How to replace the thermostat in a 4.3L engine on GMC Sonoma?

The replacement process for the 4.3l engine Thermostat begins when you drain part of the cooling system. Start by removing the outlet duct from the air cleaner before unscrewing all throttle body bracket nuts to relocate the bracket. The procedure starts by discarding the lower Intake Manifold water outlet housing mounting bolts before separating this housing from the manifold to set it safely aside. First clean both sealing surfaces of the water outlet housing and lower Intake Manifold before you put the new gasket or o-ring and Thermostat into place. All installation parts require complete cleaning to avoid leakage between sealing surfaces. Attach the Thermostat with either a new gasket or o-ring before connecting the water outlet housing to the lower Intake Manifold using the directions in fastener notice in service precautions. Fasten water outlet housing mounting bolts to 19 nm (14 ft. Lbs.) before reattaching the throttle body bracket which requires bracket nuts to be tightened to 10 nm (89 inch lbs.). Before you finish you must fill the cooling system while inspecting it for leakages.

OEM GMC Sonoma Thermostat

Engine Coolant Thermostat

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

7 Thermostats found

View related parts
GMC Sonoma Thermostat Unit Part Number: 24505924
$24.47 MSRP: $48.56
You Save: $24.09 (50%)
ADD TO CART
Product Specifications
- Other Name: Thermostat Assembly-Engine Coolant (W/Gasket); Thermostat; Thermostat, Engine Coolant Temperature
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 GMC Sonoma | SL, SLE, SLS | 6 Cyl 4.3 L GAS
View related parts
GMC Sonoma Thermostat Part Number: 12632948
$29.83 MSRP: $56.02
You Save: $26.19 (47%)
ADD TO CART
Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
- Replaces: 12257859, 12563335, 12557859, 12597583, 12551472
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2004 GMC Sonoma | SL, SLE, SLS | 6 Cyl 4.3 L GAS
View related parts
GMC Sonoma Thermostat Part Number: 10190925
$14.60 MSRP: $27.42
You Save: $12.82 (47%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
- Replaces: 10147886, 10190927
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 GMC Sonoma | SL, SLE, SLS | 6 Cyl 4.3 L GAS
View related parts
GMC Sonoma Thermostat Unit Part Number: 24506986
$18.12 MSRP: $34.02
You Save: $15.90 (47%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature; Thermostat
- Replaces: 03037747, 10207375, 3037747, 24500253
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1995 GMC Sonoma | SL, SLE, SLS | 6 Cyl 4.3 L GAS
View related parts
GMC Sonoma Thermostat Part Number: 10207373
$11.27 MSRP: $20.12
You Save: $8.85 (44%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1992-1993 GMC Sonoma | Base, SLE, SLS | 4 Cyl 2.5 L GAS, 6 Cyl 4.3 L GAS
View related parts
GMC Sonoma Intake Manifold Part Number: 24577299
$16.76 MSRP: $29.91
You Save: $13.15 (44%)
Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature; Thermostat Unit; Thermostat
- Replaces: 24576634, 10182377, 24577130
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1992-2003 GMC Sonoma | Base, SL, SLE, SLS | 4 Cyl 2.2 L FLEX, 4 Cyl 2.2 L GAS, 6 Cyl 2.8 L GAS
View related parts
GMC Sonoma Thermostat Housing Part Number: 12511714
$43.38 MSRP: $77.46
You Save: $34.08 (44%)
Product Specifications
- Other Name: Housing, Engine Coolant Thermostat; Thermostat Housing Cover
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1992-1993 GMC Sonoma | Base, SLE, SLS | 4 Cyl 2.5 L GAS

GMC Sonoma Thermostat

Want to cut long-term maintenance and repair costs? Choose OEM Thermostat. Those parts deliver top durability you can trust. On our site, you'll find a huge catalog of genuine GMC Sonoma parts. Prices are unbeatable, so you can keep more in your pocket. Every OEM GMC Sonoma Thermostat includes a manufacturer's warranty. You can also get an easy return policy that keeps buying risk free. Fast delivery, get your car on the road quickly. It's simple to search, compare, and order. Stop guessing about quality or fit. Order today and save with parts that last.

Thermostat is also applied in GMC Sonoma automobiles to control the engine temperature for the optimal experience of the vehicle. Usually placed close to the radiator, it normally acts as a closed loop control related to a desired setpoint temperature. Through the years there are several types of Thermostat that has been utilized; the mechanical Thermostat such as bimetallic strips and wax pellets the pneumatic Thermostat that makes use of air-filled control tubes. These Thermostats operate through switching on or off heating or cooling equipment or through the control of heat transfer liquids which helps in proper control of temperature and improvement in the performance in a number of applications.

GMC Sonoma Thermostat Parts Questions & Experts Answers

Thermostat
12632948
Q: How to replace the thermostat in a 4.3L engine on GMC Sonoma?
A:
The replacement process for the 4.3l engine Thermostat begins when you drain part of the cooling system. Start by removing the outlet duct from the air cleaner before unscrewing all throttle body bracket nuts to relocate the bracket. The procedure starts by discarding the lower Intake Manifold water outlet housing mounting bolts before separating this housing from the manifold to set it safely aside. First clean both sealing surfaces of the water outlet housing and lower Intake Manifold before you put the new gasket or o-ring and Thermostat into place. All installation parts require complete cleaning to avoid leakage between sealing surfaces. Attach the Thermostat with either a new gasket or o-ring before connecting the water outlet housing to the lower Intake Manifold using the directions in fastener notice in service precautions. Fasten water outlet housing mounting bolts to 19 nm (14 ft. Lbs.) before reattaching the throttle body bracket which requires bracket nuts to be tightened to 10 nm (89 inch lbs.). Before you finish you must fill the cooling system while inspecting it for leakages.