Make sure this part fits

GMC 24577299 Engine Coolant Thermostat

1986-2003 GMC

Customer Questions & Expert Answers (2)
24577299 GM Engine Coolant Thermostat Product Photo 1 of 4
  • Part Description
    THERMOSTAT, Engine Coolant Temperature
  • Replaces
    24576634, 10182377, 24577130
  • Manufacturer
    General Motors
Make sure this part fits
$17.05 MSRP: $29.91
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Currently Unavailable

Due to manufacturer supply shortage, this item isn't currently available for ordering.

  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine GMC
    Manufacturer Part Number24577299
    Part DescriptionTHERMOSTAT, Engine Coolant Temperature
    Other NamesIntake Manifold, Thermostat, Thermostat Unit
    Item Dimensions3.2 x 2.2 x 2.1 inches
    Item Weight0.50 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces24576634, 10182377, 24577130
    ManufacturerGeneral Motors
    SKU24577299
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    1991-1995 GMC C1500C1500 EXTENDED CAB LONG BOX, C1500 EXTENDED CAB STANDARD BOX, C1500 REGULAR CAB LONG BOX, C1500 REGULAR CAB STANDARD BOX
    1991-1995 GMC C25008 Cyl 7.4LC2500 EXTENDED CAB LONG BOX, C2500 EXTENDED CAB STANDARD BOX, C2500 REGULAR CAB
    1991-1995 GMC C35008 Cyl 7.4LC3500 CAB CHASSIS 135.5, C3500 CAB CHASSIS 159.9, C3500 CAB CHASSIS 183.5, C3500 CREW CAB LONG WHEELBASE, C3500 EXTENDED CAB, C3500 REGULAR CAB
    1990-1991 GMC G15001/2 TON CARGO, 1/2 TON PASSENGER
    1990-1991 GMC G25003/4 TON CARGO, 3/4 TON PASSENGER
    1990-1996 GMC G35008 Cyl 7.4L1 TON CARGO, 1 TON CARGO CLASSIC, 1 TON CARGO VAN, 1 TON COMMERCIAL/RECREATIONAL VEHICLE, 1 TON COMMERCIAL/RV CLASSIC, 1 TON PASSENGER, 1 TON PASSENGER CLASSIC
    1990-1993 GMC Jimmy1/2 TON, 2 DOOR, 4 DOOR
    1991-1995 GMC K1500K1500 EXTENDED CAB LONG BOX, K1500 EXTENDED CAB STANDARD BOX, K1500 REGULAR CAB LONG BOX, K1500 REGULAR CAB STANDARD BOX
    1991-1995 GMC K25008 Cyl 7.4LK2500 EXTENDED CAB LONG BOX, K2500 EXTENDED CAB STANDARD BOX, K2500 REGULAR CAB
    1991-1995 GMC K35008 Cyl 7.4LK3500 CAB CHASSIS 135.5, K3500 CAB CHASSIS 159.9, K3500 CREW CAB LONG WHEELBASE, K3500 EXTENDED CAB, K3500 REGULAR CAB
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  • Customer Questions & Expert Answers

    Q:
    I would like to confirm if this is the correct part number for my vehicle. Please advise. Thank you.
    A:
    You can Select Your Vehicle to check if 24577299 fits your vehicle.
    Posted and answered by GM Parts Specialist Henry
    Q:
    What is the method for testing the operation of a Thermostat on Oldsmobile Cutlass? Posted by Tricia G.
    A:
    To check a thermostat, submerge the thermostat in water 25 degrees above its stamped temperature, usually 220 degrees for most GM engines. The valve should be fully open, then place it in water 10 degrees below the stamped temperature, typically 185 degrees, where the valve should close. If the thermostat functions correctly, reinstall it.
    You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Fernando / Mar 05, 2025

Genuine GM Part 24577299, the Right Choice

To ensure reliability, purchase GM part # 24577299 Engine Coolant Thermostat. It is sometimes referred to as GMC Thermostat. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific GMC C2500, Suburban, Yukon models.

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