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  1. redfishsc

    Keys, locks, ignition switch solutions?

    So my 1999 Suburban has a lot of key related issues. All three of the door locks (driver, passenger, and rear) are in need of replacement. The keyless remote won't accept programming anymore on new keyfobs (I know the procedure). The ignition switch is starting to show signs of failure (have to...
  2. redfishsc

    1999 L31 Engine with nearly 260k, Timing chain plus what else?

    My 1999 C1500 Sub runs great (well, for now lol) and is approaching 260 miles. L31 Vortec 5.7. Cylinder heads, new mpfi injectors, and lifters replaced a couple years ago. No knocking, oil kept changed, and I drive it hard, maybe 5k miles per year. Trans fluid swapped annually (pan drop, I have...
  3. redfishsc

    Why do the TBI trucks have so much valve rattle?

    So I've owned 2 1990 half tons (4.3 and 5.7) and a 93 S10. The S10 was only 4 years old when I got it with 25k miles. The 1990 4.3 was 8 years old with about 90k, and the 1990 5.7 was a solid 25 years old well over 200k. They all had valve rattle when accelerating "lightly to moderately". No...
  4. redfishsc

    C1500 Suburban Master Cylinder questions

    So yesterday my wife got stranded because the 99 Suburban C1500 broke down. Symptoms are a sudden ABS light on the dash (ABS functioned properly with no light prior to this). Also, the truck wouldn't accelerate. Engine RPM increased but very sluggish acceleration. Truck only just now arrived...
  5. redfishsc

    How do these gears look?

    Ok gents, here's a 10 bolt that I rebuilt in December 2016, 45k miles ago. Serviced it today (not the first oil swap its had). Gears are Motive gear 4.10 with an Eaton Trutrac. No regrets on either purchase. The truck drives fine. The rear end has a minor "hooooooooo" sound from 50-60 but...
  6. redfishsc

    Steering gearbox replacement/rebuild

    I have a ton of play in my steering gearbox and it's not the rag joint. I put in a new rag joint a while back but you can definitely still see play in the gearbox. After I did the ball joints a couple years ago the shop had some difficulty aligning it because of the shop in the gearbox. Also...
  7. redfishsc

    Odd stumble at highway speed, or wind turbulence?

    Ok gents this is a head scratcher for me. I'll put my Suburban specific info below. I cannot tell if my Sub has developed a stumble at highway speeds or if for some reason wind turbulence feels different/more noticeable. This is only felt at about 65+ cruising and feels very much like a...
  8. redfishsc

    5.7 Vortec won't crank cold, exhaust smells rich

    1999 Suburban 5.7. 250k miles After a flawless 2,000 mile drive the week of Thanksgiving, now she doesn't want to start when cold. {EDIT: FOR CLARITY: Engine cranks over, but seems to get no combustion until 10-20 seconds of cranking. Then it spits, misfires, and knocks for a brief while, then...
  9. redfishsc

    Weirdass HVAC issues : random vent and temp changes, no recirc.

    1999 C1500 Suburban. Over the course of the past few weeks: Noticed the recirc was no longer functional. Hit the button, and nothing happens. Still blowing cold air but you can tell it's pulling hot outside air through the evaporator. Then, I started getting about 1/3 of my cold air coming...
  10. redfishsc

    Any master cylinder reservoir upgrades?

    Are there any ways to get rid of this ridiculous snap-on reservoir cover? Man I hate these things. Why the hell couldn't they just do a twist-on like every other manufacturer on the planet? I've read about where guys have swapped in the GMT800 master cylinder into a GMT400 for various reasons...
  11. redfishsc

    Getting rid of the mushy brake pedal; share your tips

    I've owned 4 GMT400 trucks. Two pickups from 1990 and two Suburbans from 1999. The 1990 ones always had good brakes but I prefer the 4 wheel ABS of the later 90's models. Those later models are PLAGUED with mushy brakes. Threads everywhere about what to do about it. Here is what I've...
  12. redfishsc

    Wheel cylinder quality. $50 Delco worth it?

    So this jackasshole pulled out in front of me the other day and I had to panic stop-swerve-drift-slide to miss him. Thankfully I keep the brakes in top shape on this 99 Sub C1500. Except that the panic stop blew a wheel cylinder that was hardly 1.5 years old. I think I got them from Autozone...
  13. redfishsc

    Who put V-Tech on my L31?

    So I have a problem going on that I'm only just now caring enough to start investing. Lately (the past 6 months honestly) my low-rpm power has decreased noticeably but not such that it effects driveability. 1999 Suburban, 5.7, engine is stock except for upgraded MPFI injectors. 2 years ago I...
  14. redfishsc

    Losing coolant at rear heater core rubber hoses

    How do I replace the rubber hoses in the rear of this 99 Suburban? The rear heat works fine and the core doesn't leak, and the kids seem to like the heat in the winter. I cannot find replacement molded hoses, and the connections are crimped. These two hoses are short loops that connect the...
  15. redfishsc

    Torque converter options, 4L60e in a 99 Sub

    I'm suspecting a new Trans in is my future and I'll probably have it rebuilt locally a shift kit installed but I also want to look at TC options. I re-geared the rear end to 4.10 (from 3.42) so that's something to take into consideration. It really does make this truck more drivable around...
  16. redfishsc

    Vibration STOPS when applying brakes

    So here's a strange one. 1999 Suburban C1500. 230k miles. Recently the truck developed a vibration starting about 45 mph. Kind of a moaning sound that got louder and more easily felt as speed increased. Feels like it's the front to me. Front tires were getting old so I had them replaced...
  17. redfishsc

    Rear coolant/core lines leaking.

    My 99 Sub (with rear heat/AC) drips coolant (slowly) from the rubber hose that joins the heater core to the main line coming from the front of the truck. Those lines are crimped on and have some funky bends. I can't seem to find decent replacements at places like RockAuto. Can anyone suggest...
  18. redfishsc

    Somebody's knockin........

    99 K 1500 Suburban. She started knocking really obvious today, occasionally squeaking instead of a knock. Knocks both cold and hot. You can hear the knock really obviously if you steth the exhaust manifold near Cyl 6&8. Pretty sure I have a bearing that's spinning like CNN. So either I'm...
  19. redfishsc

    99 C1500 Suburban reeks of gas sometimes

    My 99 C1500 Sub (5.7) occasionally reeks of gas outside the truck (rarely if ever inside). Not the "about to explode" odor of huge amounts of gas vapor, but definitely noticeable after we park it. It seems to be originating from near the fuel tank but I never see any drips, and I never can sniff...
  20. redfishsc

    Bad starter, bad connection, or bad ignition switch/neutral safety switch?

    Good day gents, My 99 Suburban C1500 (5.7L) has been failing to start lately. Battery has plenty of voltage, and swapping batteries (from my other truck) changed nothing, still fails to start. The failure is just a single "click" and the Starter does not rotate. The click sounds like the...
  21. redfishsc

    Head gasket swap.... won't crank now... 150 psi compression...Vortec 5.7

    Amidst all this sinus infection I've been trying to get this truck to start. I'm stumped--- this isn't the first head gasket job I've done on this generation 5.7. This is a 99 Suburban... one of the two I own. I did this same job to the other one last year, didn't run into this issue. I'm sure...
  22. redfishsc

    She cranked but she damn sure wasn't happy about it.

    So in the midst of a sinus infection I got the last few things bolted back on this 99 Suburban after swapping cylinder heads for fresh remans. 5.7 Vortec. I've done this before on a nearly identical truck so this time went with far less trouble except me dropping everything. So tonight I went...
  23. redfishsc

    Oil pan removal on 99 C1500 Sub?

    How much hassle is it to drop the oil pan on a 99 5.7l C1500 ? At 230k miles I am considering dropping the pan for a fresh gasket and inspect the oil pickup screen. Distributor gear looks brand new, and it looked brand new 2 years ago when I did the intake gasket. So I think the oil pump...
  24. redfishsc

    Replacing lifters while the heads are off? Or waste of money?

    1999 C1500 Suburban. 225k miles. Doing a head gasket job on it. Motor is in good shape as long as I dont discover anything nasty in the piston chambers tomorrow when I pop the heads off. Engine is clean as can be expected at 225k. No coolant in the oil. Never suspected bad lifters but I am...
  25. redfishsc

    Can't move exhaust manifold enough to access head bolts 5.7 Vortec

    I had no major hassle last year when i did this same cylinder head R&R to my 99 K1500, but on my 99 C1500 for some reason I just can't pry the exhaust manifold (passenger side) enough to reach the lower head bolts that sit under the exhaust port. I can pry it away just enough to see them and...

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