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  2. Auto Parts
  3. Belts and Cooling
  4. Thermostat and Housing
  5. Engine Coolant Thermostat
  6. ACDelco 12T99D

ACDelco 12T99D Engine Coolant Thermostat

ACDelco 12T99D Engine Coolant Thermostat

ACDelco
Brand:ACDelco
Part Number: 12T99D
UPC: 00707773061992
Weight: 0.15 lbs
Condition:New



Availability:
0 in Stock
 OUT OF STOCK

Product Information

Description:

Get the ACDelco 12T99D Engine Coolant Thermostat for your vehicle. Buy now and secure your purchase online!

ACDelco Professional Engine Coolant Thermostats control the flow of coolant through your vehicle's radiator to help the engine reach and maintain its optimal operating temperature, and are a high quality replacement for many vehicles on the road today. These engine coolant thermostats are manufactured to meet your expectations for fit, form, and function. WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov

Features and Benefits:

  • Controls the flow of coolant through the radiator to help your vehicle's engine reach and maintain its optimal operating temperature
  • Manufactured to meet expectations for fit, form, and function
  • Professional, premium aftermarket replacement
  • Provides the performance and dependability you expect from ACDelco
  • – Have cooling system inspected immediately if instrument panel-mounted temperature gauge indicates engine overheating

Specifications:

Height:
3.2 in.
Jiggle Pin Weep Hole:
No
Length:
3.5 in.
Programming Required:
NO
Seal Type:
Gasket
Sealing Flange Outside Diameter:
2.047 in.
Weight:
.15 lb
Width:
3.2 in.

Manufacturer Warranty:

24 Months/Unlimited Miles Warranty (Parts Only). Please see ACDelco.com for more details

Select a vehicle to narrow ACDelco 12T99D Engine Coolant Thermostat fitment info!

Last Updated: 05/29/2022

Years Vehicle Per Vehicle Position Fit NotesFitment Notes

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 
Chevrolet C4500 Kodiak

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

Chevrolet C4500 Kodiak



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2003

 

2003

 
Chevrolet C4500 Kodiak

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
Front
 

Chevrolet C4500 Kodiak



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
Front

1 Per Vehicle

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 
Chevrolet C5500 Kodiak

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

Chevrolet C5500 Kodiak



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 
Chevrolet Express 2500

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

Chevrolet Express 2500



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 
Chevrolet Express 3500

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

Chevrolet Express 3500



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 
Chevrolet Express 4500

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

Chevrolet Express 4500



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2020

 

2019

 

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2020

 

2019

 

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 
Chevrolet Silverado 2500 HD

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

Chevrolet Silverado 2500 HD



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2007

 

2007

 
Chevrolet Silverado 2500 HD Classic

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

Chevrolet Silverado 2500 HD Classic



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 
Chevrolet Silverado 3500

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

Chevrolet Silverado 3500



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2007

 

2007

 
Chevrolet Silverado 3500 Classic

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

Chevrolet Silverado 3500 Classic



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2020

 

2019

 

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2020

 

2019

 

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 
Chevrolet Silverado 3500 HD

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

Chevrolet Silverado 3500 HD



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 
GMC C4500 Topkick

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

GMC C4500 Topkick



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 
GMC C5500 Topkick

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

GMC C5500 Topkick



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 
GMC Savana 2500

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

GMC Savana 2500



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 
GMC Savana 3500

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

GMC Savana 3500



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 
GMC Savana 4500

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

GMC Savana 4500



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2020

 

2019

 

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2020

 

2019

 

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 
GMC Sierra 2500 HD

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

GMC Sierra 2500 HD



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2007

 

2007

 
GMC Sierra 2500 HD Classic

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

GMC Sierra 2500 HD Classic



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 
GMC Sierra 3500

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

GMC Sierra 3500



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2007

 

2007

 
GMC Sierra 3500 Classic

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

GMC Sierra 3500 Classic



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2020

 

2019

 

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2020

 

2019

 

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 
GMC Sierra 3500 HD

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

GMC Sierra 3500 HD



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2006

 

2006

 
Hummer H1

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

Hummer H1



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 

2005

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 

2005

 
Workhorse LF72

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

Workhorse LF72



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2005

 

2005

 
Workhorse Custom Chassis P42

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

Workhorse Custom Chassis P42



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle

2007

 

2007

 
Workhorse Custom Chassis W72

6.6L V8 Diesel OHV Turbo
1
 
Front
 
Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal
 

Workhorse Custom Chassis W72



6.6L V8 Diesel OHV Turbo

Front Professional
Temperature 185F
Standard
OEM Recommended Temp
Includes seal

1 Per Vehicle