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Dorman® Engine Coolant Crossover Pipe for 2003 GMC Sierra 3500
PartNumber: 626-543Product Specifications- Height: 2.91 in
- Inside Diameter: 0.2 in
- Length: 10.5 in
- OE Part Number: 12604711, 12559091
- Outside Diameter: 0.29 in
- Package Contents: Coolant Bypass Tube
- UPC: 885484375048
- Width: 0.8 in
- Part Description: 2003 GMC Sierra 3500 Engine Coolant Crossover Pipe
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
$50.74
Gates® Safety Stripe Hvac Heater Hose for 2003 GMC Sierra 3500
PartNumber: 28411Product Specifications- Notes: Cut to Length, 31";Cut to Length, 33"
- Centerline Length: 50 ft
- End 1 Inside Diameter: .625 in
- End 2 Inside Diameter: .625 in
- Material: EPDM
- OE Part Number: 8990
- UPC: 072053066319
- Weight Per Length: 11.70 lbs./Carton
- Working Pressure: 60 PSI
- Part Description: 2003 GMC Sierra 3500 Safety Stripe Hvac Heater Hose
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 8.1L
$55.34
Dorman® Hvac Heater Hose Assembly for 2003 GMC Sierra 3500
PartNumber: 626-110Product Specifications- Notes: Outlet; Heater Hose; wo/Ambulance Prep Pkg; Code 8212; Code 9598
- Color: Natural
- Coolant Hose Heat Shield Included: No Heat Shield Required
- Coolant Hose Length: 29.5"
- Coolant Hose Material: Aluminum and Rubber
- Coolant Hose Protective Sleeve Included: No Protective Sleeve Required
- Coolant Hose Type: Single I.D. (Inside Diameter)
- End 1 Attachment Type: Barbed
- End 2 Attachment Type: Quick Disconnect
- Hose End (1) Inside Diameter (In): 0.5"
- Hose End (1) Outside Diameter (In): 0.63"
- Hose End (2) Inside Diameter (In): 0.75"
- Hose End (2) Outside Diameter (In): 0.85"
- Maximum Working Pressure (psi): 100
- OE Part Number: 15768212
- Package Contents: Heater Hose Assembly
- SAE Standards: J20
- Thermostatically Controlled: No
- UPC: 019495426998
- With Clamps: No
- Part Description: 2003 GMC Sierra 3500 Hvac Heater Hose Assembly
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
$37.22
Gates® Safety Stripe Hvac Heater Hose for 2003 GMC Sierra 3500
PartNumber: 28409Product Specifications- Notes: Cut to Length, 5";Cut to Length, 4";Cut to Length, 9"
- Centerline Length: 50 ft
- End 1 Inside Diameter: 10 mm
- End 2 Inside Diameter: .375 in
- Material: EPDM
- OE Part Number: 8899
- UPC: 072053081183
- Weight Per Length: 8.25 lbs./Carton
- Working Pressure: 60 PSI
- Part Description: 2003 GMC Sierra 3500 Safety Stripe Hvac Heater Hose
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
$44.06
Dorman® Hvac Heater Hose Assembly for 2003 GMC Sierra 3500
PartNumber: 626-557Product Specifications- Notes: wo/Auxiliary Heater
- Branch Quantity: 2
- Color/Finish: Natural/No Finish
- Contains Spring: No
- Coolant Hose Heat Shield Included: No Heat Shield Required
- Coolant Hose Length: 34"
- Coolant Hose Material: Rubber
- Coolant Hose Protective Sleeve Included: Not Required
- Coolant Hose Type: Single I.D. (Inside Diameter)
- End 1 Attachment Type: Hose
- End 2 Attachment Type: Quick Disconnect
- Grade Type: Standard
- Hose End (1) Inside Diameter (In): 0.99"
- Hose End (1) Outside Diameter (In): 1.33"
- Hose End (2) Inside Diameter (In): 1.33"
- Hose End (2) Outside Diameter (In): 0.62 In.
- Hose End (3) Inside Diameter (In): 0.9"
- Hose Shape: Straight
- Maximum Working Pressure (psi): 100 PSI
- OE Part Number: 15763368
- Package Contents: Heater Hose Assembly
- Thermostatically Controlled: No
- UPC: 885484595286
- With Clamps: No
- Part Description: 2003 GMC Sierra 3500 Hvac Heater Hose Assembly
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
$29.55
Gates® Hvac Heater Molded Hose for 2003 GMC Sierra 3500
PartNumber: 18622Product Specifications- Centerline Length (in): 23"
- Inside Diameter 1 (in): 0.48"
- Number of Branches: 0
- UPC: 770075563112
- Part Description: 2003 GMC Sierra 3500 Hvac Heater Molded Hose
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 8.1L
$31.71
Gates® Hvac Heater Molded Hose for 2003 GMC Sierra 3500
PartNumber: 18969Product Specifications- Notes: W/O Ambulance Prep. Pkg; Cut to fit;W/Ambulance Prep. Pkg; Cut to fit
- Centerline Length (in): 20.8"
- Inside Diameter 1 (in): 0.62"
- Number of Branches: 0
- UPC: 072053411485
- Part Description: 2003 GMC Sierra 3500 Hvac Heater Molded Hose
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
$15.83
Gates® Hvac Heater Molded Hose for 2003 GMC Sierra 3500
PartNumber: 19102Product Specifications- Notes: W/O Ambulance Prep. Pkg; Cut to fit;W/Ambulance Prep. Pkg; Cut to fit
- Centerline Length (in): 16.4"
- Inside Diameter 1 (in): 0.62"
- Inside Diameter 2 (in): 0.75"
- Number of Branches: 0
- UPC: 072053466171
- Part Description: 2003 GMC Sierra 3500 Hvac Heater Molded Hose
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
$15.55
Gates® Engine Coolant Reservoir Hose for 2003 GMC Sierra 3500
PartNumber: 18468Product Specifications- Centerline Length (in): 18.7"
- Inside Diameter 1 (in): 0.5"
- Number of Branches: 0
- UPC: 072053558463
- Part Description: 2003 GMC Sierra 3500 Engine Coolant Reservoir Hose
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
$15.13
Gates® Engine Coolant Molded Bypass Hose for 2003 GMC Sierra 3500
PartNumber: 19802Product Specifications- Branch Quantity: 0
- Centerline Length (in): 5.1
- Centerline Length (mm): 130
- End 1 Inside Diameter: 0.87 in
- End 2 Inside Diameter: 1 in
- Material: EPDM
- Molded: Yes
- Number of Quick Connect Fittings: 0
- OE Part Number: 31781
- UPC: 072053549836
- Part Description: 2003 GMC Sierra 3500 Engine Coolant Molded Bypass Hose
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 8.1L
$10.10
Gates® Hvac Heater Molded Hose for 2003 GMC Sierra 3500
PartNumber: 18623Product Specifications- Branch Quantity: 0
- Centerline Length: 4.83 in
- End 1 Inside Diameter: 6 mm
- End 2 Inside Diameter: 6 mm
- Material: EPDM
- OE Part Number: 74074
- UPC: 770075566731
- Part Description: 2003 GMC Sierra 3500 Hvac Heater Molded Hose
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
$5.51
Dayco® 4 5 Molded Heater Hose for 2003 GMC Sierra 3500
PartNumber: 86504Product Specifications- Notes: Molded
- Color: Black
- Contains Heat Shield: N
- Contains Protective Sleeve: N
- End 1 Inside Diameter: 1/4
- End 1 Outside Diameter: 17/32
- End 2 Inside Diameter: 1/4
- End 2 Outside Diameter: 17/32
- Hose Type: Single I.D. Hose
- Material: EPDM
- SAE Specification: SAE J20R3 Class D-1, SAE J1684 Type EC
- Trunk Height: 4 1/2
- UPC: 036687843739
- Part Description: 2003 GMC Sierra 3500 4 5 Molded Heater Hose
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
$4.90
Dayco® Small Id Hvac Heater Hose for 2003 GMC Sierra 3500
PartNumber: 86836Product Specifications- Color: Black
- Contains Heat Shield: N
- Contains Protective Sleeve: N
- End 1 Inside Diameter: 1/4
- End 1 Outside Diameter: 17/32
- End 2 Inside Diameter: 9/32
- End 2 Outside Diameter: 17/32
- Hose Type: Single I.D. Hose
- Material: EPDM
- SAE Specification: SAE J20R3 Class D-1, SAE J1684 Type EC
- Trunk Height: 29 1/2
- UPC: 036687882226
- Part Description: 2003 GMC Sierra 3500 Small Id Hvac Heater Hose
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
$16.43
Dayco® Small Id Hvac Heater Hose for 2003 GMC Sierra 3500
PartNumber: 87959Product Specifications- Notes: Branched
- Color: Black
- Contains Heat Shield: N
- Contains Protective Sleeve: N
- End 1 Inside Diameter: 3/4
- End 1 Outside Diameter: 1 1/16
- End 2 Inside Diameter: 1
- End 2 Outside Diameter: 1 11/32
- End 3 Inside Diameter: 3/4
- End 3 Outside Diameter: 3/4
- Hose Type: Branched Hose
- Material: EPDM
- SAE Specification: SAE J20R3 Class D-1, SAE J1684 Type EC
- Trunk Height: 15 1/2
- UPC: 036687889225
- Part Description: 2003 GMC Sierra 3500 Small Id Hvac Heater Hose
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
$34.45
Dayco® Small Id Branched Heater Hose for 2003 GMC Sierra 3500
PartNumber: 88412Product Specifications- Notes: Branched
- Color: Black
- Contains Heat Shield: N
- Contains Protective Sleeve: N
- End 1 Inside Diameter: 23/32
- End 1 Outside Diameter: 1 1/16
- End 2 Inside Diameter: 1
- End 2 Outside Diameter: 1 11/32
- End 3 Inside Diameter: 19/32
- End 3 Outside Diameter: 1
- Hose Type: Branched Hose
- Material: EPDM
- SAE Specification: SAE J20R3 Class D-1, SAE J1684 Type EC
- Trunk Height: 12
- UPC: 036687145383
- Part Description: 2003 GMC Sierra 3500 Small Id Branched Heater Hose
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
$32.81
Dayco® Small Id Hvac Heater Hose for 2003 GMC Sierra 3500
PartNumber: 88445Product Specifications- Color: Black
- Contains Heat Shield: N
- Contains Protective Sleeve: N
- End 1 Inside Diameter: 7/8
- End 1 Outside Diameter: 1 5/16
- End 2 Inside Diameter: 1
- End 2 Outside Diameter: 1 13/32
- Hose Type: Dual I.D. Hose
- Material: EPDM
- SAE Specification: SAE J20R3 Class D-1, SAE J1684 Type EC
- Trunk Height: 4 1/2
- UPC: 036687696212
- Part Description: 2003 GMC Sierra 3500 Small Id Hvac Heater Hose
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 8.1L
$8.92
Gates® Engine Coolant Molded Bypass Hose for 2003 GMC Sierra 3500
PartNumber: 18126Product Specifications- Branch Quantity: 0
- Centerline Length: 35.78 in
- End 1 Inside Diameter: 6 mm
- End 2 Inside Diameter: .3 in
- Material: EPDM
- OE Part Number: 31125
- UPC: 072053559125
- Part Description: 2003 GMC Sierra 3500 Engine Coolant Molded Bypass Hose
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
$19.93
FAQ for Heater Hose Repair
Q: How to remove the heater outlet hose?
A:
You can drain the cooling system, remove the air intake tube, and the heater and surge tank hose from the mounting clip, disconnect the heater hose from the heater core outlet, remove the outlet heater hose from the engine, and the outlet heater hose.
By Bob
GM Specialist
01/11/2022Q: How to remove the heater hose?
A:
You can drain the cooling system, remove the air intake tube, the heater and the surge tank hose from the mounting clip, disconnect the heater hose from the heater core inlet, remove the inlet heater hose from the engine, and the inlet heater hose.
By Bob
GM Specialist
01/11/2022Q: How to install the heater hose?
A:
You can install the inlet heater hose, the inlet heater hose to the engine, connect the heater and surge tank hose to the heater core, install the heater and surge tank hose to the mounting clip, and the air intake tube, and fill the cooling system.
By Bob
GM Specialist
01/11/2022Q: How to install the heater outlet hose?
A:
You can install the outlet heater hose, the outlet heater hose to the engine, connect the outlet heater hose to the heater core, install the heater and surge tank hose to the mounting clip, and the air intake tube, and fill the cooling system.
By Bob
GM Specialist
01/11/2022