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  1. CTX-SLPR

    Vortec 454 Fan Upgrade

    Howdy, I have to put a new fan clutch (Probably Hayden Severe Duty) on my 98 454 as the AC isn’t up to cooling the truck at idle even with the whole heater core bypassed. With the fan coming out anyway, is there an upgrade for the blades? I have the black aluminum bladed version (verified...
  2. CTX-SLPR

    Vortec 454 Radiator side Oil Cooler O-rings

    Howdy, After much digging I can’t find any information on replacement O rings for the oil cooler. It’s much hotter here in TX than when I lived in CA (I’m from TX so this isn’t a surprise) so I think it’s worth getting it back in action by pulling the plugs on the pan rail and reinstalling the...
  3. CTX-SLPR

    HVAC Actuators: Do Them All Proactively

    Howdy, Been troubleshooting my AC and narrowed it down to a failed heater valve and blend door so the heater would run at the same time as the AC making for all sorts of conflicting data. While I was in there cleaning the evaporator core I found the recirc door doesn't fully close so that's...
  4. CTX-SLPR

    Replacement Bench Seat Floor Mats

    Howdy, Since I have a 9pax Suburban with the 60/40 front bench I'm looking for replacement floor mats that include the section that goes up over the transmission hump as grippy studs are gone from my original. I'd prefer the 60/40 split like OEM but single piece wouldn't be the end of the...
  5. CTX-SLPR

    Power Lock Short

    Howdy, Chasing a problem with my power locks where they will blow the fuse instantly and intermittently trip a 30A thermal breaker. Keyless entry still works though not super reliably. I've pulled the door and kick panel off and have isolated the short to the body side of the power lock...
  6. CTX-SLPR

    CV Shaft Removal, Already pulled the knuckle

    Howdy, I'm pulling the whole front end apart to replace all the bushings and ball joints and I forgot to loosen the CV shaft bolts to the diff before pulling the knuckle out on the passengers side. I could put the hub back on the drivers side to use the jam the brake rotor technique but how do...
  7. CTX-SLPR

    98 Suburban K2500 454: Magnaflow Direct Fit Front Cat Pipe Hits Driveshaft

    Howdy folks, In the quest to make my 1998 K2500 Suburban with the 454 in tip top shape for my upcoming move home to TX, I ended up damaging the front (Bank 1) cat and went with a Magnaflow direct fit to replace it (P/N: 4451470). It's a very nice looking unit, mandrel bent pipes and decent...
  8. CTX-SLPR

    98 Key Fobs: OEM vs. Aftermarket

    Howdy folks, Got an aftermarket key fob for my 98 barn door suburban and while it worked great, the first accidental trip through the washing machine killed it. The OEM fob physically fell apart but had survived a few of the same trips beforehand. Is there a top tear brand of aftermarket fob...
  9. CTX-SLPR

    Bay Area, CA Interior Shops

    Howdy, While normally I tend to want to try work myself vs. farming it out, I'm pinched for time when it comes to getting things ready for our upcoming move. I need someone to rebuild the drivers 60% bench bottom on my 98 Suburban and want to see if anyone has a recommendation for a Bay Area...
  10. CTX-SLPR

    Suburbans: GMT800 2500 vs. GMT900 2500 vs. GMT900 "Fancy" (Denali/Escalade)

    As much as I love Bruce (our 1998 K2500 Suburban with the 454), it's at 200k miles and it is a salvage title vehicle I got with a long backlog of neglected maintenance. Now while I've been putting good parts and effort into the truck, there's a limit to how much I want to trust it driving from...
  11. CTX-SLPR

    Fuel Pump Assembly: What Brand

    Howdy, Either I have bum 5-0 Motorsports injectors or my fuel pressure is too low (getting a new gauge tomorrow, my trusty old one started leaking). I'm going to suspect that at 197k miles the pump doesn't have the oomph for the new injectors; with nearly a full tank of course... What brand...
  12. CTX-SLPR

    New Injectors and Distributor, Now Random Misfires

    1998 K2500 Suburban, 454 (7.4L Vortec) So I started off replacing my fuel pressure regulator and stock injectors with 5-0 Motorsport stock replacement units. While working on that I went to replace the cap and rotor and cracked the ears off of the distributor body so had to replace that too...
  13. CTX-SLPR

    60-40 Bench Redo

    Howdy, I’ve found two companies that make covers for the drivers side of the 60-40 split benches and one that makes the buns for the bucket seat. Has anyone ever taken the buns from the bucket and spliced it into the existing foam on the 60 side to patch it up? Considering that most of the...
  14. CTX-SLPR

    eBay Billet Distributor Reviews

    Howdy folks, Had an ear break off of my distributor body on my ‘98 Vortec 454 (7.4L) so I need a new one. In the distributor thread this interesting piece was mentioned eBay Billet, $249.99 but there are no reviews and before I pull the trigger I wanted to check if anyone had direct experience...
  15. CTX-SLPR

    Vortec 454 (7.4L) Fuel Injector Clips

    Got everything torn down and the old injectors out in prep for new 5-0 Motorsports injectors but was not expecting those goofy injector retainers. I had to cut one of the sides of one to get it off without breaking the nub on the rail and Chilton's says to discard them. Checking stocks and no...
  16. CTX-SLPR

    L67 vs. 5-0 Motorsports Injectors

    Howdy, Doing more maintenance on the 98 K2500 Suburban and am thinking about getting replacement injectors in there. Hot start is still long time to time but mostly OK, better with the new regulator. I have 6x L67 injectors already from a previous project so I'd just have to get two more for...
  17. CTX-SLPR

    98 K2500 Hydroboost to NBS/GMT800 Hydroboost

    The hydroboost is leaking on my 98 K2500 Suburban, it's wet back where the cast iron front and rear halfs meet up. I've done some searching but most of what I see is for 1500 Vac to hydroboost. I would love to make my brakes work a bit better on my Suburban with the GMT800 Master as well which...
  18. CTX-SLPR

    98 K2500 Vortec 454 (7.4L) Oil Filter Adapter

    Howdy, So after all the work I did to fix most of the stuff that was wrong or just worn out on my '98 K2500 Surburban and she runs so much better now. However luck would have it that the oil filter adapter starts leaking right after I do all of the work including dropping the exhaust and the...
  19. CTX-SLPR

    K2500 Suburban with K1500 Rear Leafs

    Howdy, I know this will work from a functional standpoint because folks go the other way frequently. My 98 K2500 Suburban mainly hauls people (we use all 9 seats about quarterly and 6 frequently) and light stuff so I'd like to soften out the rear ride. I was thinking 1500 leafs to start with...
  20. CTX-SLPR

    AIR Check Valve Removal

    Howdy, Got most of the way through the big maintenance cycle on the Suburban and the last thing that needs to come apart is the AIR check valves. I got wrenches on both nut and valve and have tried to get them loose after soaking them in PB Blaster and even took the MAP torch to one and they...
  21. CTX-SLPR

    Getting the Stock Rear Exhaust Section Out of a Surburban

    Howdy, Searched for this and didn’t find anything so I thought I’d give my experience of pulling the factory rear exhaust section out of my 98 454 K2500 Suburban. It’s not easy, especially solo, but can be done. The really annoying part is you have to pull the rear driveshaft to get it out as...
  22. CTX-SLPR

    Front Bench and Overhead Console

    Howdy, Could you get a full length overhead console with a front bench from the factory in a Suburban? Want to add an overhead console to my Suburban but there's probably a good reason if they never did it factory. Thanks
  23. CTX-SLPR

    L67 Injectors on a Stock 454

    So my auto performance love is the Buick V6 so I’ve got 6 of the L67 injectors just sitting around after upgrading to some 55lb/hr on my project car. I’m also pulling the intake off to replace the fuel pressure regulator and clean things up coming up in a few weeks. I have HPTuners so doing...
  24. CTX-SLPR

    Discontinued Emissions Part for 454

    Howdy, I need a replacement 12550930 emissions valve, they are discontinued and being CA I can't just bypass it. Anyone have one they are removing or if someone sees one in the scrap yard I'd love to have it. Mine sounds like it has a kazoo inside of it
  25. CTX-SLPR

    A.I.R. Pump Valve (Discontinued)

    Howdy, So I've been getting a really obnoxious squeeling/humming/gurgling sound from underhood on my 98 Vortec 454. Snooping around for it, it's coming from the mushroom shaped A.I.R. Pump Valve (12550930 part number on top). Looking for a replacement it shows discontinued everywhere. It...
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