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Thread: Hey, what is that SMELL ?

  1. #1
    Join Date
    Apr 2004
    Posts
    126
    Got 500 miles on the new 04, hooked up my 4500 WET RV trailer and
    head down the road, staying in 3rd and running 70 @2800 rpm I kept
    getting this smell like , raw crude or propane gas, not quite like a what
    a cat smells likes, but similiar, smell happens in vent or recirc mode and
    comes and goes, windows open would flush it out.

    So ONE, why would I smell this IN my new truck? Ex leak? Anyone else?
    mostly stock 04 silverado 1500 CC
    Gibson Headers and Sport truck Cat Back
    5.3L 3.73 Detroit True Trac
    165F therm,HpTuner
    07 17" Sierra wheels
    Dark Grey

  2. #2
    Join Date
    Nov 2003
    Location
    Fort Worth, Texas
    Posts
    600
    Was the smell strong? Might be just a small exhaust leak or something. I kind of notice a smell like you are talking about when my truck is under load. I thought it was maybe the EGR or something, but you don't have EGR on your 04. The smell is very weak and comes and goes like you are talking about. Not too sure what it is.
    2002 Silverado 2500HD LB7 CCSB LT
    EFI Live by Rob at ATP, Edge CTS Insight DSP 5 control, S&B CAI, PPE boost valve, Pro Fab AIH, AirDog II 165, PPE WIF sensor delete plug, 5" stainless exhaust, Cognito braces & HD tie rods, H2's 315/70 R17 BFG's

    2004 Tahoe LT
    2006 Silverado Z71 LS
    1971 Chevy C10

  3. #3
    Join Date
    Apr 2004
    Posts
    126
    Originally posted by 2001si3rr@@May 3 2004, 10:23 AM
    Was the smell strong? Might be just a small exhaust leak or something. I kind of notice a smell like you are talking about when my truck is under load. I thought it was maybe the EGR or something, but you don't have EGR on your 04. The smell is very weak and comes and goes like you are talking about. Not too sure what it is.
    It was like a dog farted for a few minutes strong. Yes it was under
    a good load. And it came and went about 10 times over 400 miles.
    But why did it get into my cab?
    mostly stock 04 silverado 1500 CC
    Gibson Headers and Sport truck Cat Back
    5.3L 3.73 Detroit True Trac
    165F therm,HpTuner
    07 17" Sierra wheels
    Dark Grey

  4. #4
    Join Date
    Nov 2003
    Location
    Fort Worth, Texas
    Posts
    600
    Not sure why or how it's getting in there. Did you run any wires through the fire wall or anything that might not be sealed there? I don't really know how it could have gotten in there.
    2002 Silverado 2500HD LB7 CCSB LT
    EFI Live by Rob at ATP, Edge CTS Insight DSP 5 control, S&B CAI, PPE boost valve, Pro Fab AIH, AirDog II 165, PPE WIF sensor delete plug, 5" stainless exhaust, Cognito braces & HD tie rods, H2's 315/70 R17 BFG's

    2004 Tahoe LT
    2006 Silverado Z71 LS
    1971 Chevy C10

  5. #5
    Join Date
    Apr 2003
    Posts
    97
    A friend of mine had the same problem with his 02, it turned out to be tranny heat (burned oil I guess ), no tranny cooler though. This trucks can get all kinds of smell inside the cab because even with the a/c off it vents some outside air in the truck; this only happened when he was towing heavy loads so I don't know if it's the same problem but you can check it out just in case.

    Hope this helps.
    STOLEN: 2005 SILVERADO 1500 4WD ECSB 5.3L 3.42 gears

    Sold: 2003 SILVERADO 1500 RC STEPSIDE 5.3L 3.73 gears

  6. #6
    Join Date
    Apr 2004
    Posts
    126
    I have the towing pkg and alot of warranty left. Tranny fluid
    is bright red and no smell. And what are those vents on the back of the
    cab? One on each side?
    mostly stock 04 silverado 1500 CC
    Gibson Headers and Sport truck Cat Back
    5.3L 3.73 Detroit True Trac
    165F therm,HpTuner
    07 17" Sierra wheels
    Dark Grey

  7. #7
    Join Date
    Nov 2003
    Location
    Fort Worth, Texas
    Posts
    600
    My tranny temps don't even get to 185 under a heavy load so I know it's not that. The smell is more exhaust like than anything.

    I believe those vents are to releave presure in the cab. There is always air coming in through the a/c vents, and the cab vents help to pull it through the truck I would think.
    2002 Silverado 2500HD LB7 CCSB LT
    EFI Live by Rob at ATP, Edge CTS Insight DSP 5 control, S&B CAI, PPE boost valve, Pro Fab AIH, AirDog II 165, PPE WIF sensor delete plug, 5" stainless exhaust, Cognito braces & HD tie rods, H2's 315/70 R17 BFG's

    2004 Tahoe LT
    2006 Silverado Z71 LS
    1971 Chevy C10

  8. #8
    Join Date
    Apr 2003
    Location
    L.A., California
    Posts
    346
    Originally posted by rckrzy1+May 3 2004, 09:48 AM--><div class='quotetop'>QUOTE(rckrzy1 &#064; May 3 2004, 09:48 AM)</div>
    <!--QuoteBegin-2001si3rr@
    @May 3 2004, 10:23 AM
    Was the smell strong? Might be just a small exhaust leak or something. I kind of notice a smell like you are talking about when my truck is under load. I thought it was maybe the EGR or something, but you don&#39;t have EGR on your 04. The smell is very weak and comes and goes like you are talking about. Not too sure what it is.
    It was like a dog farted for a few minutes strong. Yes it was under
    a good load. And it came and went about 10 times over 400 miles.
    But why did it get into my cab? [/b]

    I don&#39;t know about a dog fart smell, but I do get a smell when under load like when I go up a steep hill. My dog&#39;s farts smell like a dead body, when I&#39;m going up hill it smells like something is burning...like the tranny.
    &#39;01 Sierra 4.8 SCSB
    4.10, Eaton posi, Nelson tune, 160 t-stat, K&N Intake, Magnaflow catback, Vig 3200, Transgo+billets, 100 NX wet shot

  9. #9
    Join Date
    Sep 2003
    Location
    Tucson, AZ
    Posts
    150
    maybe its your upper lip....

    but on a serious note...

    i dont know... dog farts stink.
    still waiting...

  10. #10
    these forums are great at night.....who&#39;da thought i would be reading about dog farts...i love it guys...keep it up&#33;&#33; although i have never had a foul smell in mine like you are describing...good luck figuring it out......i know that there have been a lot of people complaining about the a/c stinking some...but nothing like you are describing....this is more like a mold smell
    2000 Silvo 5.3L, 4L80E, 6" Fabtech lift (bad idea) , 33's, K&N, Gibson headers, Magnaflow Exhaust, HD Hood, JBA plug wires, 4.10's w/auburn posi, radix'd

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