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FlowKooler pumps patented impeller design helps stop engines from overheating and reduces engine temperature up to 30 degrees by doubling the flow of coolant and building sysyem pressure.

Home / Products / 1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump

1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump

$149.00

1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump
1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump
1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump
1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump
1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump
1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump
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1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump

$149.00

6.5L diesels run a little warmer but if your seeing hi temps and you're at slow sped or under a load then you may need more coolant flow and balanced circulation. 

Flowkooler designed a high flow water pump 1677-HO for these conditions.  It has a CNC machined billet impeller with increased vane count and a reduced casting-to-impeller vane clearance.  It achieves greater flow rates, higher head pressure and a more balanced and efficient flow. The impeller color is due to Type II Class II military grade surface coating which protects against corrosive fluids. 

FlowKooler introduced the first hi flow pumps and continues to improve impeller design. Why is increased flow so important to cooling a hot Chevy diesel engine? Because it has been proven time and time again that reducing the cycle time between the heat source and the heat sink creates more opportunities to shed heat and drop engine temperatures.

From 0-3,300 RPM…Nothing Beats a FlowKooler!

General Specifications:
Type of Material of Pump Body Cast Iron
Number of Blades on Impeller 10 CNC Aluminum
Direction of Rotation CCW
Fan Hub  threaded
Hose Connections: 1st 2nd
Gender F F
Diameter 3/4" 11 o'clock NA
Threaded No  NA
Other Special Features:
  • CNC Machined Aluminum impeller with 10 vanes
  • Protected with a Type II Military grade anodized surface coating
  • 1999-2004 6.5L Diesel with screw on shaft
  • This has one hose connection and space to drill and tap a second
  • Corresponds with parts 12456231, 12555711, 12555752, 12569281, 19168609, 50745093, 5745093, 88894035
Parts Contained in Box:

Mounting Gaskets, Installation Sheet, FlowKooler Decal
Make Model Year CID Liters
AM GENERAL HUMMER 1999-2001 395 6.5L
CHEVROLET C1500 SUBURBAN 1999 395 6.5L
CHEVROLET C2500 1999-2000 395 6.5L
CHEVROLET C2500 SUBURBAN 1999 395 6.5L
CHEVROLET C3500 1998-2000 395 6.5L
CHEVROLET C3500HD 1999-2002 395 6.5L
CHEVROLET EXPRESS 2500 1999-2002 395 6.5L
CHEVROLET EXPRESS 3500 1999-2002 395 6.5L
CHEVROLET K1500 SUBURBAN 1999 395 6.5L
CHEVROLET K2500 1999-2000 395 6.5L
CHEVROLET K2500 SUBURBAN 1999 395 6.5L
CHEVROLET K3500 1999-2000 395 6.5L
CHEVROLET P30 1999 395 6.5L
GENERAL MOTORS Medium &amp; Heavy Duty; V8, (6.5L) 395 Diesel ALL 395  
GMC C1500 SUBURBAN 1999 395 6.5L
GMC C2500 1999-2000 395 6.5L
GMC C2500 SUBURBAN 1999 395 6.5L
GMC C3500 1999-2000 395 6.5L
GMC C3500HD 1999-2002 395 6.5L
GMC K1500 SUBURBAN 1999 395 6.5L
GMC K2500 1999-2000 395 6.5L
GMC K2500 SUBURBAN 1999 395 6.5L
GMC K3500 1999-2000 395 6.5L
GMC P3500 1999 395 6.5L
GMC SAVANA 2500 1999-2000 395 6.5L
GMC SAVANA 3500 1999-2000 395 6.5L
HUMMER H1 2002-2004 395 6.5L
WORKHORSE FASTRACK FT1801 2002-2005 395 6.5L
WORKHORSE FASTRACK FT1802 2002-2003 395 6.5L
WORKHORSE P32 1999-2003 395 6.5L
WORKHORSE P42 1999-2005 395 6.5L
WORKHORSE W42 2004 395 6.5L

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1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump
1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump
1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump
1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump
1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump
1677-HO 1999-2004 Chevy GMC 2002-2004 AM Gen 6.5L Diesel CCW screw-on-shaft water pump