Parts
2014	Chevrolet	Malibu	—	—	—	2.0L	L4	—	Holstein Parts
2014	Chevrolet	Malibu	—	—	—	2.5L	L4	—	Holstein Parts
2013	Cadillac	ATS	—	—	—	2.5L	L4	—	Holstein Parts
2013	Cadillac	ATS	—	—	—	2.0L	L4	—	Holstein Parts
2013	Chevrolet	Malibu	—	—	—	2.0L	L4	—	Holstein Parts
2013	Chevrolet	Malibu	—	—	—	2.5L	L4	—	Holstein Parts
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Directly replaces or cross-references 2 part numbers

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

1263653412656444