Brands Vehicles
Lowest Prices
Free Returns
Online Since 2009

ACDelco 21686 Radiator

ACDelco 21686 Radiator Image 1
ACDelco 21686 Radiator Image 2
ACDelco 21686 Radiator Image 3
ACDelco 21686 Radiator Image 4
ACDelco 21686 Radiator Image 5
ACDelco 21686 Radiator Image 6
ACDelco 21686 Radiator Image 7
ACDelco 21686 Radiator Image 8
ACDelco 21686 Radiator

ACDelco
Brand:ACDelco
Part Number: 21686
UPC: 00707773249963
Weight: 27.5 lbs
Condition:New



Availability:
0 in Stock
 OUT OF STOCK

Product Information

Description:

Get the ACDelco 21686 Radiator for your vehicle. Buy now and secure your purchase online!

GM Genuine Parts Radiators are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Radiators are heat exchangers, typically located in the front of the vehicle where air can flow through the fins and dissipate heat. Modern radiators are made from aluminum and plastic, while older vehicles used copper and brass. These radiators are designed to be corrosion resistant with optimal heat transfer characteristics. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). ⚠ WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov

Features and Benefits:

  • Corrosion-resistant aluminum designed core helps optimize the radiators long lasting service life
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
  • GM regularly updates production and service part designs to integrate new materials and technologies
  • Lightweight; the radiators have a positive heat transfer to weight ratio
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)

Specifications:

Core Height:
592.1 mm
Core Material:
Aluminum
Core Row Quantity:
2
Core Thickness:
54.5 mm
Down Flow Or Cross Flow Type:
Cross Flow
Height (in):
8.38 in
Inlet Diameter:
46.2 mm
Inlet Header Length:
46.2 mm
Integral Transmission Oil Cooler:
Yes
Length (in):
46.5 in
Mounting Type:
Brackets
Outlet Diameter:
51.51 mm
Outlet Location:
Lower Right
Programming Required:
No
Tank Material:
Plastic
Transmission Oil Cooler Included:
No
Weight (lb):
27.5 lb
Width (in):
34.62 in
Country of Origin:
US

Select a vehicle to narrow ACDelco 21686 Radiator fitment info!

Last Updated: 03/01/2024

Years Vehicle Per Vehicle Fit NotesFitment Notes
Chevrolet Silverado 2500 HD

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LMM
8th VIN Digit: 6
Mfr Code: 1000
 

Chevrolet Silverado 2500 HD



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LMM
8th VIN Digit: 6
Mfr Code: 1000

1 Per Vehicle
Chevrolet Silverado 2500 HD

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000
 

Chevrolet Silverado 2500 HD



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000

1 Per Vehicle
Chevrolet Silverado 2500 HD

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LLY
8th VIN Digit: 2
Mfr Code: 1000
 

Chevrolet Silverado 2500 HD



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LLY
8th VIN Digit: 2
Mfr Code: 1000

1 Per Vehicle
Chevrolet Silverado 2500 HD Classic

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000
 

Chevrolet Silverado 2500 HD Classic



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000

1 Per Vehicle
Chevrolet Silverado 3500

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000
 

Chevrolet Silverado 3500



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000

1 Per Vehicle
Chevrolet Silverado 3500

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LLY
8th VIN Digit: 2
Mfr Code: 1000
 

Chevrolet Silverado 3500



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LLY
8th VIN Digit: 2
Mfr Code: 1000

1 Per Vehicle
Chevrolet Silverado 3500 Classic

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000
 

Chevrolet Silverado 3500 Classic



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000

1 Per Vehicle
Chevrolet Silverado 3500 HD

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LMM
8th VIN Digit: 6
Mfr Code: 1000
 

Chevrolet Silverado 3500 HD



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LMM
8th VIN Digit: 6
Mfr Code: 1000

1 Per Vehicle
GMC Sierra 2500 HD

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LMM
8th VIN Digit: 6
Mfr Code: 1000
 

GMC Sierra 2500 HD



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LMM
8th VIN Digit: 6
Mfr Code: 1000

1 Per Vehicle
GMC Sierra 2500 HD

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000
 

GMC Sierra 2500 HD



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000

1 Per Vehicle
GMC Sierra 2500 HD

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LLY
8th VIN Digit: 2
Mfr Code: 1000
 

GMC Sierra 2500 HD



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LLY
8th VIN Digit: 2
Mfr Code: 1000

1 Per Vehicle
GMC Sierra 2500 HD Classic

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000
 

GMC Sierra 2500 HD Classic



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000

1 Per Vehicle
GMC Sierra 3500

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000
 

GMC Sierra 3500



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000

1 Per Vehicle
GMC Sierra 3500

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LLY
8th VIN Digit: 2
Mfr Code: 1000
 

GMC Sierra 3500



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LLY
8th VIN Digit: 2
Mfr Code: 1000

1 Per Vehicle
GMC Sierra 3500 Classic

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000
 

GMC Sierra 3500 Classic



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LBZ
8th VIN Digit: D
Mfr Code: 1000

1 Per Vehicle
GMC Sierra 3500 HD

6.6L V8 Diesel OHV Turbo
1
 
CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LMM
8th VIN Digit: 6
Mfr Code: 1000
 

GMC Sierra 3500 HD



6.6L V8 Diesel OHV Turbo CORE SIZE 34 15/16 X 23 5/16 X 2 3/16
Eng: LMM
8th VIN Digit: 6
Mfr Code: 1000

1 Per Vehicle