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Select your vehicle
Vehicle Info Required to Guarantee FitAdd Vehicle

AC Delco®
131-120 GM Original Equipment Series Thermostat

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$42.88Save: $25.39(59%)
Manufacturer #131-120
Vehicle Info Required to Guarantee FitAdd Vehicle


Quantity Sold:
Sold individually
24-months or unlimited mile AC Delco limited warranty
Prop 65 Warning:

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Stainless Steel
Opening Temperature Rating:
91 degrees C
Recommended Use:
OE Replacement
GM Original Equipment Series

Vehicle Fitment Information

Vehicle Name
Fitment Information
1998 Buick Regal
25th Anniversary Edition
6 Cyl 3.8L
1998 Oldsmobile Intrigue
6 Cyl 3.8L
1998 Oldsmobile Regency
6 Cyl 3.8L
1998-1999 Buick Riviera
6 Cyl 3.8L
1998-1999 Chevrolet Lumina
6 Cyl 3.8L
Page 1 of 11 | Showing 1 - 5 of 54 results

Product Information


The factory-original fit and lasting function of ACDelco’s OE replacement thermostats provide the perfect repair without breaking your budget. Established in 1899, ACDelco manufactures original GM parts and premium OE replacement parts for other brands in the automotive aftermarket.

  • High-grade design delivers extended lifespan
  • Carefully formed to suit your specific vehicle
  • Engineered to exact OE standards
  • Has undergone stringent evaluation to guarantee proper fit and performance
Need help?Call our product expert1-866-529-0412
Chat with us
Mondays - Sundays7am - 11pm ET | 4am - 8pm PT
Warranty Policy
Right parts, guaranteed. If you find any defects, let us know within 60 days and we’ll take care of it. Check out our Warranty Policy for more details.
Shipping Policy
We ship fast so you can get on the road that much faster. Check out our Shipping Policy for more details.
Easy Return Policy
We’re only happy if you’re happy. If you’re not entirely satisfied with your order, you may be entitled to a refund. Check out our Return Policy for more details.

Product Q&A

Does this come with the Gasket?Justin N.Mar 13, 2022
Best Answer:Hi Justin, I'm glad to assist you. The seal is at the base already around the sides. This should be plug-and-play once you receive it. Grab our sale price offer and click the link below to order today. I hope this helps. Happy shopping. <a href="https://www.carparts.com/thermostat/ac-delco/ac131120?can=CPJE1043_20220313" target="_blank">https://www.carparts.com/thermostat/ac-delco/ac131120?can=CPJE1043_20220313</a>
Jeonino E.STAFFMar 13, 2022
Does this part come with gaskets a the other things that are needed to install?  Sorry if dumb question I am a grandmaw and I don’t knowPenny B.Mar 11, 2024
Best Answer:Hi Penny, I'm glad to assist you. Yes, it does. Click on the link below for direct ordering to take advantage of our ongoing discount and limited stocks. I hope this helps, and happy shopping. <a href="https://www.carparts.com/thermostat/ac-delco/ac131120?can=CPAE1047_CSQA_20240311" target="_blank">https://www.carparts.com/thermostat/ac-delco/ac131120?can=CPAE1047_CSQA_20240311</a>
Arnel E.STAFFMar 11, 2024
What temp do I need 2 buy ?Bruce M.Feb 21, 2021
Best Answer:Hi Bruce, Please check your vehicle manual for the thermostat recommendations. I also recommend reaching out to your local dealership, parts department. They may be able to help.
Aldrin P.STAFFFeb 21, 2021
does it come with gasket?A shopperSep 18, 2020
Best Answer:Hi, The gasket is not included, it is sold separately.
Grace G.STAFFSep 18, 2020

Customer Reviews

Works great and install was easy
Logan M.
Purchased on Feb 14, 2024
Awesome!! Thanks
Fewcell D.
Purchased on Feb 19, 2024
Fit perfect and great price!!! You can't beat <a href="http://carparts.com" target="_blank">carparts.com</a> anywhere!!! Highly recommend!!!!!😁 Ships super fast too!
David F.
Purchased on Oct 23, 2022