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2004 Silverado #5388451 03/29/20 08:29 AM
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mjk Offline OP
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Hi,

A unique opportunity may have just come up, possibly changing my direction in looking at trucks.

Looking for anything from that year (5.3 z71) that may pop out as unusual issues, compared to other years of GM in that era.

I've put on about 110k on my 01 Tahoe, so familiar with the usual - fuel pumps, Intake gaskets, window regulators, maintenance of drivetrain....

Thanks, and stay healthy.

Re: 2004 Silverado [Re: mjk] #5388530 03/29/20 10:17 AM
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Posts: 381
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JohnG Offline
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Was that year included in the transmission issue? I can't remember the article right now, but there IS an issue with some GM trucks around that time. Something to do with the 2 - 3 shift. It seems to me there is a faulty casting or something that just can't be repaired. It's an issue, but not a huge problem until it IS.

Re: 2004 Silverado [Re: mjk] #5388536 03/29/20 10:23 AM
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msmoke00 Offline
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Normal: fuel pumps, transfer case rub through, window regulators, front diff actuators/4x4 switch, broken exhaust studs
Be sure to check the head casting number, the 706 heads had a habit of being porous. As long as rust isn't becoming a problem, they're good trucks that are fairly easy to work on. The pre AFM 5.3L looks better and better every day.

Re: 2004 Silverado [Re: mjk] #5388570 03/29/20 11:10 AM
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mjk Offline OP
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You know, I swore I would never own a GM vehicle again. The bigger items that I replaced on my Tahoe, purchased in 2013 w/ 68k on it, include: fuel pump, intake gaskets, normal cluster rebuild, 2 front bearings.... and 2 window regulators.

Other than that, smaller normal maintenance stuff. I am at 179k, so lower mileage for an 01. In honesty, it has been a reliable vehicle. No transmission issues. Replaced front/rear diff fluid with Amsoil around 75k, along with Tcase.


This 04 truck is kind of an unique situation, I am planning on setting up an appt this week. We will see, I don't jump on vehicles, so nothing ventured/nothing gained.

I will say this is a buyers market right now....

Last edited by mjk; 03/29/20 11:12 AM.
Re: 2004 Silverado [Re: mjk] #5388576 03/29/20 11:19 AM
Joined: Sep 2010
Posts: 12,834
4WD Online Confused
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Hmm … BiL did 400k on a 2002 GMC and only did tires, brakes, and front wheel bearings …
Just ran Mobil Super bulk 5k OCI … and trans service every 50k …
(the Mobil 1 Express would do air filters as needed) …
He has the mechanical skills of a 2nd grader … So really did nothing himself

Re: 2004 Silverado [Re: mjk] #5388777 03/29/20 04:16 PM
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cpayne5 Offline
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The only thing that I haven't seen mentioned here that is a concern with GMT800s is the brakes lines. Pretty common issue.

My advice, if a problem pops up, is to replace all the lines with Ni-Copp or a pre-bent stainless set. I've done both. Dorman, of all companies, actually makes (re-labels?) really good kits for these trucks that are cheap (~$100).

Re: 2004 Silverado [Re: mjk] #5388780 03/29/20 04:25 PM
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01rangerxl Offline
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There's an 04 at work with over 500k on the original 5.3, another at around 400k. Heads have never been off either truck. They have had transmissions replaced, but all with over 300k, one went to 485k. One truck needed a rear end, but again it was in the 300s.

I've bought probably three blend door actuators for the 04 Sierra at work. My boss's personal 04 Silverado (around 400k miles) has been through about six blower motor resistors.

Good trucks overall, they do have their issues which seem to vary from truck to truck, but they are definitely capable of very high mileage and most things are straight forward to repair.


2002 Ford Ranger XLT | 3.0 V6 Auto 2WD | 239K miles
1994 Ford Ranger STX | 4.0 V6 Manual 4X4 | 203K miles
1994 Ford Explorer XLT | 4.0 V6 Auto 4X4 | 256K miles
Re: 2004 Silverado [Re: 01rangerxl] #5388849 03/29/20 06:26 PM
Joined: Sep 2010
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4WD Online Confused
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Never had those blend doors fail … but I tend to leave it split level year round. (probably easier in the south) … maybe that’s a habit that’s working … dunno … might be keeping humidity out of the carpet too

Re: 2004 Silverado [Re: mjk] #5388996 03/29/20 10:04 PM
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clinebarger Offline
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T-case pump rub would be at the top of the list & I would correct that first.


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: 2004 Silverado [Re: mjk] #5391136 04/01/20 05:54 PM
Joined: Nov 2014
Posts: 791
marine65 Offline
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Posts: 791
Originally Posted by mjk
Hi,

A unique opportunity may have just come up, possibly changing my direction in looking at trucks.

Looking for anything from that year (5.3 z71) that may pop out as unusual issues, compared to other years of GM in that era.

I've put on about 110k on my 01 Tahoe, so familiar with the usual - fuel pumps, Intake gaskets, window regulators, maintenance of drivetrain....

Thanks, and stay healthy.


Why you you want to buy another G.M. product when the one you have has given you all that repair work in only 110 K?
I just don't understand the fascination with sub par products.


2018 Hyundai Elantra GT black
2018 Hyundai Elantra GT silver
yup got two of them.
Re: 2004 Silverado [Re: mjk] #5391226 04/01/20 07:17 PM
Joined: Jan 2010
Posts: 540
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super20dan Offline
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I swore I would never buy a gm product either but my 99 silverdo is just too much fun with the first year 5.3 LS engine. most if its issues have been small and typical gm. window regulators-blend doors -switches etc. nothing big in 20 years but has very low miles 87,ooo.


99 silverado 5.3
2003 tundra v6
1981 toyota cressida wagon
2003 kia sorento
04 toyota highlander 4cyl 2013 toyota rav4
Re: 2004 Silverado [Re: mjk] #5391577 04/02/20 07:03 AM
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dwcopple Offline
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Wait till your cats fail...


2017 Acura MDX SH-AWD
2011 Chrysler 200 Limited 3.6L V6
1998 Mustang GT 4.6L V8 convertible
2019 VW Jetta SEL 1.4T
Re: 2004 Silverado [Re: mjk] #5392144 04/02/20 08:09 PM
Joined: Jan 2010
Posts: 540
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super20dan Offline
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no emissions testing where I live.


99 silverado 5.3
2003 tundra v6
1981 toyota cressida wagon
2003 kia sorento
04 toyota highlander 4cyl 2013 toyota rav4
Re: 2004 Silverado [Re: marine65] #5392148 04/02/20 08:14 PM
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dogememe Offline
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Originally Posted by marine65
Originally Posted by mjk
Hi,

A unique opportunity may have just come up, possibly changing my direction in looking at trucks.

Looking for anything from that year (5.3 z71) that may pop out as unusual issues, compared to other years of GM in that era.

I've put on about 110k on my 01 Tahoe, so familiar with the usual - fuel pumps, Intake gaskets, window regulators, maintenance of drivetrain....

Thanks, and stay healthy.


Why you you want to buy another G.M. product when the one you have has given you all that repair work in only 110 K?
I just don't understand the fascination with sub par products.


These are not subpar products. At 291k the only issue with my 2001 Suburban is an intermittent misfire above 4500rpm... Now I'm the 2nd owner so I don't have all the repair history but I drive my stuff hard and so far I've only had to change the water pump. I did also do shocks, started changing all the fluids, etc. But all the windows and AC and everything works perfectly. And now that it has new shocks it rides like a new truck. The steering is getting a little sloppy due to a work gearbox but it's still safe and enjoyable to drive. I can't say enough good stuff about GMT800 trucks. This is my first after a dozen GMT400 trucks... Which are very solid but the interior, ride quality, brakes, and handling are such an improvement I'd never go back.

Last edited by dogememe; 04/02/20 08:17 PM.

2010 Ford Escape 2.5 ~104K Miles: AMSOIL Signature Series 0W-30, Wix Filter.
2001 Chevy Suburban 5.3 ~292K Miles: Valvoline Maxlife 10W-30, ACDelco Filter.
Re: 2004 Silverado [Re: mjk] #5392184 04/02/20 09:02 PM
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jeepman3071 Offline
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2001 and 2004 are fairly similar chassis wise. My main concerns would be rust, the transfer case pump, electrical gremlins, and the 4L60E automatic transmission. If all that is good and you can get it for a good deal, then I don't see why not. Trucks tend to hold their value.


1998 Jeep Wrangler Sahara 4.0L/5MT (157k) - PHM 10w30, Wix 51085
2009 BMW 328i N51 (61k) - Liqui Moly 5w40, MANN HU816X
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