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#4650858 - 01/30/18 08:05 AM 02 Chevy Silverado 5.3L heater hoses
Gito Offline


Registered: 08/30/09
Posts: 650
Loc: CA
Own a 2002 Chevy Silverado 5.3L (LT) with 345k and need to replace the heater hoses that come off the firewall and travel into the water pump housing area.

Trying to get the part numbers for these two hoses. Called the dealer and they gave me some parts numbers (15792821 and 15763368).
The dealer used my vin but when I try to populate the hoses suing the GMpartcenter website, the part shows a different hose and it shows that it doesn't fit my car. So either the dealer gave me the wrong part number or I wrote the part number incorrectly.


Vin# ends with 21132497

Any advice is greatly appreciated

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#4650869 - 01/30/18 08:21 AM Re: 02 Chevy Silverado 5.3L heater hoses [Re: Gito]
46Harry Offline


Registered: 01/08/12
Posts: 414
Loc: hawthorne, Ca.
I would recommend buying the hoses from the dealer as you are reasonably assured of getting the correct parts the first time. The dealer will be more expensive, but how often to the hoses get replaced?

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#4650870 - 01/30/18 08:22 AM Re: 02 Chevy Silverado 5.3L heater hoses [Re: Gito]
Lubener Offline


Registered: 01/22/11
Posts: 2669
Loc: N.Ohio
Are they molded or straight? If you go to Gates web site, they list all your hoses.


Edited by Lubener (01/30/18 08:26 AM)
_________________________
The "thinking" man's friend.

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#4650871 - 01/30/18 08:25 AM Re: 02 Chevy Silverado 5.3L heater hoses [Re: Gito]
Snagglefoot Offline


Registered: 12/31/17
Posts: 2058
Loc: SE British Columbia, Canada
345,000 miles? Tell us a bit about your motor oil. ( and + 1 on 46Harry’s comments).

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#4650874 - 01/30/18 08:37 AM Re: 02 Chevy Silverado 5.3L heater hoses [Re: Snagglefoot]
krismoriah72 Offline


Registered: 02/16/09
Posts: 1578
Loc: wv
Rock Auto lists AC Delco, Gates, Dayco and Continental molded hoses for your application.

If you dont like to order online just get the Gates numbers and take them to NAPA.

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#4650906 - 01/30/18 09:01 AM Re: 02 Chevy Silverado 5.3L heater hoses [Re: Gito]
Rhymingmechanic Offline


Registered: 08/13/04
Posts: 1347
Loc: VA
I did this on a 2001 5.3 Silverado with Gates hoses, 18914 and 22554.

I also planned to replace the plastic quick-connect fittings at the firewall with Dorman #800-409. I don't know if the originals are different sizes or one of my new parts was faulty, but I could only get one of the new connectors to fit. After most of an afternoon, I gave up and reused one original. I got a little plastic tool from NAPA to remove the fittings.

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#4650931 - 01/30/18 09:23 AM Re: 02 Chevy Silverado 5.3L heater hoses [Re: Rhymingmechanic]
Rat407 Offline


Registered: 12/13/02
Posts: 1550
Loc: North Carolina
Originally Posted By: Rhymingmechanic
I did this on a 2001 5.3 Silverado with Gates hoses, 18914 and 22554.

I also planned to replace the plastic quick-connect fittings at the firewall with Dorman #800-409. I don't know if the originals are different sizes or one of my new parts was faulty, but I could only get one of the new connectors to fit. After most of an afternoon, I gave up and reused one original. I got a little plastic tool from NAPA to remove the fittings.


I replaced mine on my 02 Silverado and got the hoses from Rock Auto. All fit just fine and I also replace the plastic quick connect fittings. I basically changed all my hoses at one time.
_________________________
2002 Silverado 5.3 0w-20 AMSOIL®

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#4650967 - 01/30/18 09:57 AM Re: 02 Chevy Silverado 5.3L heater hoses [Re: Snagglefoot]
Gito Offline


Registered: 08/30/09
Posts: 650
Loc: CA
Originally Posted By: Snagglefoot
345,000 miles? Tell us a bit about your motor oil. ( and + 1 on 46Harry’s comments).


Have used Valvoline and Castrol 5w-30 for most of its life. Religiously changed the oil every 3k. Replaced or repaired everything myself. This forum has helped me when I had to tackle something I had never done. Since I replaced the intake manifold the cold misfires when away. Going thru some slow start issues now where it might be pointing towards a new starter. Extremely reliable trucks. We are the original owners and the engine is original meaning it hasn't been opened up.

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#4651142 - 01/30/18 12:54 PM Re: 02 Chevy Silverado 5.3L heater hoses [Re: Gito]
Kibitoshin Offline


Registered: 04/19/16
Posts: 720
Loc: Oahu, HI
The WP to heater core hose is just a straight piece of 5/8" heater hose.
The heater core return Y reservoir to water pump can be bought at NAPA which are made by Gates.

You will need new quick disconnect fittings for both the new hoses. I used Dorman QD fittings which is no different than any other black plastic fitting.
_________________________
Shin Gekiretsu Shin'ou'hou
01 Toyota Tundra 2WD V8 4.7L - 170k mi
02 Chevy Silverado C1500 V8 5.3L 154k mi

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#4651223 - 01/30/18 02:30 PM Re: 02 Chevy Silverado 5.3L heater hoses [Re: Kibitoshin]
Gito Offline


Registered: 08/30/09
Posts: 650
Loc: CA
Originally Posted By: Kibitoshin
The WP to heater core hose is just a straight piece of 5/8" heater hose.
The heater core return Y reservoir to water pump can be bought at NAPA which are made by Gates.

You will need new quick disconnect fittings for both the new hoses. I used Dorman QD fittings which is no different than any other black plastic fitting.


Do the dealer hoses come with the quick disconnect fittings?

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#4651386 - 01/30/18 04:30 PM Re: 02 Chevy Silverado 5.3L heater hoses [Re: Gito]
Kibitoshin Offline


Registered: 04/19/16
Posts: 720
Loc: Oahu, HI
Originally Posted By: Gito
Originally Posted By: Kibitoshin
The WP to heater core hose is just a straight piece of 5/8" heater hose.
The heater core return Y reservoir to water pump can be bought at NAPA which are made by Gates.

You will need new quick disconnect fittings for both the new hoses. I used Dorman QD fittings which is no different than any other black plastic fitting.


Do the dealer hoses come with the quick disconnect fittings?


Haven't checked the dealer when I bought my heater hoses since NAPA carried Gates which are the OEM supplier. Googling the 2 part numbers in the first post shows the dealer parts having the QD fittings.

This is what I did with the NAPA Gates hoses. Hoses don't come preinstalled with the fittings so they need to be bought separately.


Bought everything from NAPA:
_________________________
Shin Gekiretsu Shin'ou'hou
01 Toyota Tundra 2WD V8 4.7L - 170k mi
02 Chevy Silverado C1500 V8 5.3L 154k mi

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#4651985 - 01/31/18 11:26 AM Re: 02 Chevy Silverado 5.3L heater hoses [Re: Kibitoshin]
GMBoy Offline


Registered: 11/22/04
Posts: 7725
Loc: Texas
Originally Posted By: Kibitoshin
Originally Posted By: Gito
Originally Posted By: Kibitoshin
The WP to heater core hose is just a straight piece of 5/8" heater hose.
The heater core return Y reservoir to water pump can be bought at NAPA which are made by Gates.

You will need new quick disconnect fittings for both the new hoses. I used Dorman QD fittings which is no different than any other black plastic fitting.


Do the dealer hoses come with the quick disconnect fittings?


Haven't checked the dealer when I bought my heater hoses since NAPA carried Gates which are the OEM supplier. Googling the 2 part numbers in the first post shows the dealer parts having the QD fittings.

This is what I did with the NAPA Gates hoses. Hoses don't come preinstalled with the fittings so they need to be bought separately.


Bought everything from NAPA:



Exactly what I just did last month on my 2006 Sierra Denali. One of the firewall connectors was weeping so it was time and I did both hoses and new Quick connects. All from Rock Auto.

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#4652666 - 01/31/18 09:42 PM Re: 02 Chevy Silverado 5.3L heater hoses [Re: Gito]
01rangerxl Offline


Registered: 04/08/06
Posts: 9271
Loc: Birmingham, AL
I meant to look up your truck with the catalog at work today but forgot. The part numbers your local dealer gave you look like typical heater hoses for that truck though based on Google image results.

What is the link to the website?
_________________________
2002 Ford Ranger XLT | 3.0 V6 / 5-Speed Automatic / 2WD | 216K miles
1994 Ford Ranger STX | 4.0 V6 / 5-Speed Manual / 4X4 | 199K miles

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#4652735 - 01/31/18 11:01 PM Re: 02 Chevy Silverado 5.3L heater hoses [Re: Gito]
barkingspider Offline


Registered: 12/22/13
Posts: 2077
Loc: socal
I replaced these hoses on my Escalade. I got oem from a local GM dealer. Later I checked a local pep boys and they had the Gates brand for significantly less expensive. Oh well, no use in crying over spilled milk. The plastic connectors are separate
_________________________
06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)

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#4652765 - 01/31/18 11:46 PM Re: 02 Chevy Silverado 5.3L heater hoses [Re: Gito]
2strokeNorthstar Offline


Registered: 07/19/17
Posts: 303
Loc: PR CA, USA
Lucky. My BMW 328i heater hose blew @ about 150k.

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